./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.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-scaling/cohendiv-ll_unwindbound5.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 011044826c7a01c153d09406112c335d599fb158d7a4b72e6a624d5427477c0d --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 19:44:16,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:44:16,911 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:44:16,918 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:44:16,919 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:44:16,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:44:16,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:44:16,947 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:44:16,948 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:44:16,949 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:44:16,949 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:44:16,949 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:44:16,950 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:44:16,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:44:16,953 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:44:16,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:44:16,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:44:16,954 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:44:16,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:44:16,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:44:16,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:44:16,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:44:16,958 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:44:16,958 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:44:16,959 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:44:16,959 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:44:16,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:44:16,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:44:16,959 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:44:16,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:44:16,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:44:16,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:44:16,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:44:16,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:44:16,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:44:16,961 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:44:16,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:44:16,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:44:16,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:44:16,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:44:16,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:44:16,965 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:44:16,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 011044826c7a01c153d09406112c335d599fb158d7a4b72e6a624d5427477c0d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:44:17,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:44:17,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:44:17,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:44:17,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:44:17,212 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:44:17,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2024-09-11 19:44:18,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:44:18,814 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:44:18,814 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2024-09-11 19:44:18,820 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e49e4cab5/9229b1f9cd3d43b281ffb430fce821fd/FLAGc8cad1247 [2024-09-11 19:44:18,832 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e49e4cab5/9229b1f9cd3d43b281ffb430fce821fd [2024-09-11 19:44:18,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:44:18,835 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:44:18,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:44:18,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:44:18,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:44:18,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:44:18" (1/1) ... [2024-09-11 19:44:18,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e54db50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:18, skipping insertion in model container [2024-09-11 19:44:18,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:44:18" (1/1) ... [2024-09-11 19:44:18,874 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:44:19,010 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-scaling/cohendiv-ll_unwindbound5.c[576,589] [2024-09-11 19:44:19,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:44:19,033 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:44:19,043 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-scaling/cohendiv-ll_unwindbound5.c[576,589] [2024-09-11 19:44:19,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:44:19,063 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:44:19,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19 WrapperNode [2024-09-11 19:44:19,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:44:19,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:44:19,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:44:19,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:44:19,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,095 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-09-11 19:44:19,096 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:44:19,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:44:19,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:44:19,097 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:44:19,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,109 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,119 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 19:44:19,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,131 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:44:19,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:44:19,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:44:19,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:44:19,134 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (1/1) ... [2024-09-11 19:44:19,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:44:19,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:19,173 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 19:44:19,177 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 19:44:19,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:44:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:44:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:44:19,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:44:19,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:44:19,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:44:19,290 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:44:19,294 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:44:19,458 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-11 19:44:19,459 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:44:19,489 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:44:19,491 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 19:44:19,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:44:19 BoogieIcfgContainer [2024-09-11 19:44:19,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:44:19,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:44:19,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:44:19,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:44:19,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:44:18" (1/3) ... [2024-09-11 19:44:19,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d11cb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:44:19, skipping insertion in model container [2024-09-11 19:44:19,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:44:19" (2/3) ... [2024-09-11 19:44:19,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d11cb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:44:19, skipping insertion in model container [2024-09-11 19:44:19,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:44:19" (3/3) ... [2024-09-11 19:44:19,502 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound5.c [2024-09-11 19:44:19,518 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:44:19,519 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:44:19,586 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:44:19,593 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;@7750a4da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:44:19,597 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:44:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 19:44:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:44:19,609 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:19,609 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:19,610 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:19,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash 753274055, now seen corresponding path program 1 times [2024-09-11 19:44:19,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:19,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001007882] [2024-09-11 19:44:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:19,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:44:19,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:19,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001007882] [2024-09-11 19:44:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001007882] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:19,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:44:19,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:44:19,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137279490] [2024-09-11 