./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/loops-crafted-1/mono-crafted_8.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd --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 12:11:10,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:11:10,423 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:11:10,428 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:11:10,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:11:10,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:11:10,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:11:10,456 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:11:10,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:11:10,458 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:11:10,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:11:10,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:11:10,459 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:11:10,459 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:11:10,460 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:11:10,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:11:10,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:11:10,461 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:11:10,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:11:10,461 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:11:10,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:11:10,462 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:11:10,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:11:10,462 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:11:10,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:11:10,463 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:11:10,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:11:10,463 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:11:10,463 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:11:10,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:11:10,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:11:10,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:11:10,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:11:10,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:11:10,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:11:10,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:11:10,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:11:10,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:11:10,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:11:10,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:11:10,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:11:10,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:11:10,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1972ee33272415a52c6f0d8a1f799e9d488ad771872c0cf36a214b07ea597fd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:11:10,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:11:10,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:11:10,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:11:10,717 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:11:10,718 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:11:10,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2024-09-20 12:11:12,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:11:12,224 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:11:12,225 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2024-09-20 12:11:12,231 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1a72f9da3/0c1f3e146fa24dbb8d8e4bd284070cd8/FLAG9f2a54989 [2024-09-20 12:11:12,248 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1a72f9da3/0c1f3e146fa24dbb8d8e4bd284070cd8 [2024-09-20 12:11:12,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:11:12,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:11:12,253 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:11:12,253 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:11:12,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:11:12,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb01a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12, skipping insertion in model container [2024-09-20 12:11:12,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,278 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:11:12,407 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2024-09-20 12:11:12,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:11:12,431 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:11:12,440 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2024-09-20 12:11:12,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:11:12,455 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:11:12,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12 WrapperNode [2024-09-20 12:11:12,456 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:11:12,457 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:11:12,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:11:12,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:11:12,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,477 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:11:12,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:11:12,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:11:12,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:11:12,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:11:12,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,497 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 12:11:12,497 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,506 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,508 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,509 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:11:12,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:11:12,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:11:12,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:11:12,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (1/1) ... [2024-09-20 12:11:12,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:11:12,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:12,543 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 12:11:12,545 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 12:11:12,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:11:12,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:11:12,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:11:12,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:11:12,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:11:12,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:11:12,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:11:12,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:11:12,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:11:12,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:11:12,647 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:11:12,648 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:11:12,768 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-20 12:11:12,769 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:11:12,791 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:11:12,792 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 12:11:12,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:11:12 BoogieIcfgContainer [2024-09-20 12:11:12,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:11:12,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:11:12,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:11:12,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:11:12,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:11:12" (1/3) ... [2024-09-20 12:11:12,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ede9d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:11:12, skipping insertion in model container [2024-09-20 12:11:12,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:11:12" (2/3) ... [2024-09-20 12:11:12,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ede9d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:11:12, skipping insertion in model container [2024-09-20 12:11:12,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:11:12" (3/3) ... [2024-09-20 12:11:12,802 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2024-09-20 12:11:12,817 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:11:12,818 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:11:12,875 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:11:12,881 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;@50bc9895, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:11:12,881 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:11:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 12:11:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 12:11:12,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:12,896 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:12,897 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:12,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1710538099, now seen corresponding path program 1 times [2024-09-20 12:11:12,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:12,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618204429] [2024-09-20 12:11:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:12,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,030 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 12:11:13,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:13,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618204429] [2024-09-20 12:11:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618204429] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:13,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:11:13,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:11:13,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614221732] [2024-09-20 12:11:13,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:13,037 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:11:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:11:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:11:13,059 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 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 12:11:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:13,079 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-09-20 12:11:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:11:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 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 10 [2024-09-20 12:11:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:13,086 INFO L225 Difference]: With dead ends: 30 [2024-09-20 12:11:13,086 INFO L226 Difference]: Without dead ends: 13 [2024-09-20 12:11:13,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:11:13,091 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:13,092 