./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd-ll.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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/nla-digbench/egcd-ll.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 5cf588c7d7521936f2238a5a4b8ed55e91050a69daa6016b5b2b4a486ef1b9f8 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:38:08,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:38:08,529 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:38:08,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:38:08,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:38:08,556 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:38:08,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:38:08,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:38:08,557 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:38:08,557 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:38:08,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:38:08,558 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:38:08,558 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:38:08,558 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:38:08,558 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:38:08,559 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:38:08,559 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:38:08,559 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:38:08,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:38:08,563 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:38:08,563 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:38:08,567 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:38:08,567 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:38:08,568 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:38:08,568 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:38:08,568 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:38:08,568 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:38:08,568 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:38:08,568 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:38:08,569 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:38:08,569 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:38:08,569 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:38:08,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:38:08,569 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:38:08,570 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:38:08,570 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:38:08,570 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:38:08,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:38:08,570 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:38:08,570 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:38:08,570 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:38:08,571 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:38:08,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cf588c7d7521936f2238a5a4b8ed55e91050a69daa6016b5b2b4a486ef1b9f8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:38:08,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:38:08,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:38:08,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:38:08,765 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:38:08,766 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:38:08,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd-ll.c [2024-09-11 19:38:09,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:38:10,072 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:38:10,073 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd-ll.c [2024-09-11 19:38:10,078 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/77b000f0b/f5bb94d93b434ea1a82264465238179f/FLAG646a4c98d [2024-09-11 19:38:10,087 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/77b000f0b/f5bb94d93b434ea1a82264465238179f [2024-09-11 19:38:10,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:38:10,090 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:38:10,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:38:10,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:38:10,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:38:10,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b330d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10, skipping insertion in model container [2024-09-11 19:38:10,096 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,109 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:38:10,222 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd-ll.c[489,502] [2024-09-11 19:38:10,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:38:10,251 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:38:10,261 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd-ll.c[489,502] [2024-09-11 19:38:10,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:38:10,284 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:38:10,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10 WrapperNode [2024-09-11 19:38:10,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:38:10,285 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:38:10,285 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:38:10,286 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:38:10,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,309 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2024-09-11 19:38:10,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:38:10,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:38:10,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:38:10,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:38:10,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,318 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,330 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]. [2024-09-11 19:38:10,330 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,332 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,335 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:38:10,337 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:38:10,338 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:38:10,338 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:38:10,339 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (1/1) ... [2024-09-11 19:38:10,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:38:10,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:10,363 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) [2024-09-11 19:38:10,366 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 [2024-09-11 19:38:10,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:38:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 19:38:10,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 19:38:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:38:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:38:10,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:38:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:38:10,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:38:10,453 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:38:10,455 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:38:10,586 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-11 19:38:10,587 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:38:10,609 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:38:10,609 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 19:38:10,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:38:10 BoogieIcfgContainer [2024-09-11 19:38:10,609 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:38:10,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:38:10,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:38:10,615 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:38:10,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:38:10" (1/3) ... [2024-09-11 19:38:10,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bd8d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:38:10, skipping insertion in model container [2024-09-11 19:38:10,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:38:10" (2/3) ... [2024-09-11 19:38:10,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bd8d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:38:10, skipping insertion in model container [2024-09-11 19:38:10,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:38:10" (3/3) ... [2024-09-11 19:38:10,618 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2024-09-11 19:38:10,646 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:38:10,647 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:38:10,710 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:38:10,717 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;@4ad0acdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:38:10,717 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:38:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 19:38:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-11 19:38:10,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:10,727 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:10,727 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:10,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1611530917, now