19:44:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:19,781 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:44:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:44:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:44:19,806 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:44:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:19,834 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2024-09-11 19:44:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:44:19,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:44:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:19,849 INFO L225 Difference]: With dead ends: 50 [2024-09-11 19:44:19,849 INFO L226 Difference]: Without dead ends: 24 [2024-09-11 19:44:19,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 19:44:19,855 INFO L434 NwaCegarLoop]: 33 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, 33 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 19:44:19,856 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:44:19,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-11 19:44:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-11 19:44:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:44:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2024-09-11 19:44:19,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 8 [2024-09-11 19:44:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:19,896 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2024-09-11 19:44:19,896 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:44:19,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2024-09-11 19:44:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 19:44:19,899 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:19,900 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:19,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:44:19,901 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:19,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash -79941692, now seen corresponding path program 1 times [2024-09-11 19:44:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:19,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584740058] [2024-09-11 19:44:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:19,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:44:20,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:20,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584740058] [2024-09-11 19:44:20,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584740058] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:20,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:44:20,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:44:20,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268672601] [2024-09-11 19:44:20,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:20,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:44:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:44:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:44:20,117 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:44:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:20,146 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2024-09-11 19:44:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:44:20,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-11 19:44:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:20,147 INFO L225 Difference]: With dead ends: 33 [2024-09-11 19:44:20,147 INFO L226 Difference]: Without dead ends: 26 [2024-09-11 19:44:20,148 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:44:20,149 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:20,150 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:44:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-11 19:44:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-11 19:44:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:44:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-09-11 19:44:20,157 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 9 [2024-09-11 19:44:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:20,158 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-09-11 19:44:20,158 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:44:20,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-09-11 19:44:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 19:44:20,162 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:20,162 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:20,162 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:44:20,162 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash -78452142, now seen corresponding path program 1 times [2024-09-11 19:44:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:20,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55646552] [2024-09-11 19:44:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:20,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521116812] [2024-09-11 19:44:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:20,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:20,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:20,191 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 19:44:20,192 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 19:44:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:20,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:44:20,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:44:20,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:44:20,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:20,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55646552] [2024-09-11 19:44:20,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:20,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521116812] [2024-09-11 19:44:20,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521116812] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:20,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:44:20,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:44:20,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088520580] [2024-09-11 19:44:20,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:20,348 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:44:20,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:20,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:44:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:44:20,352 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:44:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:20,409 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-09-11 19:44:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:44:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-11 19:44:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:20,411 INFO L225 Difference]: With dead ends: 36 [2024-09-11 19:44:20,411 INFO L226 Difference]: Without dead ends: 34 [2024-09-11 19:44:20,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:44:20,412 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:20,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:44:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-11 19:44:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-09-11 19:44:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 19:44:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-09-11 19:44:20,427 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 9 [2024-09-11 19:44:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:20,428 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-09-11 19:44:20,428 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:44:20,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-09-11 19:44:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 19:44:20,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:20,430 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:20,446 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 19:44:20,634 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:20,635 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:20,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:20,636 INFO L85 PathProgramCache]: Analyzing trace with hash 921583882, now seen corresponding path program 1 times [2024-09-11 19:44:20,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:20,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320553172] [2024-09-11 19:44:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:20,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:20,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605082935] [2024-09-11 19:44:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:20,660 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 19:44:20,662 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 19:44:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:20,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:44:20,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:44:20,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:44:20,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:20,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320553172] [2024-09-11 19:44:20,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:20,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605082935] [2024-09-11 19:44:20,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605082935] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:20,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:44:20,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:44:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486393618] [2024-09-11 19:44:20,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:20,779 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:44:20,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:20,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:44:20,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:44:20,781 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:44:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:20,874 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2024-09-11 19:44:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:44:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-11 19:44:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:20,877 INFO L225 Difference]: With dead ends: 49 [2024-09-11 19:44:20,877 INFO L226 Difference]: Without dead ends: 46 [2024-09-11 19:44:20,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 19:44:20,878 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:20,879 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 93 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-11 19:44:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-09-11 19:44:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:44:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2024-09-11 19:44:20,904 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 14 [2024-09-11 19:44:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:20,905 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2024-09-11 19:44:20,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:44:20,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2024-09-11 19:44:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:44:20,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:20,908 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:20,923 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 19:44:21,112 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:21,113 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:21,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1948965363, now seen corresponding path program 1 times [2024-09-11 19:44:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150688676] [2024-09-11 19:44:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:21,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:21,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71938203] [2024-09-11 19:44:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:21,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:21,158 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 19:44:21,161 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 19:44:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:21,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:44:21,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:44:21,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:44:21,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:21,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150688676] [2024-09-11 19:44:21,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:21,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71938203] [2024-09-11 19:44:21,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71938203] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:21,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:44:21,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:44:21,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866330917] [2024-09-11 19:44:21,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:21,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:44:21,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:44:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:44:21,251 INFO L87 Difference]: Start difference. First operand 45 states and 60 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, (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 19:44:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:21,337 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2024-09-11 19:44:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:44:21,337 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, (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 22 [2024-09-11 19:44:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:21,339 INFO L225 Difference]: With dead ends: 74 [2024-09-11 19:44:21,340 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 19:44:21,340 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 19:44:21,341 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:21,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 110 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 19:44:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2024-09-11 19:44:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-11 19:44:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2024-09-11 19:44:21,356 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 22 [2024-09-11 19:44:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:21,357 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2024-09-11 19:44:21,357 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, (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 19:44:21,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2024-09-11 19:44:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 19:44:21,358 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:21,358 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:21,375 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 19:44:21,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:21,559 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:21,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1914041250, now seen corresponding path program 1 times [2024-09-11 19:44:21,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:21,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771100344] [2024-09-11 19:44:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:21,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 19:44:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:21,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 19:44:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:44:21,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771100344] [2024-09-11 19:44:21,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771100344] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:21,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:44:21,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-11 19:44:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154915575] [2024-09-11 19:44:21,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:21,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:44:21,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:44:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:44:21,729 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 19:44:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:21,777 INFO L93 Difference]: Finished difference Result 104 states and 144 transitions. [2024-09-11 19:44:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:44:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 25 [2024-09-11 19:44:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:21,780 INFO L225 Difference]: With dead ends: 104 [2024-09-11 19:44:21,781 INFO L226 Difference]: Without dead ends: 69 [2024-09-11 19:44:21,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:44:21,784 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 92 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 19:44:21,784 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 92 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:44:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-11 19:44:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-11 19:44:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.255813953488372) internal successors, (54), 45 states have internal predecessors, (54), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-11 19:44:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2024-09-11 19:44:21,836 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 25 [2024-09-11 19:44:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:21,837 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2024-09-11 19:44:21,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 19:44:21,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2024-09-11 19:44:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 19:44:21,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:21,839 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:21,839 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-11 19:44:21,839 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:21,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:21,839 INFO L85 PathProgramCache]: Analyzing trace with hash -531579021, now seen corresponding path program 1 times [2024-09-11 19:44:21,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:21,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184209094] [2024-09-11 19:44:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 19:44:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 19:44:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:44:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:44:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 19:44:22,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:22,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184209094] [2024-09-11 19:44:22,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184209094] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:22,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:44:22,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 19:44:22,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231459529] [2024-09-11 19:44:22,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:22,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 19:44:22,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 19:44:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:44:22,130 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:44:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:22,227 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2024-09-11 19:44:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:44:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-09-11 19:44:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:22,231 INFO L225 Difference]: With dead ends: 75 [2024-09-11 19:44:22,232 INFO L226 Difference]: Without dead ends: 73 [2024-09-11 19:44:22,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:44:22,234 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:22,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 100 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-11 19:44:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-11 19:44:22,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-11 19:44:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2024-09-11 19:44:22,254 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 32 [2024-09-11 19:44:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:22,255 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2024-09-11 19:44:22,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 19:44:22,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2024-09-11 19:44:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:44:22,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:22,257 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:22,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-11 19:44:22,257 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:22,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2026419203, now seen corresponding path program 1 times [2024-09-11 19:44:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468234429] [2024-09-11 19:44:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 19:44:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 19:44:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:44:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:44:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:44:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 19:44:22,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:22,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468234429] [2024-09-11 19:44:22,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468234429] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:44:22,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055686896] [2024-09-11 19:44:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:22,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:22,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:22,416 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 19:44:22,419 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 19:44:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:22,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:44:22,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 19:44:22,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:44:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055686896] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:44:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:44:22,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-11 19:44:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231265327] [2024-09-11 19:44:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:22,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:44:22,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:44:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:44:22,571 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 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 19:44:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:22,680 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2024-09-11 19:44:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:44:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 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 38 [2024-09-11 19:44:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:22,681 INFO L225 Difference]: With dead ends: 86 [2024-09-11 19:44:22,681 INFO L226 Difference]: Without dead ends: 84 [2024-09-11 19:44:22,682 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:44:22,682 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:22,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-11 19:44:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2024-09-11 19:44:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 53 states have internal predecessors, (60), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-11 19:44:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2024-09-11 19:44:22,710 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 38 [2024-09-11 19:44:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:22,710 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2024-09-11 19:44:22,710 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 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 19:44:22,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2024-09-11 19:44:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-11 19:44:22,712 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:22,712 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:22,730 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 19:44:22,917 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:22,918 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:22,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:22,918 INFO L85 PathProgramCache]: Analyzing trace with hash -369399342, now seen corresponding path program 1 times [2024-09-11 19:44:22,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:22,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055462965] [2024-09-11 19:44:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 19:44:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 19:44:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:44:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:44:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:44:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 19:44:23,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:23,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055462965] [2024-09-11 19:44:23,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055462965] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:44:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827990090] [2024-09-11 19:44:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:23,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:23,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:23,062 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 19:44:23,063 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 19:44:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:44:23,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 19:44:23,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 19:44:23,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827990090] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:23,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:44:23,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2024-09-11 19:44:23,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795572602] [2024-09-11 19:44:23,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:23,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:44:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:44:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:44:23,288 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-11 19:44:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:23,439 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2024-09-11 19:44:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:44:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 41 [2024-09-11 19:44:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:23,443 INFO L225 Difference]: With dead ends: 190 [2024-09-11 19:44:23,443 INFO L226 Difference]: Without dead ends: 183 [2024-09-11 19:44:23,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:44:23,444 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:23,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-09-11 19:44:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2024-09-11 19:44:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 110 states have (on average 1.190909090909091) internal successors, (131), 116 states have internal predecessors, (131), 39 states have call successors, (39), 19 states have call predecessors, (39), 19 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-11 19:44:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2024-09-11 19:44:23,484 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 41 [2024-09-11 19:44:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:23,484 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2024-09-11 19:44:23,484 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-11 19:44:23,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2024-09-11 19:44:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 19:44:23,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:23,489 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:23,506 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 19:44:23,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:23,694 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:23,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1199104068, now seen corresponding path program 1 times [2024-09-11 19:44:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:23,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255539833] [2024-09-11 19:44:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:23,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010197367] [2024-09-11 19:44:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:23,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:23,709 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 19:44:23,711 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 19:44:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:23,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-11 19:44:23,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:44:24,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:24,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:24,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255539833] [2024-09-11 19:44:24,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:24,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010197367] [2024-09-11 19:44:24,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010197367] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:44:24,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:44:24,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-11 19:44:24,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361485929] [2024-09-11 19:44:24,374 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:24,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:44:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:44:24,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:44:24,375 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-11 19:44:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:24,565 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2024-09-11 19:44:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:44:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-09-11 19:44:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:24,567 INFO L225 Difference]: With dead ends: 226 [2024-09-11 19:44:24,567 INFO L226 Difference]: Without dead ends: 146 [2024-09-11 19:44:24,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:44:24,569 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:24,569 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 154 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-11 19:44:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2024-09-11 19:44:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 99 states have internal predecessors, (111), 33 states have call successors, (33), 17 states have call predecessors, (33), 17 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:44:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2024-09-11 19:44:24,588 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 46 [2024-09-11 19:44:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:24,589 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2024-09-11 19:44:24,589 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-11 19:44:24,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2024-09-11 19:44:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-11 19:44:24,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:24,590 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:24,607 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 19:44:24,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 19:44:24,791 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:24,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 902121970, now seen corresponding path program 1 times [2024-09-11 19:44:24,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570321780] [2024-09-11 19:44:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:24,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806976750] [2024-09-11 19:44:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:24,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:24,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:24,810 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 19:44:24,811 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 19:44:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:24,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:44:24,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:44:24,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-11 19:44:24,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:24,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570321780] [2024-09-11 19:44:24,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:24,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806976750] [2024-09-11 19:44:24,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806976750] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:44:24,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:44:24,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-11 19:44:24,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894118062] [2024-09-11 19:44:24,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:44:24,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:44:24,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:24,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:44:24,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:44:24,989 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:44:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:25,053 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2024-09-11 19:44:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:44:25,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-11 19:44:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:25,055 INFO L225 Difference]: With dead ends: 159 [2024-09-11 19:44:25,056 INFO L226 Difference]: Without dead ends: 157 [2024-09-11 19:44:25,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:44:25,057 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:25,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:44:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-11 19:44:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-09-11 19:44:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 108 states have internal predecessors, (120), 33 states have call successors, (33), 20 states have call predecessors, (33), 20 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:44:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2024-09-11 19:44:25,079 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 46 [2024-09-11 19:44:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:25,079 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2024-09-11 19:44:25,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:44:25,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2024-09-11 19:44:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-11 19:44:25,081 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:25,081 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:25,097 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 19:44:25,281 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:25,282 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:25,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1064319211, now seen corresponding path program 1 times [2024-09-11 19:44:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:25,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065710382] [2024-09-11 19:44:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 19:44:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 19:44:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:44:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:44:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:44:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-11 19:44:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-11 19:44:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:44:25,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:25,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065710382] [2024-09-11 19:44:25,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065710382] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:44:25,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470934845] [2024-09-11 19:44:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:25,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:25,386 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 19:44:25,393 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 19:44:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:25,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:44:25,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-11 19:44:25,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:44:25,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470934845] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:25,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:44:25,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2024-09-11 19:44:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408215498] [2024-09-11 19:44:25,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:25,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:44:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:44:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:44:25,598 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-09-11 19:44:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:25,736 INFO L93 Difference]: Finished difference Result 232 states and 274 transitions. [2024-09-11 19:44:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:44:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 54 [2024-09-11 19:44:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:25,739 INFO L225 Difference]: With dead ends: 232 [2024-09-11 19:44:25,739 INFO L226 Difference]: Without dead ends: 166 [2024-09-11 19:44:25,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:44:25,740 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:25,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 120 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-11 19:44:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2024-09-11 19:44:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 112 states have internal predecessors, (123), 33 states have call successors, (33), 20 states have call predecessors, (33), 20 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:44:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2024-09-11 19:44:25,764 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 54 [2024-09-11 19:44:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:25,764 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2024-09-11 19:44:25,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-09-11 19:44:25,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2024-09-11 19:44:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-11 19:44:25,766 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:25,766 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 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 19:44:25,784 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 19:44:25,966 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:25,967 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:25,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash -716710404, now seen corresponding path program 2 times [2024-09-11 19:44:25,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:25,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492894966] [2024-09-11 19:44:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:25,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-11 19:44:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 19:44:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:44:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:44:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:44:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-11 19:44:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-11 19:44:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-11 19:44:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-11 19:44:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-11 19:44:26,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:26,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492894966] [2024-09-11 19:44:26,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492894966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:44:26,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997493013] [2024-09-11 19:44:26,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:44:26,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:26,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:26,130 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 19:44:26,132 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 19:44:26,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:44:26,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:44:26,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-11 19:44:26,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-11 19:44:26,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-11 19:44:26,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997493013] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:26,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:44:26,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 14 [2024-09-11 19:44:26,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082461552] [2024-09-11 19:44:26,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:26,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 19:44:26,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:26,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 19:44:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:44:26,397 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-09-11 19:44:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:26,531 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2024-09-11 19:44:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:44:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 62 [2024-09-11 19:44:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:26,533 INFO L225 Difference]: With dead ends: 172 [2024-09-11 19:44:26,533 INFO L226 Difference]: Without dead ends: 170 [2024-09-11 19:44:26,533 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:44:26,534 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:26,534 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:44:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-11 19:44:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-09-11 19:44:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 118 states have internal predecessors, (128), 33 states have call successors, (33), 22 states have call predecessors, (33), 22 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:44:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2024-09-11 19:44:26,567 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 62 [2024-09-11 19:44:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:26,567 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2024-09-11 19:44:26,567 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-09-11 19:44:26,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2024-09-11 19:44:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-11 19:44:26,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:26,569 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:26,586 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 19:44:26,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-11 19:44:26,770 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:26,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1772176059, now seen corresponding path program 1 times [2024-09-11 19:44:26,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:26,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101436379] [2024-09-11 19:44:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:26,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:26,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625734052] [2024-09-11 19:44:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:26,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:26,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:26,794 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 19:44:26,799 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 19:44:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:44:26,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-11 19:44:26,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-11 19:44:27,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:27,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:27,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101436379] [2024-09-11 19:44:27,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:27,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625734052] [2024-09-11 19:44:27,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625734052] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:44:27,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:44:27,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-11 19:44:27,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308797440] [2024-09-11 19:44:27,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:27,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:44:27,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:44:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=296, Unknown=1, NotChecked=0, Total=380 [2024-09-11 19:44:27,812 INFO L87 Difference]: Start difference. First operand 170 states and 192 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-11 19:44:28,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:28,068 INFO L93 Difference]: Finished difference Result 196 states and 227 transitions. [2024-09-11 19:44:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 19:44:28,069 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 70 [2024-09-11 19:44:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:28,071 INFO L225 Difference]: With dead ends: 196 [2024-09-11 19:44:28,071 INFO L226 Difference]: Without dead ends: 193 [2024-09-11 19:44:28,071 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=329, Unknown=1, NotChecked=0, Total=420 [2024-09-11 19:44:28,072 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 20 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:28,072 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 251 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:44:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-11 19:44:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2024-09-11 19:44:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.12) internal successors, (140), 129 states have internal predecessors, (140), 40 states have call successors, (40), 24 states have call predecessors, (40), 24 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2024-09-11 19:44:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 219 transitions. [2024-09-11 19:44:28,099 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 219 transitions. Word has length 70 [2024-09-11 19:44:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:28,101 INFO L474 AbstractCegarLoop]: Abstraction has 190 states and 219 transitions. [2024-09-11 19:44:28,101 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-11 19:44:28,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 219 transitions. [2024-09-11 19:44:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-11 19:44:28,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:44:28,104 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:28,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-11 19:44:28,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:44:28,305 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:44:28,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 51517626, now seen corresponding path program 2 times [2024-09-11 19:44:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:44:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912300066] [2024-09-11 19:44:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:44:28,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:44:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:44:28,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468676470] [2024-09-11 19:44:28,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:44:28,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:44:28,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:44:28,323 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 19:44:28,325 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 19:44:28,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:44:28,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:44:28,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-11 19:44:28,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:44:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-11 19:44:28,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:44:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-11 19:44:29,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:44:29,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912300066] [2024-09-11 19:44:29,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:44:29,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468676470] [2024-09-11 19:44:29,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468676470] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:44:29,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:44:29,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2024-09-11 19:44:29,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768075938] [2024-09-11 19:44:29,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:44:29,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 19:44:29,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:44:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 19:44:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:44:29,342 INFO L87 Difference]: Start difference. First operand 190 states and 219 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2024-09-11 19:44:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:44:29,839 INFO L93 Difference]: Finished difference Result 216 states and 259 transitions. [2024-09-11 19:44:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 19:44:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) Word has length 94 [2024-09-11 19:44:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:44:29,840 INFO L225 Difference]: With dead ends: 216 [2024-09-11 19:44:29,840 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 19:44:29,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:44:29,843 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 90 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:44:29,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 420 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:44:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 19:44:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 19:44:29,844 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 19:44:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 19:44:29,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2024-09-11 19:44:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:44:29,845 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 19:44:29,847 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 12 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2024-09-11 19:44:29,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:44:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 19:44:29,848 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 19:44:29,850 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 19:44:29,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 19:44:30,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 19:44:30,054 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:44:30,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 19:44:31,591 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 19:44:31,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 07:44:31 BoogieIcfgContainer [2024-09-11 19:44:31,605 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-11 19:44:31,605 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-11 19:44:31,605 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-11 19:44:31,605 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-11 19:44:31,606 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:44:19" (3/4) ... [2024-09-11 19:44:31,608 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-11 19:44:31,611 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-11 19:44:31,616 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-11 19:44:31,617 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-11 19:44:31,617 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-11 19:44:31,617 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-11 19:44:31,696 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-11 19:44:31,697 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-11 19:44:31,697 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-11 19:44:31,697 INFO L158 Benchmark]: Toolchain (without parser) took 12862.40ms. Allocated memory was 155.2MB in the beginning and 207.6MB in the end (delta: 52.4MB). Free memory was 97.0MB in the beginning and 100.3MB in the end (delta: -3.2MB). Peak memory consumption was 52.9MB. Max. memory is 16.1GB. [2024-09-11 19:44:31,698 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 155.2MB. Free memory is still 118.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:44:31,698 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.89ms. Allocated memory is still 155.2MB. Free memory was 97.0MB in the beginning and 85.4MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 19:44:31,698 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.77ms. Allocated memory is still 155.2MB. Free memory was 85.4MB in the beginning and 84.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:44:31,698 INFO L158 Benchmark]: Boogie Preprocessor took 35.65ms. Allocated memory is still 155.2MB. Free memory was 84.0MB in the beginning and 81.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 19:44:31,698 INFO L158 Benchmark]: RCFGBuilder took 358.65ms. Allocated memory is still 155.2MB. Free memory was 81.9MB in the beginning and 69.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 19:44:31,699 INFO L158 Benchmark]: TraceAbstraction took 12110.64ms. Allocated memory was 155.2MB in the beginning and 207.6MB in the end (delta: 52.4MB). Free memory was 68.7MB in the beginning and 104.5MB in the end (delta: -35.7MB). Peak memory consumption was 70.2MB. Max. memory is 16.1GB. [2024-09-11 19:44:31,699 INFO L158 Benchmark]: Witness Printer took 91.91ms. Allocated memory is still 207.6MB. Free memory was 104.5MB in the beginning and 100.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-11 19:44:31,703 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 155.2MB. Free memory is still 118.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.89ms. Allocated memory is still 155.2MB. Free memory was 97.0MB in the beginning and 85.4MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.77ms. Allocated memory is still 155.2MB. Free memory was 85.4MB in the beginning and 84.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.65ms. Allocated memory is still 155.2MB. Free memory was 84.0MB in the beginning and 81.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 358.65ms. Allocated memory is still 155.2MB. Free memory was 81.9MB in the beginning and 69.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 12110.64ms. Allocated memory was 155.2MB in the beginning and 207.6MB in the end (delta: 52.4MB). Free memory was 68.7MB in the beginning and 104.5MB in the end (delta: -35.7MB). Peak memory consumption was 70.2MB. Max. memory is 16.1GB. * Witness Printer took 91.91ms. Allocated memory is still 207.6MB. Free memory was 104.5MB in the beginning and 100.3MB 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: 17]: 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 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.5s, OverallIterations: 15, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 344 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 305 mSDsluCounter, 2052 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1614 mSDsCounter, 140 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1520 IncrementalHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 140 mSolverCounterUnsat, 438 mSDtfsCounter, 1520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 995 GetRequests, 850 SyntacticMatches, 6 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=14, InterpolantAutomatonStates: 116, 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, 15 MinimizatonAttempts, 38 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1066 NumberOfCodeBlocks, 1066 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1038 ConstructedInterpolants, 0 QuantifiedInterpolants, 3724 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1358 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 2218/2395 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: 63]: Location Invariant Derived location invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((x == (r + ((__int128) q * y))) && (1 <= y)) && (1 <= r)) && ((b + x) == ((((__int128) a * y) + r) + ((__int128) q * y)))) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((x == (r + ((__int128) q * y))) && (1 <= y)) && ((b + x) == ((((__int128) a * y) + r) + ((__int128) q * y)))) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-11 19:44:31,722 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE