./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/half_2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/half_2.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:01:48,143 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:01:48,216 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:01:48,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:01:48,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:01:48,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:01:48,255 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:01:48,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:01:48,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:01:48,257 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:01:48,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:01:48,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:01:48,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:01:48,261 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:01:48,261 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:01:48,262 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:01:48,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:01:48,262 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:01:48,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:01:48,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:01:48,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:01:48,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:01:48,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:01:48,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:01:48,268 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:01:48,268 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:01:48,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:01:48,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:01:48,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:01:48,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:01:48,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:01:48,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:01:48,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:01:48,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:01:48,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:01:48,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:01:48,272 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:01:48,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:01:48,272 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:01:48,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:01:48,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:01:48,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:01:48,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:01:48,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:01:48,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:01:48,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:01:48,582 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:01:48,582 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:01:48,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/half_2.i [2024-09-20 12:01:50,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:01:50,303 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:01:50,303 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i [2024-09-20 12:01:50,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/45ee14e49/4e083e1aef594d8f8aa1e9f0d41c7221/FLAG00eabcdd2 [2024-09-20 12:01:50,323 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/45ee14e49/4e083e1aef594d8f8aa1e9f0d41c7221 [2024-09-20 12:01:50,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:01:50,326 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:01:50,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:01:50,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:01:50,335 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:01:50,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a0a321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50, skipping insertion in model container [2024-09-20 12:01:50,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,357 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:01:50,498 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2024-09-20 12:01:50,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:01:50,520 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:01:50,534 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2024-09-20 12:01:50,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:01:50,553 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:01:50,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50 WrapperNode [2024-09-20 12:01:50,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:01:50,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:01:50,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:01:50,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:01:50,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,576 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:01:50,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:01:50,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:01:50,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:01:50,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:01:50,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,590 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,609 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 12:01:50,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,610 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,612 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:01:50,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:01:50,626 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:01:50,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:01:50,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (1/1) ... [2024-09-20 12:01:50,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:01:50,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:50,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 12:01:50,671 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 12:01:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:01:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:01:50,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:01:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:01:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:01:50,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:01:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:01:50,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:01:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:01:50,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:01:50,788 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:01:50,790 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:01:51,048 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-20 12:01:51,051 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:01:51,077 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:01:51,078 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:01:51,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:01:51 BoogieIcfgContainer [2024-09-20 12:01:51,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:01:51,082 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:01:51,083 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:01:51,086 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:01:51,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:01:50" (1/3) ... [2024-09-20 12:01:51,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7990a75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:01:51, skipping insertion in model container [2024-09-20 12:01:51,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:01:50" (2/3) ... [2024-09-20 12:01:51,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7990a75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:01:51, skipping insertion in model container [2024-09-20 12:01:51,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:01:51" (3/3) ... [2024-09-20 12:01:51,090 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2024-09-20 12:01:51,109 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:01:51,109 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:01:51,171 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:01:51,178 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;@636756ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:01:51,178 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:01:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2024-09-20 12:01:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 12:01:51,189 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:51,190 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:51,191 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:51,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-20 12:01:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:51,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712021908] [2024-09-20 12:01:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:51,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:51,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712021908] [2024-09-20 12:01:51,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712021908] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:01:51,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:01:51,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 12:01:51,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181310988] [2024-09-20 12:01:51,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:01:51,705 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:01:51,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:01:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:01:51,736 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:01:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:51,867 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-20 12:01:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:01:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 12:01:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:51,876 INFO L225 Difference]: With dead ends: 46 [2024-09-20 12:01:51,877 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 12:01:51,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:01:51,886 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:51,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:01:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 12:01:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-20 12:01:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:01:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-20 12:01:51,928 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-20 12:01:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:51,929 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-20 12:01:51,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:01:51,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-20 12:01:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 12:01:51,931 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:51,931 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:51,932 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:01:51,932 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:51,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-20 12:01:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:51,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333265736] [2024-09-20 12:01:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:52,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:52,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333265736] [2024-09-20 12:01:52,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333265736] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:52,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134548372] [2024-09-20 12:01:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:52,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:52,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:01:52,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:01:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:52,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:01:52,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:52,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:01:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:52,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134548372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:01:52,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:01:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-20 12:01:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975991514] [2024-09-20 12:01:52,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:01:52,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:01:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:01:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:01:52,700 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:01:52,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:52,996 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-09-20 12:01:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:01:52,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 12:01:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:53,000 INFO L225 Difference]: With dead ends: 43 [2024-09-20 12:01:53,000 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 12:01:53,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:01:53,002 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:53,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:01:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 12:01:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-20 12:01:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:01:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-20 12:01:53,020 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 14 [2024-09-20 12:01:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:53,021 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-20 12:01:53,022 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:01:53,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-20 12:01:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:01:53,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:53,025 INFO L216 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:53,044 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 12:01:53,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:53,227 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash 956344902, now seen corresponding path program 2 times [2024-09-20 12:01:53,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:53,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775764842] [2024-09-20 12:01:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:53,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:53,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775764842] [2024-09-20 12:01:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775764842] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932552101] [2024-09-20 12:01:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:01:53,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:53,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:01:53,373 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:01:53,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:01:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:01:53,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:01:53,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:53,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:01:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932552101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:01:53,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:01:53,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-20 12:01:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825353442] [2024-09-20 12:01:53,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:01:53,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 12:01:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 12:01:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:01:53,648 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 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) [2024-09-20 12:01:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:53,815 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-09-20 12:01:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 12:01:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 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 16 [2024-09-20 12:01:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:53,818 INFO L225 Difference]: With dead ends: 56 [2024-09-20 12:01:53,818 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 12:01:53,819 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:01:53,820 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:53,820 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 173 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:01:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 12:01:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2024-09-20 12:01:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:01:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-20 12:01:53,830 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2024-09-20 12:01:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:53,831 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-20 12:01:53,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 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) [2024-09-20 12:01:53,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-20 12:01:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 12:01:53,832 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:53,832 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:53,849 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:01:54,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:54,037 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:54,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1089087464, now seen corresponding path program 1 times [2024-09-20 12:01:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:54,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883501437] [2024-09-20 12:01:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-20 12:01:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:54,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:54,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883501437] [2024-09-20 12:01:54,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883501437] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:54,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247995055] [2024-09-20 12:01:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:54,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:54,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:54,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:01:54,181 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:01:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 12:01:54,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:54,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:01:54,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247995055] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:01:54,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:01:54,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-20 12:01:54,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337498273] [2024-09-20 12:01:54,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:01:54,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 12:01:54,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 12:01:54,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:01:54,273 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 12:01:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:54,320 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-09-20 12:01:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:01:54,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-20 12:01:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:54,323 INFO L225 Difference]: With dead ends: 48 [2024-09-20 12:01:54,323 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 12:01:54,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:01:54,325 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:54,326 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:01:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 12:01:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 12:01:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:01:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-09-20 12:01:54,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2024-09-20 12:01:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:54,341 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-09-20 12:01:54,341 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 12:01:54,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-09-20 12:01:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:01:54,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:54,343 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:54,361 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:01:54,547 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:54,548 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:54,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash -177252568, now seen corresponding path program 1 times [2024-09-20 12:01:54,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:54,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392162021] [2024-09-20 12:01:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:54,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:01:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:54,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:54,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392162021] [2024-09-20 12:01:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392162021] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:54,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536743782] [2024-09-20 12:01:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:54,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:54,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:54,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:01:54,883 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:01:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:54,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 12:01:54,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:55,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:01:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:01:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536743782] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:01:55,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:01:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-09-20 12:01:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382222719] [2024-09-20 12:01:55,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:01:55,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:01:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:01:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:01:55,339 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:01:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:55,647 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-20 12:01:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 12:01:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-09-20 12:01:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:55,648 INFO L225 Difference]: With dead ends: 66 [2024-09-20 12:01:55,648 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 12:01:55,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:01:55,650 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:55,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:01:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 12:01:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2024-09-20 12:01:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:01:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-09-20 12:01:55,660 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2024-09-20 12:01:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:55,661 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-09-20 12:01:55,661 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:01:55,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-09-20 12:01:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 12:01:55,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:55,662 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:55,679 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 12:01:55,866 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:55,867 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:55,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:55,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-20 12:01:55,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:55,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269749856] [2024-09-20 12:01:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:01:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:01:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:01:56,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:56,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269749856] [2024-09-20 12:01:56,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269749856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:56,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221327177] [2024-09-20 12:01:56,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:01:56,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:56,051 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) [2024-09-20 12:01:56,065 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:01:56,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:01:56,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:01:56,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:01:56,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:01:56,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:01:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:01:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221327177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:01:56,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:01:56,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-09-20 12:01:56,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752132311] [2024-09-20 12:01:56,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:01:56,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 12:01:56,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 12:01:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:01:56,300 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:01:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:56,437 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-09-20 12:01:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:01:56,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2024-09-20 12:01:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:56,440 INFO L225 Difference]: With dead ends: 60 [2024-09-20 12:01:56,440 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 12:01:56,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:01:56,441 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:56,441 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:01:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 12:01:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-20 12:01:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:01:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-09-20 12:01:56,458 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2024-09-20 12:01:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:56,459 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-09-20 12:01:56,459 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:01:56,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-09-20 12:01:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 12:01:56,460 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:56,461 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:56,497 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 12:01:56,679 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 12:01:56,680 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:56,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1852463814, now seen corresponding path program 3 times [2024-09-20 12:01:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524249130] [2024-09-20 12:01:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:01:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:01:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:01:56,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524249130] [2024-09-20 12:01:56,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524249130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280470354] [2024-09-20 12:01:56,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:01:56,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:56,994 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) [2024-09-20 12:01:56,995 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:01:57,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 12:01:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:01:57,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:01:57,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:01:57,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:01:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:01:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280470354] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:01:57,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:01:57,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-09-20 12:01:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592286982] [2024-09-20 12:01:57,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:01:57,726 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 12:01:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 12:01:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-09-20 12:01:57,728 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:01:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:58,037 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2024-09-20 12:01:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 12:01:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 30 [2024-09-20 12:01:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:58,038 INFO L225 Difference]: With dead ends: 68 [2024-09-20 12:01:58,038 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 12:01:58,039 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 12:01:58,042 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:58,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 174 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:01:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 12:01:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 12:01:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:01:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-20 12:01:58,058 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 30 [2024-09-20 12:01:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:58,060 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-20 12:01:58,060 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:01:58,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-20 12:01:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 12:01:58,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:58,062 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:58,080 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:01:58,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:58,263 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:58,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1152152512, now seen corresponding path program 4 times [2024-09-20 12:01:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:58,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539412916] [2024-09-20 12:01:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:58,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:58,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:58,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 12:01:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:58,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:01:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:01:58,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:58,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539412916] [2024-09-20 12:01:58,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539412916] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:58,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161838957] [2024-09-20 12:01:58,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:01:58,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:58,443 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) [2024-09-20 12:01:58,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:01:58,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:01:58,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:01:58,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 12:01:58,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:01:58,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:01:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:01:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161838957] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:01:58,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:01:58,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 24 [2024-09-20 12:01:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873303772] [2024-09-20 12:01:58,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:01:58,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 12:01:58,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:01:58,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 12:01:58,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-20 12:01:58,820 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:01:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:01:58,957 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-20 12:01:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 12:01:58,958 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-09-20 12:01:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:01:58,959 INFO L225 Difference]: With dead ends: 54 [2024-09-20 12:01:58,959 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 12:01:58,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:01:58,960 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:01:58,961 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:01:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 12:01:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-20 12:01:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:01:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-09-20 12:01:58,972 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2024-09-20 12:01:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:01:58,972 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-09-20 12:01:58,972 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:01:58,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-09-20 12:01:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 12:01:58,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:01:58,974 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:01:58,993 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 12:01:59,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:59,175 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:01:59,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:01:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -164723864, now seen corresponding path program 5 times [2024-09-20 12:01:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:01:59,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83176271] [2024-09-20 12:01:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:01:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:01:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:59,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:01:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:59,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 12:01:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:59,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:01:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:59,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:01:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:01:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:01:59,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:01:59,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83176271] [2024-09-20 12:01:59,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83176271] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:01:59,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661593558] [2024-09-20 12:01:59,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:01:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:01:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:01:59,602 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) [2024-09-20 12:01:59,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:01:59,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-20 12:01:59,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:01:59,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:01:59,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:01:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:01:59,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:02:00,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661593558] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:00,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:00,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-09-20 12:02:00,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281708746] [2024-09-20 12:02:00,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:00,446 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 12:02:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 12:02:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2024-09-20 12:02:00,448 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:02:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:01,051 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-09-20 12:02:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 12:02:01,052 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 38 [2024-09-20 12:02:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:01,054 INFO L225 Difference]: With dead ends: 97 [2024-09-20 12:02:01,054 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 12:02:01,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 12:02:01,056 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:01,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 174 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:02:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 12:02:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-20 12:02:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 50 states have internal predecessors, (53), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:02:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-09-20 12:02:01,069 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 38 [2024-09-20 12:02:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:01,069 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-09-20 12:02:01,069 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:02:01,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-09-20 12:02:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 12:02:01,071 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:01,071 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:01,090 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 12:02:01,275 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:01,276 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:01,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-20 12:02:01,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:01,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185509579] [2024-09-20 12:02:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:01,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:01,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:01,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:02:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:01,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:02:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:01,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:02:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:02:01,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185509579] [2024-09-20 12:02:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185509579] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674885125] [2024-09-20 12:02:01,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:02:01,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:01,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:01,633 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) [2024-09-20 12:02:01,635 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:02:01,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-20 12:02:01,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:01,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:02:01,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:02:01,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:02:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674885125] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:02,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2024-09-20 12:02:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763897374] [2024-09-20 12:02:02,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:02,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 12:02:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 12:02:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 12:02:02,235 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:02:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:02,577 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2024-09-20 12:02:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:02:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2024-09-20 12:02:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:02,579 INFO L225 Difference]: With dead ends: 120 [2024-09-20 12:02:02,579 INFO L226 Difference]: Without dead ends: 118 [2024-09-20 12:02:02,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=503, Invalid=1947, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 12:02:02,581 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:02,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 243 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:02:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-20 12:02:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-09-20 12:02:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 87 states have internal predecessors, (88), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-20 12:02:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-20 12:02:02,622 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 43 [2024-09-20 12:02:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:02,622 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-20 12:02:02,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:02:02,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-20 12:02:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:02:02,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:02,625 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:02,639 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:02,825 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 12:02:02,826 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:02,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash -560948602, now seen corresponding path program 7 times [2024-09-20 12:02:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470206672] [2024-09-20 12:02:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:03,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:03,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 12:02:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:03,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:02:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:03,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:02:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:03,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:02:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:02:03,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:03,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470206672] [2024-09-20 12:02:03,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470206672] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985719349] [2024-09-20 12:02:03,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:02:03,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:03,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:03,310 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) [2024-09-20 12:02:03,335 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:02:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:03,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 12:02:03,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:02:03,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:02:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985719349] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:04,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:04,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2024-09-20 12:02:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801257318] [2024-09-20 12:02:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:04,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 12:02:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 12:02:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 12:02:04,226 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 12:02:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:04,900 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2024-09-20 12:02:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:02:04,901 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 46 [2024-09-20 12:02:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:04,903 INFO L225 Difference]: With dead ends: 176 [2024-09-20 12:02:04,903 INFO L226 Difference]: Without dead ends: 139 [2024-09-20 12:02:04,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 12:02:04,905 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:04,905 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 210 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:02:04,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-20 12:02:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-20 12:02:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 100 states have internal predecessors, (102), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-20 12:02:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2024-09-20 12:02:04,931 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 46 [2024-09-20 12:02:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:04,931 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2024-09-20 12:02:04,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 12:02:04,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2024-09-20 12:02:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 12:02:04,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:04,934 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:04,947 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:05,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 12:02:05,134 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:05,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1996799912, now seen corresponding path program 8 times [2024-09-20 12:02:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:05,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412930263] [2024-09-20 12:02:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:05,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:05,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 12:02:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:05,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:02:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:05,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:02:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:05,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 12:02:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:05,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 12:02:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:02:05,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:05,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412930263] [2024-09-20 12:02:05,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412930263] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:05,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890037195] [2024-09-20 12:02:05,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:02:05,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:05,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:05,688 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) [2024-09-20 12:02:05,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:02:05,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:02:05,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:05,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:02:05,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:02:06,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:02:06,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890037195] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:06,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:06,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 47 [2024-09-20 12:02:06,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902159824] [2024-09-20 12:02:06,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:06,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 12:02:06,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:06,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 12:02:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 12:02:06,826 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 12:02:07,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:07,679 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2024-09-20 12:02:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 12:02:07,680 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 54 [2024-09-20 12:02:07,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:07,681 INFO L225 Difference]: With dead ends: 197 [2024-09-20 12:02:07,682 INFO L226 Difference]: Without dead ends: 153 [2024-09-20 12:02:07,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=589, Invalid=3571, Unknown=0, NotChecked=0, Total=4160 [2024-09-20 12:02:07,684 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:07,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:02:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-20 12:02:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2024-09-20 12:02:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 111 states have internal predecessors, (114), 34 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (33), 28 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-20 12:02:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2024-09-20 12:02:07,728 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 54 [2024-09-20 12:02:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:07,728 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2024-09-20 12:02:07,728 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 12:02:07,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2024-09-20 12:02:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 12:02:07,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:07,730 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:07,742 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 12:02:07,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:07,931 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:07,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1940245062, now seen corresponding path program 9 times [2024-09-20 12:02:07,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:07,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220552431] [2024-09-20 12:02:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:07,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:02:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:02:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:02:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:02:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 12:02:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:02:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 12:02:08,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:08,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220552431] [2024-09-20 12:02:08,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220552431] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:08,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990995482] [2024-09-20 12:02:08,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:02:08,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:08,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:08,601 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) [2024-09-20 12:02:08,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:02:08,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 12:02:08,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:08,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 12:02:08,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 12:02:09,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 12:02:09,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990995482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:09,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:09,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 46 [2024-09-20 12:02:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547972333] [2024-09-20 12:02:09,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:09,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-20 12:02:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-20 12:02:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:02:09,868 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 12:02:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:11,043 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2024-09-20 12:02:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 12:02:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 62 [2024-09-20 12:02:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:11,046 INFO L225 Difference]: With dead ends: 215 [2024-09-20 12:02:11,046 INFO L226 Difference]: Without dead ends: 164 [2024-09-20 12:02:11,050 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=595, Invalid=3437, Unknown=0, NotChecked=0, Total=4032 [2024-09-20 12:02:11,051 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:11,051 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 298 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:02:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-09-20 12:02:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2024-09-20 12:02:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 120 states have internal predecessors, (124), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-20 12:02:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2024-09-20 12:02:11,093 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 62 [2024-09-20 12:02:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:11,093 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2024-09-20 12:02:11,094 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 12:02:11,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2024-09-20 12:02:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 12:02:11,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:11,095 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:11,113 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:11,296 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 12:02:11,296 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:11,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash 391515112, now seen corresponding path program 10 times [2024-09-20 12:02:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:11,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379860003] [2024-09-20 12:02:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:11,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:02:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 12:02:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:02:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 12:02:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 12:02:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 12:02:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:02:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 65 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 12:02:11,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:11,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379860003] [2024-09-20 12:02:11,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379860003] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:11,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317414860] [2024-09-20 12:02:11,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:02:11,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:11,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:11,989 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) [2024-09-20 12:02:11,991 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:02:12,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:02:12,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:12,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:02:12,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 12:02:12,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 12:02:13,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317414860] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:13,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:13,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 51 [2024-09-20 12:02:13,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447005667] [2024-09-20 12:02:13,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:13,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 12:02:13,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:13,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 12:02:13,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 12:02:13,275 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-20 12:02:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:14,582 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2024-09-20 12:02:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 12:02:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 70 [2024-09-20 12:02:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:14,585 INFO L225 Difference]: With dead ends: 230 [2024-09-20 12:02:14,585 INFO L226 Difference]: Without dead ends: 172 [2024-09-20 12:02:14,586 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=735, Invalid=4235, Unknown=0, NotChecked=0, Total=4970 [2024-09-20 12:02:14,590 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:14,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 336 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:02:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-20 12:02:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-20 12:02:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 127 states have internal predecessors, (131), 38 states have call successors, (38), 11 states have call predecessors, (38), 10 states have return successors, (37), 31 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-20 12:02:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2024-09-20 12:02:14,623 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 70 [2024-09-20 12:02:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:14,624 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2024-09-20 12:02:14,624 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-20 12:02:14,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2024-09-20 12:02:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-20 12:02:14,626 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:14,626 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:14,639 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 12:02:14,826 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 12:02:14,826 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:14,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash 96856582, now seen corresponding path program 11 times [2024-09-20 12:02:14,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:14,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591000323] [2024-09-20 12:02:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:14,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:02:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:02:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:02:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:02:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:02:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 12:02:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 12:02:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 12:02:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 12:02:15,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591000323] [2024-09-20 12:02:15,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591000323] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212259015] [2024-09-20 12:02:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:02:15,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:15,612 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) [2024-09-20 12:02:15,617 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 12:02:15,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-20 12:02:15,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:15,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 12:02:15,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 12:02:16,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 12:02:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212259015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:17,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:17,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 56 [2024-09-20 12:02:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851802231] [2024-09-20 12:02:17,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:17,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 12:02:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 12:02:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 12:02:17,160 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 12:02:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:18,745 INFO L93 Difference]: Finished difference Result 262 states and 310 transitions. [2024-09-20 12:02:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 12:02:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 78 [2024-09-20 12:02:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:18,756 INFO L225 Difference]: With dead ends: 262 [2024-09-20 12:02:18,756 INFO L226 Difference]: Without dead ends: 201 [2024-09-20 12:02:18,758 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=891, Invalid=5115, Unknown=0, NotChecked=0, Total=6006 [2024-09-20 12:02:18,758 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:18,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 461 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:02:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-20 12:02:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2024-09-20 12:02:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 142 states have (on average 1.0774647887323943) internal successors, (153), 148 states have internal predecessors, (153), 46 states have call successors, (46), 12 states have call predecessors, (46), 11 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-20 12:02:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2024-09-20 12:02:18,796 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 78 [2024-09-20 12:02:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:18,796 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2024-09-20 12:02:18,797 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 12:02:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2024-09-20 12:02:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 12:02:18,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:18,799 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:18,815 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:19,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:02:19,003 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:19,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1215928280, now seen corresponding path program 12 times [2024-09-20 12:02:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:19,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583780001] [2024-09-20 12:02:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:19,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:02:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:02:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:02:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 12:02:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:02:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 12:02:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 12:02:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:02:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 12:02:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 110 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 12:02:19,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:19,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583780001] [2024-09-20 12:02:19,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583780001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:19,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45149865] [2024-09-20 12:02:19,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:02:19,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:19,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:19,827 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) [2024-09-20 12:02:19,828 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 12:02:19,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-20 12:02:19,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:19,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 12:02:19,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 12:02:20,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 12:02:22,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45149865] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:22,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:22,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 28] total 75 [2024-09-20 12:02:22,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218473646] [2024-09-20 12:02:22,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:22,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-20 12:02:22,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-20 12:02:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=5023, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 12:02:22,161 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-20 12:02:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:24,746 INFO L93 Difference]: Finished difference Result 256 states and 299 transitions. [2024-09-20 12:02:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 12:02:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 86 [2024-09-20 12:02:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:24,748 INFO L225 Difference]: With dead ends: 256 [2024-09-20 12:02:24,748 INFO L226 Difference]: Without dead ends: 184 [2024-09-20 12:02:24,751 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1096, Invalid=10034, Unknown=0, NotChecked=0, Total=11130 [2024-09-20 12:02:24,751 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:24,751 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 534 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:02:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-20 12:02:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-09-20 12:02:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 137 states have internal predecessors, (141), 42 states have call successors, (42), 11 states have call predecessors, (42), 10 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2024-09-20 12:02:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 224 transitions. [2024-09-20 12:02:24,787 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 224 transitions. Word has length 86 [2024-09-20 12:02:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:24,787 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 224 transitions. [2024-09-20 12:02:24,787 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-20 12:02:24,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 224 transitions. [2024-09-20 12:02:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 12:02:24,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:24,789 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:24,805 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:24,990 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:02:24,990 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:24,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1932610338, now seen corresponding path program 13 times [2024-09-20 12:02:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083157044] [2024-09-20 12:02:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:02:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:02:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:02:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:02:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 12:02:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 12:02:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 12:02:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 12:02:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:02:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 63 proven. 147 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 12:02:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:25,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083157044] [2024-09-20 12:02:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083157044] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:25,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118906356] [2024-09-20 12:02:25,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:02:25,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:25,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:25,478 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) [2024-09-20 12:02:25,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 12:02:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:25,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 12:02:25,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 12:02:25,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 12:02:26,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118906356] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:26,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:26,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-20 12:02:26,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143937094] [2024-09-20 12:02:26,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:26,193 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-20 12:02:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-20 12:02:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 12:02:26,195 INFO L87 Difference]: Start difference. First operand 184 states and 224 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:02:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:26,534 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2024-09-20 12:02:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:02:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2024-09-20 12:02:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:26,536 INFO L225 Difference]: With dead ends: 197 [2024-09-20 12:02:26,536 INFO L226 Difference]: Without dead ends: 195 [2024-09-20 12:02:26,537 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2024-09-20 12:02:26,537 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:26,537 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 205 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:02:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-20 12:02:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2024-09-20 12:02:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.0724637681159421) internal successors, (148), 144 states have internal predecessors, (148), 44 states have call successors, (44), 12 states have call predecessors, (44), 11 states have return successors, (43), 37 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-20 12:02:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2024-09-20 12:02:26,568 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 87 [2024-09-20 12:02:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:26,568 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2024-09-20 12:02:26,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:02:26,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2024-09-20 12:02:26,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-20 12:02:26,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:26,570 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:26,584 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:26,771 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:26,771 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:26,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 202176966, now seen corresponding path program 14 times [2024-09-20 12:02:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:26,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330587948] [2024-09-20 12:02:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:02:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:02:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:02:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:02:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 12:02:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 12:02:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 12:02:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 12:02:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:02:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-20 12:02:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 137 proven. 104 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:02:27,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:27,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330587948] [2024-09-20 12:02:27,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330587948] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:27,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402171388] [2024-09-20 12:02:27,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:02:27,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:27,694 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) [2024-09-20 12:02:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 12:02:27,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:02:27,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:27,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-20 12:02:27,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:02:28,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:02:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402171388] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:29,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:29,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 77 [2024-09-20 12:02:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069601680] [2024-09-20 12:02:29,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:29,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-20 12:02:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:29,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-20 12:02:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=5083, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 12:02:29,949 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-20 12:02:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:32,245 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2024-09-20 12:02:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-20 12:02:32,246 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 94 [2024-09-20 12:02:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:32,248 INFO L225 Difference]: With dead ends: 304 [2024-09-20 12:02:32,248 INFO L226 Difference]: Without dead ends: 233 [2024-09-20 12:02:32,249 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1564, Invalid=9356, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 12:02:32,249 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:32,250 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 526 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:02:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-20 12:02:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2024-09-20 12:02:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 165 states have (on average 1.0787878787878789) internal successors, (178), 171 states have internal predecessors, (178), 54 states have call successors, (54), 13 states have call predecessors, (54), 12 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-20 12:02:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 285 transitions. [2024-09-20 12:02:32,305 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 285 transitions. Word has length 94 [2024-09-20 12:02:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:32,305 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 285 transitions. [2024-09-20 12:02:32,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-20 12:02:32,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 285 transitions. [2024-09-20 12:02:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-20 12:02:32,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:32,307 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:32,324 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 12:02:32,507 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 12:02:32,508 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:32,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1191586712, now seen corresponding path program 15 times [2024-09-20 12:02:32,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:32,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344976576] [2024-09-20 12:02:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:02:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:02:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:02:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:02:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 12:02:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:02:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:02:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 12:02:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 12:02:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 12:02:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-20 12:02:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 167 proven. 120 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:02:33,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344976576] [2024-09-20 12:02:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344976576] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559261129] [2024-09-20 12:02:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:02:33,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:33,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:33,649 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) [2024-09-20 12:02:33,652 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 12:02:33,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-20 12:02:33,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:33,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 12:02:33,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:02:34,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:02:36,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559261129] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:36,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:36,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 83 [2024-09-20 12:02:36,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420560246] [2024-09-20 12:02:36,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:36,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-20 12:02:36,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-20 12:02:36,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=6014, Unknown=0, NotChecked=0, Total=6806 [2024-09-20 12:02:36,300 INFO L87 Difference]: Start difference. First operand 232 states and 285 transitions. Second operand has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-20 12:02:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:38,508 INFO L93 Difference]: Finished difference Result 296 states and 348 transitions. [2024-09-20 12:02:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-20 12:02:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 102 [2024-09-20 12:02:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:38,511 INFO L225 Difference]: With dead ends: 296 [2024-09-20 12:02:38,511 INFO L226 Difference]: Without dead ends: 214 [2024-09-20 12:02:38,512 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1545, Invalid=12027, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 12:02:38,513 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:38,513 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:02:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-20 12:02:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2024-09-20 12:02:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 158 states have internal predecessors, (164), 49 states have call successors, (49), 12 states have call predecessors, (49), 11 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2024-09-20 12:02:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 261 transitions. [2024-09-20 12:02:38,555 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 261 transitions. Word has length 102 [2024-09-20 12:02:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:38,556 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 261 transitions. [2024-09-20 12:02:38,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-20 12:02:38,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 261 transitions. [2024-09-20 12:02:38,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-20 12:02:38,558 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:38,558 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:38,577 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 12:02:38,762 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:38,763 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:38,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1669102750, now seen corresponding path program 16 times [2024-09-20 12:02:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105819060] [2024-09-20 12:02:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:02:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:02:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 12:02:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 12:02:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 12:02:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 12:02:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:02:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 12:02:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-20 12:02:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:02:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-20 12:02:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 88 proven. 212 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:02:39,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:39,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105819060] [2024-09-20 12:02:39,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105819060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:39,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548104388] [2024-09-20 12:02:39,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:02:39,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:39,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:39,329 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) [2024-09-20 12:02:39,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 12:02:39,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:02:39,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:39,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:02:39,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:02:39,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:02:40,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548104388] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:40,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2024-09-20 12:02:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211569608] [2024-09-20 12:02:40,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:40,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-20 12:02:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-20 12:02:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2686, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 12:02:40,251 INFO L87 Difference]: Start difference. First operand 213 states and 261 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 12:02:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:40,625 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2024-09-20 12:02:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:02:40,626 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 103 [2024-09-20 12:02:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:40,627 INFO L225 Difference]: With dead ends: 226 [2024-09-20 12:02:40,627 INFO L226 Difference]: Without dead ends: 224 [2024-09-20 12:02:40,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 191 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=815, Invalid=4015, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 12:02:40,629 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:40,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:02:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-20 12:02:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2024-09-20 12:02:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 159 states have (on average 1.0754716981132075) internal successors, (171), 165 states have internal predecessors, (171), 51 states have call successors, (51), 13 states have call predecessors, (51), 12 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2024-09-20 12:02:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 272 transitions. [2024-09-20 12:02:40,671 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 272 transitions. Word has length 103 [2024-09-20 12:02:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:40,671 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 272 transitions. [2024-09-20 12:02:40,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 12:02:40,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 272 transitions. [2024-09-20 12:02:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-20 12:02:40,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:40,673 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:40,688 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:40,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:40,877 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:40,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1553398150, now seen corresponding path program 17 times [2024-09-20 12:02:40,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:40,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946296836] [2024-09-20 12:02:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:40,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:41,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:41,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:02:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:41,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:02:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:41,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 12:02:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 12:02:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 12:02:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 12:02:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:02:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 12:02:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-20 12:02:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:02:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-20 12:02:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 12:02:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 200 proven. 137 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 12:02:42,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946296836] [2024-09-20 12:02:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946296836] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138789516] [2024-09-20 12:02:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:02:42,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:42,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:42,046 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) [2024-09-20 12:02:42,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 12:02:42,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-20 12:02:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:42,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-20 12:02:42,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-20 12:02:43,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-20 12:02:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138789516] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:45,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 92 [2024-09-20 12:02:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474779779] [2024-09-20 12:02:45,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:45,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-20 12:02:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-20 12:02:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1049, Invalid=7323, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 12:02:45,122 INFO L87 Difference]: Start difference. First operand 223 states and 272 transitions. Second operand has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-20 12:02:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:49,325 INFO L93 Difference]: Finished difference Result 348 states and 417 transitions. [2024-09-20 12:02:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-20 12:02:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 110 [2024-09-20 12:02:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:49,328 INFO L225 Difference]: With dead ends: 348 [2024-09-20 12:02:49,328 INFO L226 Difference]: Without dead ends: 267 [2024-09-20 12:02:49,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5523 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2480, Invalid=15610, Unknown=0, NotChecked=0, Total=18090 [2024-09-20 12:02:49,330 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:49,330 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 619 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 12:02:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-20 12:02:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-09-20 12:02:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 190 states have (on average 1.0789473684210527) internal successors, (205), 196 states have internal predecessors, (205), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2024-09-20 12:02:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 330 transitions. [2024-09-20 12:02:49,395 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 330 transitions. Word has length 110 [2024-09-20 12:02:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:49,395 INFO L474 AbstractCegarLoop]: Abstraction has 267 states and 330 transitions. [2024-09-20 12:02:49,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-20 12:02:49,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 330 transitions. [2024-09-20 12:02:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-20 12:02:49,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:49,397 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:49,413 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:49,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 12:02:49,598 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:49,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1041518760, now seen corresponding path program 18 times [2024-09-20 12:02:49,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:49,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343558601] [2024-09-20 12:02:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:49,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:02:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:02:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:02:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 12:02:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:02:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-20 12:02:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-20 12:02:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 12:02:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-20 12:02:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-20 12:02:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 12:02:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-20 12:02:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-20 12:02:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 236 proven. 155 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 12:02:50,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:50,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343558601] [2024-09-20 12:02:50,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343558601] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:50,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668925400] [2024-09-20 12:02:50,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:02:50,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:50,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:50,984 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) [2024-09-20 12:02:50,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 12:02:51,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-20 12:02:51,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:02:51,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-20 12:02:51,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:02:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 12:02:52,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:02:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 12:02:54,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668925400] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:02:54,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:02:54,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 95 [2024-09-20 12:02:54,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230244993] [2024-09-20 12:02:54,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:02:54,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-09-20 12:02:54,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:02:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-09-20 12:02:54,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=7771, Unknown=0, NotChecked=0, Total=8930 [2024-09-20 12:02:54,079 INFO L87 Difference]: Start difference. First operand 267 states and 330 transitions. Second operand has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-20 12:02:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:02:57,651 INFO L93 Difference]: Finished difference Result 383 states and 461 transitions. [2024-09-20 12:02:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-20 12:02:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 118 [2024-09-20 12:02:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:02:57,655 INFO L225 Difference]: With dead ends: 383 [2024-09-20 12:02:57,655 INFO L226 Difference]: Without dead ends: 295 [2024-09-20 12:02:57,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2389, Invalid=14123, Unknown=0, NotChecked=0, Total=16512 [2024-09-20 12:02:57,657 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:02:57,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 753 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 12:02:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-09-20 12:02:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2024-09-20 12:02:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 208 states have (on average 1.0769230769230769) internal successors, (224), 215 states have internal predecessors, (224), 71 states have call successors, (71), 14 states have call predecessors, (71), 13 states have return successors, (70), 63 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-20 12:02:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 365 transitions. [2024-09-20 12:02:57,733 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 365 transitions. Word has length 118 [2024-09-20 12:02:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:02:57,733 INFO L474 AbstractCegarLoop]: Abstraction has 293 states and 365 transitions. [2024-09-20 12:02:57,734 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-20 12:02:57,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 365 transitions. [2024-09-20 12:02:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-20 12:02:57,735 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:02:57,736 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:02:57,751 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 12:02:57,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:57,936 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:02:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:02:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash -327161530, now seen corresponding path program 19 times [2024-09-20 12:02:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:02:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129141039] [2024-09-20 12:02:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:02:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:02:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:02:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 12:02:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:02:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 12:02:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 12:02:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 12:02:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:02:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-20 12:02:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-20 12:02:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 12:02:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-20 12:02:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 12:02:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-20 12:02:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-20 12:02:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-20 12:02:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 275 proven. 174 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-20 12:02:59,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:02:59,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129141039] [2024-09-20 12:02:59,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129141039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:02:59,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963610684] [2024-09-20 12:02:59,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:02:59,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:02:59,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:02:59,437 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) [2024-09-20 12:02:59,437 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 12:02:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:02:59,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-20 12:02:59,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:03:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-20 12:03:00,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:03:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-20 12:03:02,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963610684] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:03:02,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:03:02,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 86 [2024-09-20 12:03:02,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813338448] [2024-09-20 12:03:02,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:03:02,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-20 12:03:02,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:03:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-20 12:03:02,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=6287, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 12:03:02,305 INFO L87 Difference]: Start difference. First operand 293 states and 365 transitions. Second operand has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-20 12:03:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:03:06,356 INFO L93 Difference]: Finished difference Result 433 states and 526 transitions. [2024-09-20 12:03:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-20 12:03:06,356 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 126 [2024-09-20 12:03:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:03:06,359 INFO L225 Difference]: With dead ends: 433 [2024-09-20 12:03:06,359 INFO L226 Difference]: Without dead ends: 342 [2024-09-20 12:03:06,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2163, Invalid=12117, Unknown=0, NotChecked=0, Total=14280 [2024-09-20 12:03:06,360 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:03:06,361 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 886 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 12:03:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-20 12:03:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2024-09-20 12:03:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 241 states have (on average 1.070539419087137) internal successors, (258), 248 states have internal predecessors, (258), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (84), 77 states have call predecessors, (84), 84 states have call successors, (84) [2024-09-20 12:03:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 427 transitions. [2024-09-20 12:03:06,452 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 427 transitions. Word has length 126 [2024-09-20 12:03:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:03:06,452 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 427 transitions. [2024-09-20 12:03:06,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-20 12:03:06,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 427 transitions. [2024-09-20 12:03:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-09-20 12:03:06,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:03:06,454 INFO L216 NwaCegarLoop]: trace histogram [27, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:03:06,471 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 12:03:06,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 12:03:06,655 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:03:06,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1728201798, now seen corresponding path program 20 times [2024-09-20 12:03:06,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:03:06,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943916420] [2024-09-20 12:03:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:03:06,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:03:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:03:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 12:03:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 12:03:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 12:03:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 12:03:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:03:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 12:03:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-20 12:03:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:03:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-20 12:03:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 12:03:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 12:03:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-20 12:03:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 349 proven. 275 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 12:03:07,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:03:07,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943916420] [2024-09-20 12:03:07,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943916420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:03:07,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963797987] [2024-09-20 12:03:07,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:03:07,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:03:07,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:03:07,691 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) [2024-09-20 12:03:07,692 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 12:03:07,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:03:07,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:03:07,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-20 12:03:07,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:03:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 12:03:08,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:03:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 12:03:10,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963797987] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:03:10,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:03:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 113 [2024-09-20 12:03:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265300047] [2024-09-20 12:03:10,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:03:10,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-09-20 12:03:10,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:03:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-09-20 12:03:10,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2594, Invalid=10062, Unknown=0, NotChecked=0, Total=12656 [2024-09-20 12:03:10,052 INFO L87 Difference]: Start difference. First operand 341 states and 427 transitions. Second operand has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 12:03:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:03:11,431 INFO L93 Difference]: Finished difference Result 762 states and 985 transitions. [2024-09-20 12:03:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-20 12:03:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 124 [2024-09-20 12:03:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:03:11,437 INFO L225 Difference]: With dead ends: 762 [2024-09-20 12:03:11,437 INFO L226 Difference]: Without dead ends: 760 [2024-09-20 12:03:11,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4040, Invalid=15420, Unknown=0, NotChecked=0, Total=19460 [2024-09-20 12:03:11,439 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 49 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:03:11,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1086 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:03:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-20 12:03:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 759. [2024-09-20 12:03:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 520 states have (on average 1.0326923076923078) internal successors, (537), 534 states have internal predecessors, (537), 223 states have call successors, (223), 16 states have call predecessors, (223), 15 states have return successors, (222), 208 states have call predecessors, (222), 222 states have call successors, (222) [2024-09-20 12:03:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 982 transitions. [2024-09-20 12:03:11,610 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 982 transitions. Word has length 124 [2024-09-20 12:03:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:03:11,610 INFO L474 AbstractCegarLoop]: Abstraction has 759 states and 982 transitions. [2024-09-20 12:03:11,610 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 12:03:11,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 982 transitions. [2024-09-20 12:03:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-20 12:03:11,614 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:03:11,614 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:03:11,632 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 12:03:11,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 12:03:11,819 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:03:11,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1782177000, now seen corresponding path program 21 times [2024-09-20 12:03:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:03:11,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516295236] [2024-09-20 12:03:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:03:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:03:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:03:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:03:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:03:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:03:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:03:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 12:03:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 12:03:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 12:03:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 12:03:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 12:03:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-20 12:03:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 12:03:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-20 12:03:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-20 12:03:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-20 12:03:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-20 12:03:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 317 proven. 194 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:03:13,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:03:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516295236] [2024-09-20 12:03:13,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516295236] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:03:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807248772] [2024-09-20 12:03:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:03:13,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:03:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:03:13,546 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) [2024-09-20 12:03:13,548 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 12:03:13,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-20 12:03:13,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:03:13,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-20 12:03:13,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:03:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:03:15,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:03:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:03:17,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807248772] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:03:17,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:03:17,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 107 [2024-09-20 12:03:17,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188888690] [2024-09-20 12:03:17,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:03:17,628 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-09-20 12:03:17,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:03:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-09-20 12:03:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=10042, Unknown=0, NotChecked=0, Total=11342 [2024-09-20 12:03:17,630 INFO L87 Difference]: Start difference. First operand 759 states and 982 transitions. Second operand has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-20 12:03:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:03:21,902 INFO L93 Difference]: Finished difference Result 812 states and 1026 transitions. [2024-09-20 12:03:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-20 12:03:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 134 [2024-09-20 12:03:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:03:21,909 INFO L225 Difference]: With dead ends: 812 [2024-09-20 12:03:21,909 INFO L226 Difference]: Without dead ends: 710 [2024-09-20 12:03:21,912 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2595, Invalid=20661, Unknown=0, NotChecked=0, Total=23256 [2024-09-20 12:03:21,913 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:03:21,913 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 621 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:03:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2024-09-20 12:03:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2024-09-20 12:03:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 487 states have (on average 1.0328542094455853) internal successors, (503), 500 states have internal predecessors, (503), 208 states have call successors, (208), 15 states have call predecessors, (208), 14 states have return successors, (207), 194 states have call predecessors, (207), 207 states have call successors, (207) [2024-09-20 12:03:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 918 transitions. [2024-09-20 12:03:22,120 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 918 transitions. Word has length 134 [2024-09-20 12:03:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:03:22,120 INFO L474 AbstractCegarLoop]: Abstraction has 710 states and 918 transitions. [2024-09-20 12:03:22,121 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-20 12:03:22,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 918 transitions. [2024-09-20 12:03:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 12:03:22,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:03:22,125 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:03:22,143 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 12:03:22,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 12:03:22,329 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:03:22,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1880897274, now seen corresponding path program 22 times [2024-09-20 12:03:22,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:03:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112501421] [2024-09-20 12:03:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:03:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:03:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:03:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:03:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:03:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 12:03:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:03:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 12:03:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 12:03:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:03:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 12:03:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-20 12:03:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 12:03:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-20 12:03:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-20 12:03:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-20 12:03:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-20 12:03:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-20 12:03:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-20 12:03:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 362 proven. 215 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 12:03:23,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:03:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112501421] [2024-09-20 12:03:23,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112501421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:03:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557031959] [2024-09-20 12:03:23,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:03:23,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:03:23,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:03:23,986 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) [2024-09-20 12:03:23,989 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 12:03:24,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:03:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:03:24,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-20 12:03:24,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:03:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 12:03:25,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:03:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 12:03:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557031959] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:03:27,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:03:27,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 96 [2024-09-20 12:03:27,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705753774] [2024-09-20 12:03:27,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:03:27,604 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-09-20 12:03:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:03:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-09-20 12:03:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=7846, Unknown=0, NotChecked=0, Total=9120 [2024-09-20 12:03:27,606 INFO L87 Difference]: Start difference. First operand 710 states and 918 transitions. Second operand has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-20 12:03:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:03:33,244 INFO L93 Difference]: Finished difference Result 889 states and 1127 transitions. [2024-09-20 12:03:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-09-20 12:03:33,245 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Word has length 142 [2024-09-20 12:03:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:03:33,251 INFO L225 Difference]: With dead ends: 889 [2024-09-20 12:03:33,252 INFO L226 Difference]: Without dead ends: 788 [2024-09-20 12:03:33,255 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2715, Invalid=15107, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 12:03:33,255 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 3929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:03:33,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1023 Invalid, 3929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3766 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-20 12:03:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2024-09-20 12:03:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 778. [2024-09-20 12:03:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 534 states have (on average 1.0355805243445693) internal successors, (553), 547 states have internal predecessors, (553), 228 states have call successors, (228), 16 states have call predecessors, (228), 15 states have return successors, (227), 214 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-20 12:03:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1008 transitions. [2024-09-20 12:03:33,516 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1008 transitions. Word has length 142 [2024-09-20 12:03:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:03:33,517 INFO L474 AbstractCegarLoop]: Abstraction has 778 states and 1008 transitions. [2024-09-20 12:03:33,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-20 12:03:33,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1008 transitions. [2024-09-20 12:03:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-20 12:03:33,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:03:33,522 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:03:33,541 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-20 12:03:33,722 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 12:03:33,722 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:03:33,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1580304088, now seen corresponding path program 23 times [2024-09-20 12:03:33,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:03:33,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329042802] [2024-09-20 12:03:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:03:33,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:03:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:03:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:03:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:03:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:03:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 12:03:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 12:03:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 12:03:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 12:03:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:03:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-20 12:03:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-20 12:03:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-20 12:03:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-20 12:03:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 12:03:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-20 12:03:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-20 12:03:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-20 12:03:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-20 12:03:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 410 proven. 237 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-20 12:03:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:03:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329042802] [2024-09-20 12:03:35,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329042802] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:03:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234813058] [2024-09-20 12:03:35,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:03:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:03:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:03:35,430 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) [2024-09-20 12:03:35,431 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 12:03:35,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-20 12:03:35,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:03:35,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-09-20 12:03:35,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:03:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-20 12:03:37,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:03:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-20 12:03:40,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234813058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:03:40,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:03:40,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2024-09-20 12:03:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639526030] [2024-09-20 12:03:40,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:03:40,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-20 12:03:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:03:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-20 12:03:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=12916, Unknown=0, NotChecked=0, Total=14762 [2024-09-20 12:03:40,603 INFO L87 Difference]: Start difference. First operand 778 states and 1008 transitions. Second operand has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-20 12:03:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:03:48,890 INFO L93 Difference]: Finished difference Result 915 states and 1163 transitions. [2024-09-20 12:03:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-09-20 12:03:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Word has length 150 [2024-09-20 12:03:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:03:48,897 INFO L225 Difference]: With dead ends: 915 [2024-09-20 12:03:48,897 INFO L226 Difference]: Without dead ends: 807 [2024-09-20 12:03:48,901 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10129 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4440, Invalid=27780, Unknown=0, NotChecked=0, Total=32220 [2024-09-20 12:03:48,901 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:03:48,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1064 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-20 12:03:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2024-09-20 12:03:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2024-09-20 12:03:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 554 states have (on average 1.036101083032491) internal successors, (574), 567 states have internal predecessors, (574), 237 states have call successors, (237), 16 states have call predecessors, (237), 15 states have return successors, (236), 223 states have call predecessors, (236), 236 states have call successors, (236) [2024-09-20 12:03:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1047 transitions. [2024-09-20 12:03:49,167 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1047 transitions. Word has length 150 [2024-09-20 12:03:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:03:49,168 INFO L474 AbstractCegarLoop]: Abstraction has 807 states and 1047 transitions. [2024-09-20 12:03:49,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-20 12:03:49,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1047 transitions. [2024-09-20 12:03:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-09-20 12:03:49,173 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:03:49,174 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:03:49,194 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-20 12:03:49,374 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:03:49,375 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:03:49,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:03:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1176594234, now seen corresponding path program 24 times [2024-09-20 12:03:49,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:03:49,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529206480] [2024-09-20 12:03:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:03:49,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:03:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:03:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:03:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:03:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:03:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 12:03:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:03:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:03:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 12:03:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 12:03:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 12:03:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-20 12:03:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 12:03:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-20 12:03:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-20 12:03:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-20 12:03:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-20 12:03:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-20 12:03:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-20 12:03:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-09-20 12:03:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:03:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 461 proven. 260 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-20 12:03:51,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:03:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529206480] [2024-09-20 12:03:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529206480] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:03:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928347159] [2024-09-20 12:03:51,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:03:51,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:03:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:03:51,174 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) [2024-09-20 12:03:51,175 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 12:03:51,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-20 12:03:51,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:03:51,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-20 12:03:51,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:03:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-20 12:03:52,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:03:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-20 12:03:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928347159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:03:55,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:03:55,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 106 [2024-09-20 12:03:55,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534400442] [2024-09-20 12:03:55,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:03:55,308 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-09-20 12:03:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:03:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-09-20 12:03:55,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1553, Invalid=9577, Unknown=0, NotChecked=0, Total=11130 [2024-09-20 12:03:55,310 INFO L87 Difference]: Start difference. First operand 807 states and 1047 transitions. Second operand has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-20 12:04:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:04:02,287 INFO L93 Difference]: Finished difference Result 956 states and 1213 transitions. [2024-09-20 12:04:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-20 12:04:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Word has length 158 [2024-09-20 12:04:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:04:02,295 INFO L225 Difference]: With dead ends: 956 [2024-09-20 12:04:02,295 INFO L226 Difference]: Without dead ends: 845 [2024-09-20 12:04:02,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3331, Invalid=18425, Unknown=0, NotChecked=0, Total=21756 [2024-09-20 12:04:02,299 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:04:02,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1352 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-20 12:04:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2024-09-20 12:04:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 837. [2024-09-20 12:04:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 575 states have (on average 1.0365217391304349) internal successors, (596), 588 states have internal predecessors, (596), 245 states have call successors, (245), 17 states have call predecessors, (245), 16 states have return successors, (244), 231 states have call predecessors, (244), 244 states have call successors, (244) [2024-09-20 12:04:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1085 transitions. [2024-09-20 12:04:02,601 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1085 transitions. Word has length 158 [2024-09-20 12:04:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:04:02,601 INFO L474 AbstractCegarLoop]: Abstraction has 837 states and 1085 transitions. [2024-09-20 12:04:02,602 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-20 12:04:02,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1085 transitions. [2024-09-20 12:04:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-20 12:04:02,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:04:02,608 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:04:02,627 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-20 12:04:02,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 12:04:02,809 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:04:02,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash -902421144, now seen corresponding path program 25 times [2024-09-20 12:04:02,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:04:02,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385008508] [2024-09-20 12:04:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:04:02,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:04:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:04:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:04:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 12:04:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 12:04:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 12:04:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 12:04:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:04:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 12:04:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-20 12:04:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:04:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-20 12:04:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 12:04:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 12:04:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-20 12:04:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-09-20 12:04:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-09-20 12:04:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-09-20 12:04:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-20 12:04:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2024-09-20 12:04:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-09-20 12:04:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 515 proven. 284 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-20 12:04:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:04:04,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385008508] [2024-09-20 12:04:04,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385008508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:04:04,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570814564] [2024-09-20 12:04:04,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:04:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:04:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:04:04,817 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) [2024-09-20 12:04:04,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 12:04:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:04,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-20 12:04:04,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:04:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-20 12:04:06,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:04:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-20 12:04:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570814564] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:04:09,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:04:09,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 111 [2024-09-20 12:04:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157050809] [2024-09-20 12:04:09,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:04:09,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-20 12:04:09,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:04:09,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-20 12:04:09,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1703, Invalid=10507, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 12:04:09,419 INFO L87 Difference]: Start difference. First operand 837 states and 1085 transitions. Second operand has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-20 12:04:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:04:17,044 INFO L93 Difference]: Finished difference Result 989 states and 1253 transitions. [2024-09-20 12:04:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-20 12:04:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Word has length 166 [2024-09-20 12:04:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:04:17,051 INFO L225 Difference]: With dead ends: 989 [2024-09-20 12:04:17,052 INFO L226 Difference]: Without dead ends: 871 [2024-09-20 12:04:17,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6357 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3663, Invalid=20207, Unknown=0, NotChecked=0, Total=23870 [2024-09-20 12:04:17,055 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 4709 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:04:17,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1220 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4709 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-20 12:04:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2024-09-20 12:04:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 864. [2024-09-20 12:04:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 594 states have (on average 1.037037037037037) internal successors, (616), 607 states have internal predecessors, (616), 252 states have call successors, (252), 18 states have call predecessors, (252), 17 states have return successors, (251), 238 states have call predecessors, (251), 251 states have call successors, (251) [2024-09-20 12:04:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1119 transitions. [2024-09-20 12:04:17,376 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1119 transitions. Word has length 166 [2024-09-20 12:04:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:04:17,376 INFO L474 AbstractCegarLoop]: Abstraction has 864 states and 1119 transitions. [2024-09-20 12:04:17,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-20 12:04:17,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1119 transitions. [2024-09-20 12:04:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-09-20 12:04:17,381 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:04:17,381 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:04:17,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-20 12:04:17,585 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 12:04:17,586 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:04:17,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1015830662, now seen corresponding path program 26 times [2024-09-20 12:04:17,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:04:17,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669173523] [2024-09-20 12:04:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:04:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:04:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:04:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:04:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:04:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 12:04:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:04:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-20 12:04:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-20 12:04:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 12:04:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-20 12:04:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-20 12:04:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 12:04:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-20 12:04:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-20 12:04:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-20 12:04:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-20 12:04:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2024-09-20 12:04:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2024-09-20 12:04:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2024-09-20 12:04:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-09-20 12:04:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-20 12:04:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-09-20 12:04:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 572 proven. 309 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-20 12:04:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:04:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669173523] [2024-09-20 12:04:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669173523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:04:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063788463] [2024-09-20 12:04:19,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:04:19,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:04:19,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:04:19,678 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) [2024-09-20 12:04:19,679 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 12:04:19,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:04:19,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:04:19,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-20 12:04:19,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:04:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-20 12:04:21,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:04:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-20 12:04:24,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063788463] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:04:24,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:04:24,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 116 [2024-09-20 12:04:24,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635653993] [2024-09-20 12:04:24,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:04:24,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-20 12:04:24,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:04:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-20 12:04:24,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1860, Invalid=11480, Unknown=0, NotChecked=0, Total=13340 [2024-09-20 12:04:24,523 INFO L87 Difference]: Start difference. First operand 864 states and 1119 transitions. Second operand has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-20 12:04:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:04:32,720 INFO L93 Difference]: Finished difference Result 1019 states and 1289 transitions. [2024-09-20 12:04:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-20 12:04:32,721 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Word has length 174 [2024-09-20 12:04:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:04:32,726 INFO L225 Difference]: With dead ends: 1019 [2024-09-20 12:04:32,726 INFO L226 Difference]: Without dead ends: 894 [2024-09-20 12:04:32,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6957 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=4011, Invalid=22071, Unknown=0, NotChecked=0, Total=26082 [2024-09-20 12:04:32,728 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 4929 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 5147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:04:32,729 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1344 Invalid, 5147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4929 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-20 12:04:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2024-09-20 12:04:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 888. [2024-09-20 12:04:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 611 states have (on average 1.0376432078559739) internal successors, (634), 624 states have internal predecessors, (634), 258 states have call successors, (258), 19 states have call predecessors, (258), 18 states have return successors, (257), 244 states have call predecessors, (257), 257 states have call successors, (257) [2024-09-20 12:04:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1149 transitions. [2024-09-20 12:04:33,089 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1149 transitions. Word has length 174 [2024-09-20 12:04:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:04:33,089 INFO L474 AbstractCegarLoop]: Abstraction has 888 states and 1149 transitions. [2024-09-20 12:04:33,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-20 12:04:33,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1149 transitions. [2024-09-20 12:04:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-20 12:04:33,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:04:33,093 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:04:33,112 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-20 12:04:33,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:04:33,294 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:04:33,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1982537304, now seen corresponding path program 27 times [2024-09-20 12:04:33,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:04:33,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142852582] [2024-09-20 12:04:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:04:33,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:04:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:04:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:04:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 12:04:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 12:04:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 12:04:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:04:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-20 12:04:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-20 12:04:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 12:04:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-20 12:04:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 12:04:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-20 12:04:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-20 12:04:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-20 12:04:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-09-20 12:04:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2024-09-20 12:04:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-20 12:04:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-09-20 12:04:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2024-09-20 12:04:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-09-20 12:04:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2024-09-20 12:04:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-09-20 12:04:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 632 proven. 335 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-20 12:04:35,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:04:35,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142852582] [2024-09-20 12:04:35,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142852582] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:04:35,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055171873] [2024-09-20 12:04:35,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:04:35,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:04:35,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:04:35,525 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) [2024-09-20 12:04:35,526 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 12:04:35,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-20 12:04:35,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:04:35,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-20 12:04:35,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:04:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-20 12:04:37,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:04:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-20 12:04:40,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055171873] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:04:40,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:04:40,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 121 [2024-09-20 12:04:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013589607] [2024-09-20 12:04:40,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:04:40,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-09-20 12:04:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:04:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-09-20 12:04:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=12496, Unknown=0, NotChecked=0, Total=14520 [2024-09-20 12:04:40,813 INFO L87 Difference]: Start difference. First operand 888 states and 1149 transitions. Second operand has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-20 12:04:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:04:49,984 INFO L93 Difference]: Finished difference Result 1042 states and 1318 transitions. [2024-09-20 12:04:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-09-20 12:04:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Word has length 182 [2024-09-20 12:04:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:04:49,990 INFO L225 Difference]: With dead ends: 1042 [2024-09-20 12:04:49,990 INFO L226 Difference]: Without dead ends: 910 [2024-09-20 12:04:49,993 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=4375, Invalid=24017, Unknown=0, NotChecked=0, Total=28392 [2024-09-20 12:04:49,994 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 5629 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 5868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 5629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:04:49,994 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1452 Invalid, 5868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 5629 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-20 12:04:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2024-09-20 12:04:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 905. [2024-09-20 12:04:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 623 states have (on average 1.0385232744783306) internal successors, (647), 636 states have internal predecessors, (647), 263 states have call successors, (263), 19 states have call predecessors, (263), 18 states have return successors, (262), 249 states have call predecessors, (262), 262 states have call successors, (262) [2024-09-20 12:04:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1172 transitions. [2024-09-20 12:04:50,274 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1172 transitions. Word has length 182 [2024-09-20 12:04:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:04:50,274 INFO L474 AbstractCegarLoop]: Abstraction has 905 states and 1172 transitions. [2024-09-20 12:04:50,275 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-20 12:04:50,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1172 transitions. [2024-09-20 12:04:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-09-20 12:04:50,280 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:04:50,280 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:04:50,300 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-20 12:04:50,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-20 12:04:50,480 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:04:50,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:04:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash 151586886, now seen corresponding path program 28 times [2024-09-20 12:04:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:04:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371455808] [2024-09-20 12:04:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:04:50,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:04:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:04:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:04:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:04:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:04:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 12:04:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 12:04:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 12:04:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 12:04:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 12:04:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-20 12:04:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 12:04:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-20 12:04:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-20 12:04:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-20 12:04:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-20 12:04:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2024-09-20 12:04:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2024-09-20 12:04:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2024-09-20 12:04:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2024-09-20 12:04:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2024-09-20 12:04:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2024-09-20 12:04:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2024-09-20 12:04:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-09-20 12:04:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:04:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 695 proven. 362 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-20 12:04:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:04:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371455808] [2024-09-20 12:04:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371455808] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:04:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260236420] [2024-09-20 12:04:52,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:04:52,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:04:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:04:52,924 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) [2024-09-20 12:04:52,924 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 12:04:53,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:04:53,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:04:53,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-20 12:04:53,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:04:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-20 12:04:54,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:04:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-20 12:04:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260236420] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:04:58,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:04:58,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 126 [2024-09-20 12:04:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094359473] [2024-09-20 12:04:58,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:04:58,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-09-20 12:04:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:04:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-09-20 12:04:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=13555, Unknown=0, NotChecked=0, Total=15750 [2024-09-20 12:04:58,459 INFO L87 Difference]: Start difference. First operand 905 states and 1172 transitions. Second operand has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-20 12:05:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:05:08,602 INFO L93 Difference]: Finished difference Result 1062 states and 1343 transitions. [2024-09-20 12:05:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-09-20 12:05:08,603 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Word has length 190 [2024-09-20 12:05:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:05:08,607 INFO L225 Difference]: With dead ends: 1062 [2024-09-20 12:05:08,608 INFO L226 Difference]: Without dead ends: 927 [2024-09-20 12:05:08,610 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8138 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4755, Invalid=26045, Unknown=0, NotChecked=0, Total=30800 [2024-09-20 12:05:08,610 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 6096 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 6379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 6096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:05:08,610 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1649 Invalid, 6379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 6096 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-20 12:05:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-09-20 12:05:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2024-09-20 12:05:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 636 states have (on average 1.0393081761006289) internal successors, (661), 649 states have internal predecessors, (661), 267 states have call successors, (267), 20 states have call predecessors, (267), 19 states have return successors, (266), 253 states have call predecessors, (266), 266 states have call successors, (266) [2024-09-20 12:05:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1194 transitions. [2024-09-20 12:05:08,911 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1194 transitions. Word has length 190 [2024-09-20 12:05:08,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:05:08,912 INFO L474 AbstractCegarLoop]: Abstraction has 923 states and 1194 transitions. [2024-09-20 12:05:08,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-20 12:05:08,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:05:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1194 transitions. [2024-09-20 12:05:08,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-09-20 12:05:08,916 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:05:08,916 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:05:08,930 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-20 12:05:09,116 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:05:09,116 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:05:09,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:05:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2012303896, now seen corresponding path program 29 times [2024-09-20 12:05:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:05:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390946959] [2024-09-20 12:05:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:05:09,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:05:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:05:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:05:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 12:05:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:05:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 12:05:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 12:05:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:05:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 12:05:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-20 12:05:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 12:05:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-20 12:05:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-20 12:05:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-20 12:05:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-20 12:05:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-20 12:05:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-20 12:05:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2024-09-20 12:05:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-20 12:05:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-09-20 12:05:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2024-09-20 12:05:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-09-20 12:05:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2024-09-20 12:05:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-20 12:05:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2024-09-20 12:05:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 761 proven. 390 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-20 12:05:11,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:05:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390946959] [2024-09-20 12:05:11,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390946959] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:05:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299075402] [2024-09-20 12:05:11,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:05:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:05:11,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:05:11,767 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) [2024-09-20 12:05:11,768 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-20 12:05:11,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-20 12:05:11,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:05:11,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-20 12:05:11,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:05:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-20 12:05:13,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:05:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-20 12:05:17,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299075402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:05:17,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:05:17,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 131 [2024-09-20 12:05:17,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434853695] [2024-09-20 12:05:17,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:05:17,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-09-20 12:05:17,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:05:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-09-20 12:05:17,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2373, Invalid=14657, Unknown=0, NotChecked=0, Total=17030 [2024-09-20 12:05:17,845 INFO L87 Difference]: Start difference. First operand 923 states and 1194 transitions. Second operand has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-20 12:05:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:05:28,849 INFO L93 Difference]: Finished difference Result 1083 states and 1367 transitions. [2024-09-20 12:05:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-20 12:05:28,850 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) Word has length 198 [2024-09-20 12:05:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:05:28,854 INFO L225 Difference]: With dead ends: 1083 [2024-09-20 12:05:28,854 INFO L226 Difference]: Without dead ends: 941 [2024-09-20 12:05:28,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 366 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8919 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5151, Invalid=28155, Unknown=0, NotChecked=0, Total=33306 [2024-09-20 12:05:28,857 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 6396 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 6704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 6396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:05:28,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1674 Invalid, 6704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 6396 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-20 12:05:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2024-09-20 12:05:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 938. [2024-09-20 12:05:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 647 states have (on average 1.0401854714064915) internal successors, (673), 660 states have internal predecessors, (673), 270 states have call successors, (270), 21 states have call predecessors, (270), 20 states have return successors, (269), 256 states have call predecessors, (269), 269 states have call successors, (269) [2024-09-20 12:05:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1212 transitions. [2024-09-20 12:05:29,163 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1212 transitions. Word has length 198 [2024-09-20 12:05:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:05:29,164 INFO L474 AbstractCegarLoop]: Abstraction has 938 states and 1212 transitions. [2024-09-20 12:05:29,164 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-20 12:05:29,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:05:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1212 transitions. [2024-09-20 12:05:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-09-20 12:05:29,168 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:05:29,169 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:05:29,193 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-20 12:05:29,369 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 12:05:29,370 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:05:29,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:05:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash -277829626, now seen corresponding path program 30 times [2024-09-20 12:05:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:05:29,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113197422] [2024-09-20 12:05:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:05:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:05:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:05:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:05:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:05:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 12:05:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 12:05:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 12:05:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 12:05:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:05:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-20 12:05:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-20 12:05:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-20 12:05:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-20 12:05:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 12:05:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-20 12:05:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-20 12:05:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-20 12:05:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-20 12:05:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-20 12:05:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-09-20 12:05:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-20 12:05:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-09-20 12:05:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2024-09-20 12:05:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-09-20 12:05:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2024-09-20 12:05:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2024-09-20 12:05:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:05:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 830 proven. 419 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-20 12:05:32,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:05:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113197422] [2024-09-20 12:05:32,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113197422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:05:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891896649] [2024-09-20 12:05:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:05:32,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:05:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:05:32,175 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) [2024-09-20 12:05:32,176 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-20 12:05:32,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-09-20 12:05:32,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:05:32,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-20 12:05:32,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:05:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-20 12:05:35,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:05:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-20 12:05:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891896649] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:05:40,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:05:40,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 161 [2024-09-20 12:05:40,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106422122] [2024-09-20 12:05:40,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:05:40,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2024-09-20 12:05:40,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:05:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2024-09-20 12:05:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=22849, Unknown=0, NotChecked=0, Total=25760 [2024-09-20 12:05:40,560 INFO L87 Difference]: Start difference. First operand 938 states and 1212 transitions. Second operand has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73)