seen corresponding path program 1 times [2024-09-11 19:38:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:10,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21037175] [2024-09-11 19:38:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:10,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:10,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:10,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:38:10,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21037175] [2024-09-11 19:38:10,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21037175] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:10,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:10,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:38:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593949094] [2024-09-11 19:38:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:10,872 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:38:10,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:10,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:38:10,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:38:10,893 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 19:38:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:10,912 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2024-09-11 19:38:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:38:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-11 19:38:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:10,918 INFO L225 Difference]: With dead ends: 50 [2024-09-11 19:38:10,918 INFO L226 Difference]: Without dead ends: 24 [2024-09-11 19:38:10,921 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:38:10,923 INFO L434 NwaCegarLoop]: 32 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, 32 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 [2024-09-11 19:38:10,923 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-11 19:38:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-11 19:38:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 19:38:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-09-11 19:38:10,952 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 17 [2024-09-11 19:38:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:10,953 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-09-11 19:38:10,953 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 19:38:10,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-09-11 19:38:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-11 19:38:10,954 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:10,955 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:10,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:38:10,955 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:10,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1282140333, now seen corresponding path program 1 times [2024-09-11 19:38:10,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:10,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22225039] [2024-09-11 19:38:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:10,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:11,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816212430] [2024-09-11 19:38:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:11,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:11,012 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) [2024-09-11 19:38:11,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:38:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:11,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:38:11,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:38:11,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:11,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22225039] [2024-09-11 19:38:11,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816212430] [2024-09-11 19:38:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816212430] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:11,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:11,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902975600] [2024-09-11 19:38:11,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:11,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:11,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:11,196 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:38:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:11,260 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-11 19:38:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:11,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-11 19:38:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:11,262 INFO L225 Difference]: With dead ends: 40 [2024-09-11 19:38:11,263 INFO L226 Difference]: Without dead ends: 38 [2024-09-11 19:38:11,263 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:38:11,264 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:11,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 94 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-11 19:38:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-09-11 19:38:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 19:38:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2024-09-11 19:38:11,275 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 17 [2024-09-11 19:38:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:11,275 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2024-09-11 19:38:11,275 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:38:11,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2024-09-11 19:38:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:38:11,277 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:11,277 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:11,289 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:38:11,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:11,481 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:11,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash -559479356, now seen corresponding path program 1 times [2024-09-11 19:38:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:11,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105835128] [2024-09-11 19:38:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:11,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:11,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052225544] [2024-09-11 19:38:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:11,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:11,525 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) [2024-09-11 19:38:11,526 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:38:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:11,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:38:11,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:38:11,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105835128] [2024-09-11 19:38:11,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052225544] [2024-09-11 19:38:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052225544] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774686475] [2024-09-11 19:38:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:11,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:11,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:11,632 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 19:38:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:11,688 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-09-11 19:38:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-11 19:38:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:11,691 INFO L225 Difference]: With dead ends: 44 [2024-09-11 19:38:11,691 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 19:38:11,691 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:38:11,692 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:11,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 19:38:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-09-11 19:38:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 19:38:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2024-09-11 19:38:11,701 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 22 [2024-09-11 19:38:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:11,701 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2024-09-11 19:38:11,705 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 19:38:11,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2024-09-11 19:38:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-11 19:38:11,706 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:11,706 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:11,718 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:38:11,910 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:11,910 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:11,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 489854669, now seen corresponding path program 1 times [2024-09-11 19:38:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:11,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787401557] [2024-09-11 19:38:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:11,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:11,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907289023] [2024-09-11 19:38:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:11,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:11,927 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) [2024-09-11 19:38:11,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:38:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:11,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:38:11,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:38:12,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:12,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787401557] [2024-09-11 19:38:12,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:12,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907289023] [2024-09-11 19:38:12,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907289023] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:12,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:12,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:12,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738301636] [2024-09-11 19:38:12,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:12,035 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:12,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:12,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:12,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:12,035 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:38:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:12,086 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2024-09-11 19:38:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-11 19:38:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:12,089 INFO L225 Difference]: With dead ends: 66 [2024-09-11 19:38:12,089 INFO L226 Difference]: Without dead ends: 62 [2024-09-11 19:38:12,089 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:38:12,090 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:12,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-11 19:38:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-09-11 19:38:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 26 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-11 19:38:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 88 transitions. [2024-09-11 19:38:12,102 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 88 transitions. Word has length 27 [2024-09-11 19:38:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:12,103 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 88 transitions. [2024-09-11 19:38:12,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:38:12,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 88 transitions. [2024-09-11 19:38:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 19:38:12,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:12,108 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:12,121 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 19:38:12,312 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:12,313 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:12,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1209005526, now seen corresponding path program 1 times [2024-09-11 19:38:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:12,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195374207] [2024-09-11 19:38:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:12,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:12,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:12,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:12,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 19:38:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:12,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:38:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:12,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:38:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 19:38:12,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:12,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195374207] [2024-09-11 19:38:12,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195374207] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:12,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:12,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:12,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255481876] [2024-09-11 19:38:12,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:12,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:12,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:12,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:12,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:12,475 INFO L87 Difference]: Start difference. First operand 62 states and 88 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-11 19:38:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:12,520 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2024-09-11 19:38:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-11 19:38:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:12,522 INFO L225 Difference]: With dead ends: 68 [2024-09-11 19:38:12,522 INFO L226 Difference]: Without dead ends: 66 [2024-09-11 19:38:12,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:38:12,523 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:12,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-11 19:38:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-11 19:38:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-11 19:38:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2024-09-11 19:38:12,543 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 33 [2024-09-11 19:38:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:12,543 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2024-09-11 19:38:12,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-11 19:38:12,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2024-09-11 19:38:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:38:12,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:12,545 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:12,545 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-11 19:38:12,545 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:12,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1728861241, now seen corresponding path program 1 times [2024-09-11 19:38:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:12,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677082774] [2024-09-11 19:38:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:12,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939304221] [2024-09-11 19:38:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:12,562 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) [2024-09-11 19:38:12,563 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:38:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:12,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:38:12,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 19:38:12,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:12,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:12,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677082774] [2024-09-11 19:38:12,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:12,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939304221] [2024-09-11 19:38:12,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939304221] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:12,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:38:12,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:38:12,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348800474] [2024-09-11 19:38:12,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:12,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:12,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:38:12,662 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:38:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:12,706 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2024-09-11 19:38:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2024-09-11 19:38:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:12,709 INFO L225 Difference]: With dead ends: 76 [2024-09-11 19:38:12,709 INFO L226 Difference]: Without dead ends: 73 [2024-09-11 19:38:12,709 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:38:12,710 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:12,710 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 97 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-11 19:38:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-11 19:38:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 42 states have internal predecessors, (48), 23 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-11 19:38:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-09-11 19:38:12,724 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 35 [2024-09-11 19:38:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:12,726 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-09-11 19:38:12,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:38:12,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-09-11 19:38:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:38:12,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:12,727 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:12,739 