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-20 12:11:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-20 12:11:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-09-20 12:11:13,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2024-09-20 12:11:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:13,121 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-09-20 12:11:13,121 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 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 12:11:13,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-09-20 12:11:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 12:11:13,123 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:13,123 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:13,123 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:11:13,123 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:13,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1720696830, now seen corresponding path program 1 times [2024-09-20 12:11:13,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:13,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314687560] [2024-09-20 12:11:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:13,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,390 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 12:11:13,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314687560] [2024-09-20 12:11:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314687560] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:13,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:11:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 12:11:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192952523] [2024-09-20 12:11:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:13,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 12:11:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 12:11:13,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:13,401 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 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 12:11:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:13,433 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-09-20 12:11:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:11:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 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 10 [2024-09-20 12:11:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:13,434 INFO L225 Difference]: With dead ends: 24 [2024-09-20 12:11:13,434 INFO L226 Difference]: Without dead ends: 16 [2024-09-20 12:11:13,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:11:13,438 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:13,438 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-20 12:11:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-09-20 12:11:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-09-20 12:11:13,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-09-20 12:11:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:13,443 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-09-20 12:11:13,444 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 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 12:11:13,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-09-20 12:11:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 12:11:13,445 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:13,446 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:13,446 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:11:13,447 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:13,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1696808404, now seen corresponding path program 1 times [2024-09-20 12:11:13,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:13,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795389102] [2024-09-20 12:11:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,685 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 12:11:13,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:13,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795389102] [2024-09-20 12:11:13,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795389102] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:13,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073492917] [2024-09-20 12:11:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:13,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:13,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:13,690 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 12:11:13,694 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 12:11:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:13,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 12:11:13,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:13,791 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 12:11:13,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:13,884 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 12:11:13,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073492917] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:13,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:13,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2024-09-20 12:11:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344253880] [2024-09-20 12:11:13,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:13,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:11:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:11:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:11:13,887 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 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 12:11:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:13,965 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-09-20 12:11:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:11:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 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 12:11:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:13,967 INFO L225 Difference]: With dead ends: 31 [2024-09-20 12:11:13,968 INFO L226 Difference]: Without dead ends: 23 [2024-09-20 12:11:13,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:11:13,970 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:13,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-20 12:11:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-20 12:11:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-20 12:11:13,983 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2024-09-20 12:11:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:13,983 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-20 12:11:13,983 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 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 12:11:13,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-20 12:11:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:11:13,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:13,986 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:14,006 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:11:14,188 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:14,189 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:14,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:14,190 INFO L85 PathProgramCache]: Analyzing trace with hash 177718978, now seen corresponding path program 1 times [2024-09-20 12:11:14,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:14,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321767997] [2024-09-20 12:11:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:14,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:14,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 12:11:14,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321767997] [2024-09-20 12:11:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321767997] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126612941] [2024-09-20 12:11:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:14,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:14,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:14,350 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 12:11:14,351 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 12:11:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:14,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:11:14,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:14,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:14,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126612941] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:14,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:14,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-09-20 12:11:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136735699] [2024-09-20 12:11:14,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:14,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:11:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:11:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:11:14,507 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:14,637 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-09-20 12:11:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 12:11:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 12:11:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:14,639 INFO L225 Difference]: With dead ends: 47 [2024-09-20 12:11:14,639 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 12:11:14,640 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-09-20 12:11:14,640 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:14,641 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 12:11:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-20 12:11:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-20 12:11:14,649 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2024-09-20 12:11:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:14,653 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-20 12:11:14,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:14,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-20 12:11:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:11:14,654 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:14,654 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:14,671 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 12:11:14,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:14,856 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:14,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1559699330, now seen corresponding path program 2 times [2024-09-20 12:11:14,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:14,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559036926] [2024-09-20 12:11:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:14,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:15,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559036926] [2024-09-20 12:11:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559036926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398832290] [2024-09-20 12:11:15,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:11:15,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:15,060 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 12:11:15,062 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 12:11:15,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:11:15,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:15,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 12:11:15,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:15,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:15,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398832290] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:15,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:15,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-09-20 12:11:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447044536] [2024-09-20 12:11:15,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:15,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 12:11:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 12:11:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:11:15,336 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:15,645 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-09-20 12:11:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 12:11:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 12:11:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:15,648 INFO L225 Difference]: With dead ends: 46 [2024-09-20 12:11:15,649 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 12:11:15,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:11:15,649 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:15,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 72 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:11:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 12:11:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-20 12:11:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-09-20 12:11:15,658 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2024-09-20 12:11:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:15,658 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-09-20 12:11:15,658 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:15,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-09-20 12:11:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:11:15,660 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:15,660 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:15,673 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 12:11:15,864 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:15,865 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:15,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash -254018046, now seen corresponding path program 2 times [2024-09-20 12:11:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:15,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337968151] [2024-09-20 12:11:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:16,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 12:11:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337968151] [2024-09-20 12:11:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337968151] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652925816] [2024-09-20 12:11:16,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:11:16,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:16,079 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 12:11:16,080 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 12:11:16,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:11:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:16,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:11:16,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 12:11:16,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 12:11:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652925816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:16,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:16,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-20 12:11:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002315642] [2024-09-20 12:11:16,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:16,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:11:16,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:11:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:11:16,367 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 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 12:11:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:17,416 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2024-09-20 12:11:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:11:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-20 12:11:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:17,417 INFO L225 Difference]: With dead ends: 77 [2024-09-20 12:11:17,418 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 12:11:17,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2024-09-20 12:11:17,420 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:17,420 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 79 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:11:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 12:11:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-09-20 12:11:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2024-09-20 12:11:17,438 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 40 [2024-09-20 12:11:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:17,439 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2024-09-20 12:11:17,439 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 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 12:11:17,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2024-09-20 12:11:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:11:17,440 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:17,440 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:17,454 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:11:17,645 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:17,645 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:17,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1127962306, now seen corresponding path program 3 times [2024-09-20 12:11:17,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:17,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220919867] [2024-09-20 12:11:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:17,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:17,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:17,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220919867] [2024-09-20 12:11:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220919867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:17,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819086279] [2024-09-20 12:11:17,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:11:17,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:17,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:17,958 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 12:11:17,959 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 12:11:17,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 12:11:17,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:17,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 12:11:17,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-20 12:11:18,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:11:18,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819086279] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:11:18,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:11:18,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2024-09-20 12:11:18,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605854233] [2024-09-20 12:11:18,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:11:18,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:11:18,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:11:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:11:18,095 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:18,144 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2024-09-20 12:11:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:11:18,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-20 12:11:18,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:18,146 INFO L225 Difference]: With dead ends: 76 [2024-09-20 12:11:18,146 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 12:11:18,146 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:11:18,147 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:18,147 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:11:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 12:11:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-09-20 12:11:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-09-20 12:11:18,167 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 40 [2024-09-20 12:11:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:18,168 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-09-20 12:11:18,168 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-09-20 12:11:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 12:11:18,169 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:18,169 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:18,182 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:11:18,369 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 12:11:18,370 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:18,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash -653386262, now seen corresponding path program 3 times [2024-09-20 12:11:18,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:18,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51611536] [2024-09-20 12:11:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:18,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:18,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:11:18,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51611536] [2024-09-20 12:11:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51611536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682519571] [2024-09-20 12:11:18,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:11:18,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:18,765 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 12:11:18,770 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 12:11:18,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:11:18,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:18,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:11:18,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-20 12:11:19,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-20 12:11:19,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682519571] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:19,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:19,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 32 [2024-09-20 12:11:19,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976558432] [2024-09-20 12:11:19,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:19,553 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 12:11:19,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:19,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 12:11:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:11:19,557 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:11:20,492 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-09-20 12:11:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:11:20,492 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2024-09-20 12:11:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:11:20,495 INFO L225 Difference]: With dead ends: 97 [2024-09-20 12:11:20,495 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 12:11:20,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=557, Invalid=2413, Unknown=0, NotChecked=0, Total=2970 [2024-09-20 12:11:20,499 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:11:20,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 43 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:11:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 12:11:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-20 12:11:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2024-09-20 12:11:20,520 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 67 [2024-09-20 12:11:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:11:20,522 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2024-09-20 12:11:20,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:20,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2024-09-20 12:11:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 12:11:20,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:11:20,524 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:11:20,537 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 12:11:20,725 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:20,725 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:11:20,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:11:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 982073386, now seen corresponding path program 4 times [2024-09-20 12:11:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:11:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993136777] [2024-09-20 12:11:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:11:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:11:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:21,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:11:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:11:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 289 proven. 610 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 12:11:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:11:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993136777] [2024-09-20 12:11:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993136777] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:11:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176843408] [2024-09-20 12:11:21,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:11:21,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:11:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:11:21,234 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 12:11:21,235 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 12:11:21,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:11:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:11:21,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:11:21,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:11:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:11:21,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:11:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:11:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176843408] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:11:22,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:11:22,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 47 [2024-09-20 12:11:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93456408] [2024-09-20 12:11:22,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:11:22,419 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 12:11:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:11:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 12:11:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=1544, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 12:11:22,421 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 2 states have call successors, (3), 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 12:12:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:12:26,828 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2024-09-20 12:12:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 12:12:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 2 states have call successors, (3), 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 85 [2024-09-20 12:12:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:12:26,831 INFO L225 Difference]: With dead ends: 180 [2024-09-20 12:12:26,832 INFO L226 Difference]: Without dead ends: 158 [2024-09-20 12:12:26,835 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=1605, Invalid=2951, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 12:12:26,836 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:12:26,836 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 164 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:12:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-09-20 12:12:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-09-20 12:12:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:12:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2024-09-20 12:12:26,876 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 85 [2024-09-20 12:12:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:12:26,877 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2024-09-20 12:12:26,877 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 2 states have call successors, (3), 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 12:12:26,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:12:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2024-09-20 12:12:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-09-20 12:12:26,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:12:26,884 INFO L216 NwaCegarLoop]: trace histogram [49, 49, 44, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:12:26,905 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 12:12:27,085 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:12:27,085 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:12:27,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:12:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2006408406, now seen corresponding path program 5 times [2024-09-20 12:12:27,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:12:27,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244295828] [2024-09-20 12:12:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:12:27,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:12:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:12:28,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:12:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:12:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 12:12:28,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:12:28,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244295828] [2024-09-20 12:12:28,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244295828] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:12:28,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110333509] [2024-09-20 12:12:28,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:12:28,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:12:28,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:12:28,486 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 12:12:28,487 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 12:12:29,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2024-09-20 12:12:29,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:12:29,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-20 12:12:29,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:12:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 12:12:29,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:12:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 625 proven. 2926 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 12:12:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110333509] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:12:33,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:12:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 48] total 94 [2024-09-20 12:12:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772755225] [2024-09-20 12:12:33,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:12:33,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-09-20 12:12:33,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:12:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-09-20 12:12:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2347, Invalid=6395, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 12:12:33,020 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 94 states, 94 states have (on average 2.9893617021276597) internal successors, (281), 94 states have internal predecessors, (281), 2 states have call successors, (3), 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 12:13:00,447 WARN L293 SmtUtils]: Spent 15.26s on a formula simplification. DAG size of input: 271 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:13:25,050 WARN L293 SmtUtils]: Spent 12.71s on a formula simplification. DAG size of input: 265 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:14:02,874 WARN L293 SmtUtils]: Spent 16.95s on a formula simplification. DAG size of input: 259 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:14:49,877 WARN L293 SmtUtils]: Spent 20.22s on a formula simplification. DAG size of input: 253 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:15:26,252 WARN L293 SmtUtils]: Spent 11.53s on a formula simplification. DAG size of input: 247 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)