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:38:12,928 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 [2024-09-11 19:38:12,929 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:12,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 724865447, now seen corresponding path program 1 times [2024-09-11 19:38:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016620227] [2024-09-11 19:38:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 19:38:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:38:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:38:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 19:38:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 19:38:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016620227] [2024-09-11 19:38:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016620227] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133586176] [2024-09-11 19:38:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:13,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:13,177 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) [2024-09-11 19:38:13,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:38:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:13,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:38:13,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:38:13,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:38:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133586176] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:38:13,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:38:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-11 19:38:13,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872495542] [2024-09-11 19:38:13,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:13,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:38:13,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:38:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:38:13,321 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-11 19:38:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:13,398 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-09-11 19:38:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:38:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2024-09-11 19:38:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:13,401 INFO L225 Difference]: With dead ends: 84 [2024-09-11 19:38:13,401 INFO L226 Difference]: Without dead ends: 80 [2024-09-11 19:38:13,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:38:13,403 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:13,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 114 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-11 19:38:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-09-11 19:38:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 48 states have internal predecessors, (53), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-11 19:38:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-11 19:38:13,413 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 38 [2024-09-11 19:38:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:13,414 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-11 19:38:13,414 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-11 19:38:13,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-11 19:38:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 19:38:13,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:13,415 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:13,428 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:13,619 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 [2024-09-11 19:38:13,620 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:13,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1004479210, now seen corresponding path program 2 times [2024-09-11 19:38:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101857501] [2024-09-11 19:38:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:13,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353198070] [2024-09-11 19:38:13,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:38:13,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:13,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:13,631 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) [2024-09-11 19:38:13,632 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:38:13,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:38:13,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:38:13,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-11 19:38:13,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-11 19:38:13,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:38:13,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:13,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101857501] [2024-09-11 19:38:13,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:13,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353198070] [2024-09-11 19:38:13,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353198070] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:13,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:38:13,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2024-09-11 19:38:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639768131] [2024-09-11 19:38:13,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:13,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:38:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:38:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:38:13,991 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-11 19:38:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:14,334 INFO L93 Difference]: Finished difference Result 129 states and 177 transitions. [2024-09-11 19:38:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 19:38:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 40 [2024-09-11 19:38:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:14,336 INFO L225 Difference]: With dead ends: 129 [2024-09-11 19:38:14,336 INFO L226 Difference]: Without dead ends: 127 [2024-09-11 19:38:14,337 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:38:14,337 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:14,337 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 220 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:38:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-11 19:38:14,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2024-09-11 19:38:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 63 states have internal predecessors, (74), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-11 19:38:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2024-09-11 19:38:14,360 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 40 [2024-09-11 19:38:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:14,360 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2024-09-11 19:38:14,360 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-11 19:38:14,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2024-09-11 19:38:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-11 19:38:14,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:14,361 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:14,373 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:14,565 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 [2024-09-11 19:38:14,566 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:14,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:14,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1014989531, now seen corresponding path program 1 times [2024-09-11 19:38:14,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:14,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887079514] [2024-09-11 19:38:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:14,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:14,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205643522] [2024-09-11 19:38:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:14,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:14,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:14,582 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) [2024-09-11 19:38:14,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:38:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:14,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-11 19:38:14,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-11 19:38:14,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-11 19:38:15,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:15,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887079514] [2024-09-11 19:38:15,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:15,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205643522] [2024-09-11 19:38:15,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205643522] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:15,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:38:15,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2024-09-11 19:38:15,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52086608] [2024-09-11 19:38:15,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:15,065 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:38:15,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:15,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:38:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:38:15,066 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-11 19:38:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:15,632 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2024-09-11 19:38:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:38:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 45 [2024-09-11 19:38:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:15,634 INFO L225 Difference]: With dead ends: 128 [2024-09-11 19:38:15,634 INFO L226 Difference]: Without dead ends: 110 [2024-09-11 19:38:15,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:38:15,637 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:15,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 223 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:38:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-11 19:38:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-09-11 19:38:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.2) internal successors, (72), 62 states have internal predecessors, (72), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-11 19:38:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2024-09-11 19:38:15,670 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 45 [2024-09-11 19:38:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:15,671 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2024-09-11 19:38:15,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-11 19:38:15,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2024-09-11 19:38:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-11 19:38:15,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:15,672 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:15,685 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 19:38:15,876 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 [2024-09-11 19:38:15,877 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:15,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 552095135, now seen corresponding path program 1 times [2024-09-11 19:38:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:15,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778824654] [2024-09-11 19:38:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:15,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:15,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944382094] [2024-09-11 19:38:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:15,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:15,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:15,890 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) [2024-09-11 19:38:15,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:38:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:15,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-11 19:38:15,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-11 19:38:16,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-09-11 19:38:16,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:16,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778824654] [2024-09-11 19:38:16,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944382094] [2024-09-11 19:38:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944382094] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:16,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:38:16,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-09-11 19:38:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923508648] [2024-09-11 19:38:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:38:16,111 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:38:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:38:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:38:16,112 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:38:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:16,166 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2024-09-11 19:38:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:38:16,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2024-09-11 19:38:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:16,168 INFO L225 Difference]: With dead ends: 107 [2024-09-11 19:38:16,168 INFO L226 Difference]: Without dead ends: 104 [2024-09-11 19:38:16,168 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:38:16,168 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:16,168 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 82 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:38:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-11 19:38:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2024-09-11 19:38:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 64 states have internal predecessors, (75), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-11 19:38:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2024-09-11 19:38:16,189 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 53 [2024-09-11 19:38:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:16,189 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2024-09-11 19:38:16,189 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 19:38:16,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2024-09-11 19:38:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 19:38:16,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:16,190 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:16,202 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:16,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:16,395 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:16,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1338614477, now seen corresponding path program 1 times [2024-09-11 19:38:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:16,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648358719] [2024-09-11 19:38:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:38:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:38:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 19:38:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:38:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:38:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 19:38:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:38:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 19:38:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-11 19:38:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-11 19:38:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648358719] [2024-09-11 19:38:16,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648358719] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615814519] [2024-09-11 19:38:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:16,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:16,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:16,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:38:16,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:38:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:38:16,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:38:16,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-11 19:38:16,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-11 19:38:16,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615814519] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:16,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:38:16,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-11 19:38:16,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397843903] [2024-09-11 19:38:16,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:16,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:38:16,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:38:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:38:16,665 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-11 19:38:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:16,769 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2024-09-11 19:38:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 19:38:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2024-09-11 19:38:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:16,771 INFO L225 Difference]: With dead ends: 115 [2024-09-11 19:38:16,771 INFO L226 Difference]: Without dead ends: 107 [2024-09-11 19:38:16,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-11 19:38:16,771 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:16,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:38:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-11 19:38:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2024-09-11 19:38:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-11 19:38:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2024-09-11 19:38:16,789 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 56 [2024-09-11 19:38:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:16,789 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2024-09-11 19:38:16,789 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-11 19:38:16,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2024-09-11 19:38:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-11 19:38:16,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:16,791 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:16,802 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-11 19:38:16,994 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 19:38:16,995 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:16,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:16,995 INFO L85 PathProgramCache]: Analyzing trace with hash -248820296, now seen corresponding path program 2 times [2024-09-11 19:38:16,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:16,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032329120] [2024-09-11 19:38:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:16,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:17,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155745232] [2024-09-11 19:38:17,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:38:17,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:17,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:38:17,012 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:38:17,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:38:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:38:17,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 19:38:17,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-11 19:38:17,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-09-11 19:38:17,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:17,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032329120] [2024-09-11 19:38:17,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:17,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155745232] [2024-09-11 19:38:17,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155745232] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:17,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:38:17,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-11 19:38:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717707591] [2024-09-11 19:38:17,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:17,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 19:38:17,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:17,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 19:38:17,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:38:17,879 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2024-09-11 19:38:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:19,451 INFO L93 Difference]: Finished difference Result 180 states and 227 transitions. [2024-09-11 19:38:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:38:19,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 76 [2024-09-11 19:38:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:19,453 INFO L225 Difference]: With dead ends: 180 [2024-09-11 19:38:19,453 INFO L226 Difference]: Without dead ends: 178 [2024-09-11 19:38:19,454 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:38:19,454 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:19,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 259 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 19:38:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-11 19:38:19,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2024-09-11 19:38:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 100 states have internal predecessors, (111), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-11 19:38:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 195 transitions. [2024-09-11 19:38:19,493 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 195 transitions. Word has length 76 [2024-09-11 19:38:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:19,493 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 195 transitions. [2024-09-11 19:38:19,493 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2024-09-11 19:38:19,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 195 transitions. [2024-09-11 19:38:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-11 19:38:19,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:19,494 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:19,506 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:19,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 19:38:19,695 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:19,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:19,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1795395298, now seen corresponding path program 3 times [2024-09-11 19:38:19,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:19,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191949848] [2024-09-11 19:38:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:19,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:19,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787253343] [2024-09-11 19:38:19,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:38:19,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:19,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:19,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:38:19,719 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 19:38:19,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:38:19,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:38:19,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-11 19:38:19,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 76 proven. 19 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-11 19:38:20,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:24,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:24,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191949848] [2024-09-11 19:38:24,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:24,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787253343] [2024-09-11 19:38:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787253343] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:38:24,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:38:24,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-11 19:38:24,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793152975] [2024-09-11 19:38:24,149 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:24,149 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:38:24,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:38:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2024-09-11 19:38:24,150 INFO L87 Difference]: Start difference. First operand 160 states and 195 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-11 19:38:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:24,391 INFO L93 Difference]: Finished difference Result 219 states and 270 transitions. [2024-09-11 19:38:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 19:38:24,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 94 [2024-09-11 19:38:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:24,393 INFO L225 Difference]: With dead ends: 219 [2024-09-11 19:38:24,393 INFO L226 Difference]: Without dead ends: 217 [2024-09-11 19:38:24,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2024-09-11 19:38:24,394 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:24,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 121 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:38:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-11 19:38:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 200. [2024-09-11 19:38:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 122 states have (on average 1.139344262295082) internal successors, (139), 124 states have internal predecessors, (139), 54 states have call successors, (54), 23 states have call predecessors, (54), 23 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-11 19:38:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 247 transitions. [2024-09-11 19:38:24,452 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 247 transitions. Word has length 94 [2024-09-11 19:38:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:24,452 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 247 transitions. [2024-09-11 19:38:24,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-11 19:38:24,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 247 transitions. [2024-09-11 19:38:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-11 19:38:24,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:38:24,454 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:24,465 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:24,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:24,658 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:38:24,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1716779514, now seen corresponding path program 4 times [2024-09-11 19:38:24,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:38:24,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731866098] [2024-09-11 19:38:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:38:24,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:38:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:38:24,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445328417] [2024-09-11 19:38:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:38:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:38:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:38:24,681 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:38:24,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 19:38:24,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:38:24,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:38:24,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 19:38:24,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:38:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 32 proven. 75 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-09-11 19:38:25,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:38:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 32 proven. 75 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-09-11 19:38:25,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:38:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731866098] [2024-09-11 19:38:25,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:38:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445328417] [2024-09-11 19:38:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445328417] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:38:25,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:38:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-11 19:38:25,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146574225] [2024-09-11 19:38:25,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:38:25,457 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:38:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:38:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:38:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:38:25,458 INFO L87 Difference]: Start difference. First operand 200 states and 247 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 13 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2024-09-11 19:38:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:38:25,967 INFO L93 Difference]: Finished difference Result 235 states and 298 transitions. [2024-09-11 19:38:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:38:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 13 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) Word has length 112 [2024-09-11 19:38:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:38:25,969 INFO L225 Difference]: With dead ends: 235 [2024-09-11 19:38:25,969 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 19:38:25,970 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:38:25,970 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:38:25,970 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 323 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:38:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 19:38:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 19:38:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:38:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 19:38:25,971 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2024-09-11 19:38:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:38:25,971 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 19:38:25,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 13 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2024-09-11 19:38:25,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:38:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 19:38:25,972 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 19:38:25,974 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 19:38:25,985 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 19:38:26,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:38:26,177 INFO L408 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:38:26,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 19:38:39,185 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 19:38:39,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 07:38:39 BoogieIcfgContainer [2024-09-11 19:38:39,197 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-11 19:38:39,197 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-11 19:38:39,197 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-11 19:38:39,197 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-11 19:38:39,198 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:38:10" (3/4) ... [2024-09-11 19:38:39,199 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-11 19:38:39,201 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-11 19:38:39,201 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-11 19:38:39,211 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-09-11 19:38:39,211 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-09-11 19:38:39,212 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-11 19:38:39,212 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-11 19:38:39,276 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-11 19:38:39,276 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-11 19:38:39,276 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-11 19:38:39,277 INFO L158 Benchmark]: Toolchain (without parser) took 29187.10ms. Allocated memory was 159.4MB in the beginning and 293.6MB in the end (delta: 134.2MB). Free memory was 87.3MB in the beginning and 150.1MB in the end (delta: -62.8MB). Peak memory consumption was 73.5MB. Max. memory is 16.1GB. [2024-09-11 19:38:39,277 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 159.4MB. Free memory was 109.8MB in the beginning and 109.6MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:38:39,277 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.83ms. Allocated memory is still 159.4MB. Free memory was 87.1MB in the beginning and 75.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-11 19:38:39,277 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.55ms. Allocated memory is still 159.4MB. Free memory was 75.4MB in the beginning and 73.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 19:38:39,278 INFO L158 Benchmark]: Boogie Preprocessor took 26.11ms. Allocated memory is still 159.4MB. Free memory was 73.8MB in the beginning and 72.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 19:38:39,278 INFO L158 Benchmark]: RCFGBuilder took 272.01ms. Allocated memory is still 159.4MB. Free memory was 72.0MB in the beginning and 59.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 19:38:39,278 INFO L158 Benchmark]: TraceAbstraction took 28584.60ms. Allocated memory was 159.4MB in the beginning and 293.6MB in the end (delta: 134.2MB). Free memory was 59.2MB in the beginning and 154.3MB in the end (delta: -95.1MB). Peak memory consumption was 109.2MB. Max. memory is 16.1GB. [2024-09-11 19:38:39,278 INFO L158 Benchmark]: Witness Printer took 79.15ms. Allocated memory is still 293.6MB. Free memory was 154.3MB in the beginning and 150.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-11 19:38:39,279 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 159.4MB. Free memory was 109.8MB in the beginning and 109.6MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.83ms. Allocated memory is still 159.4MB. Free memory was 87.1MB in the beginning and 75.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.55ms. Allocated memory is still 159.4MB. Free memory was 75.4MB in the beginning and 73.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.11ms. Allocated memory is still 159.4MB. Free memory was 73.8MB in the beginning and 72.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 272.01ms. Allocated memory is still 159.4MB. Free memory was 72.0MB in the beginning and 59.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 28584.60ms. Allocated memory was 159.4MB in the beginning and 293.6MB in the end (delta: 134.2MB). Free memory was 59.2MB in the beginning and 154.3MB in the end (delta: -95.1MB). Peak memory consumption was 109.2MB. Max. memory is 16.1GB. * Witness Printer took 79.15ms. Allocated memory is still 293.6MB. Free memory was 154.3MB in the beginning and 150.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.5s, OverallIterations: 14, TraceHistogramMax: 17, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 190 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 149 mSDsluCounter, 1988 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1626 mSDsCounter, 164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1806 IncrementalHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 164 mSolverCounterUnsat, 362 mSDtfsCounter, 1806 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1091 GetRequests, 945 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=13, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 83 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 1280 NumberOfCodeBlocks, 1228 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1119 ConstructedInterpolants, 0 QuantifiedInterpolants, 6017 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1463 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 22 InterpolantComputations, 8 PerfectInterpolantSequences, 2570/2865 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((((__int128) p * s) == (((__int128) q * r) + 1)) && (1 <= y)) && ((((__int128) s * y) + ((__int128) q * x)) == b)) && (1 <= x)) && ((((__int128) r * y) + ((__int128) p * x)) == a)) - InvariantResult [Line: 55]: Location Invariant Derived location invariant: 1 - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-11 19:38:39,300 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE