./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.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 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 23:32:13,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 23:32:13,906 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 23:32:13,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 23:32:13,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 23:32:13,940 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 23:32:13,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 23:32:13,941 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 23:32:13,941 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 23:32:13,943 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 23:32:13,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 23:32:13,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 23:32:13,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 23:32:13,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 23:32:13,945 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 23:32:13,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 23:32:13,948 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 23:32:13,948 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 23:32:13,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 23:32:13,949 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 23:32:13,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 23:32:13,950 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 23:32:13,950 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 23:32:13,950 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 23:32:13,950 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 23:32:13,950 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 23:32:13,951 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 23:32:13,951 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 23:32:13,951 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 23:32:13,952 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 23:32:13,952 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 23:32:13,952 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 23:32:13,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:32:13,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 23:32:13,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 23:32:13,953 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 23:32:13,953 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 23:32:13,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 23:32:13,954 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 23:32:13,954 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 23:32:13,954 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 23:32:13,954 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 23:32:13,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 23:32:14,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 23:32:14,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 23:32:14,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 23:32:14,255 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 23:32:14,256 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 23:32:14,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2024-09-12 23:32:15,627 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 23:32:15,795 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 23:32:15,795 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2024-09-12 23:32:15,802 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/19ebf306f/842dc37dd9ec48d490a0062174eb0f24/FLAGee0593aff [2024-09-12 23:32:15,813 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/19ebf306f/842dc37dd9ec48d490a0062174eb0f24 [2024-09-12 23:32:15,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 23:32:15,817 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 23:32:15,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 23:32:15,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 23:32:15,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 23:32:15,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:32:15" (1/1) ... [2024-09-12 23:32:15,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2659d44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:15, skipping insertion in model container [2024-09-12 23:32:15,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:32:15" (1/1) ... [2024-09-12 23:32:15,840 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 23:32:15,966 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_unwindbound20.c[576,589] [2024-09-12 23:32:15,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:32:15,990 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 23:32:16,001 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_unwindbound20.c[576,589] [2024-09-12 23:32:16,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:32:16,032 INFO L204 MainTranslator]: Completed translation [2024-09-12 23:32:16,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16 WrapperNode [2024-09-12 23:32:16,033 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 23:32:16,034 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 23:32:16,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 23:32:16,035 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 23:32:16,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,052 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 23:32:16,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 23:32:16,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 23:32:16,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 23:32:16,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 23:32:16,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,078 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 23:32:16,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 23:32:16,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 23:32:16,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 23:32:16,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 23:32:16,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (1/1) ... [2024-09-12 23:32:16,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:32:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:16,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 23:32:16,119 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 23:32:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 23:32:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 23:32:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 23:32:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 23:32:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 23:32:16,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 23:32:16,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 23:32:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 23:32:16,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 23:32:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 23:32:16,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 23:32:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 23:32:16,226 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 23:32:16,228 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 23:32:16,389 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 23:32:16,390 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 23:32:16,411 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 23:32:16,412 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 23:32:16,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:32:16 BoogieIcfgContainer [2024-09-12 23:32:16,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 23:32:16,417 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 23:32:16,417 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 23:32:16,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 23:32:16,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 11:32:15" (1/3) ... [2024-09-12 23:32:16,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebefe72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:32:16, skipping insertion in model container [2024-09-12 23:32:16,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:32:16" (2/3) ... [2024-09-12 23:32:16,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebefe72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:32:16, skipping insertion in model container [2024-09-12 23:32:16,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:32:16" (3/3) ... [2024-09-12 23:32:16,422 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c [2024-09-12 23:32:16,436 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 23:32:16,436 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 23:32:16,477 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 23:32:16,482 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;@4bd39ab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 23:32:16,482 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 23:32:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 23:32:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 23:32:16,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:16,494 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:16,495 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -166019731, now seen corresponding path program 1 times [2024-09-12 23:32:16,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:16,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122432093] [2024-09-12 23:32:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:16,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:16,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:16,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:32:16,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:16,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122432093] [2024-09-12 23:32:16,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122432093] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:16,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:16,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 23:32:16,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637294563] [2024-09-12 23:32:16,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:16,679 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 23:32:16,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 23:32:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 23:32:16,697 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 23:32:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:16,782 INFO L93 Difference]: Finished difference Result 65 states and 98 transitions. [2024-09-12 23:32:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 23:32:16,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-12 23:32:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:16,791 INFO L225 Difference]: With dead ends: 65 [2024-09-12 23:32:16,791 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 23:32:16,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 23:32:16,796 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:16,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 23:32:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-12 23:32:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 23:32:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-12 23:32:16,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 16 [2024-09-12 23:32:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:16,832 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-12 23:32:16,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 23:32:16,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-12 23:32:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 23:32:16,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:16,834 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:16,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 23:32:16,835 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:16,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1899526296, now seen corresponding path program 1 times [2024-09-12 23:32:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:16,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554854356] [2024-09-12 23:32:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:16,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:16,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:16,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:32:16,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:16,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554854356] [2024-09-12 23:32:16,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554854356] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:16,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:16,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:32:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508802242] [2024-09-12 23:32:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:16,992 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:32:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:32:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:32:16,993 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 23:32:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:17,126 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-09-12 23:32:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 23:32:17,127 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-12 23:32:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:17,128 INFO L225 Difference]: With dead ends: 41 [2024-09-12 23:32:17,128 INFO L226 Difference]: Without dead ends: 34 [2024-09-12 23:32:17,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:32:17,130 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:17,130 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-12 23:32:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-12 23:32:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 23:32:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-12 23:32:17,140 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2024-09-12 23:32:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:17,140 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-12 23:32:17,140 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 23:32:17,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-12 23:32:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 23:32:17,142 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:17,142 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:17,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 23:32:17,142 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:17,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1901015846, now seen corresponding path program 1 times [2024-09-12 23:32:17,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:17,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278983066] [2024-09-12 23:32:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:17,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208335461] [2024-09-12 23:32:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:17,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:17,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:17,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:17,165 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 23:32:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:17,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:32:17,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:32:17,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:32:17,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:17,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278983066] [2024-09-12 23:32:17,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:17,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208335461] [2024-09-12 23:32:17,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208335461] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:17,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:17,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:32:17,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803334516] [2024-09-12 23:32:17,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:17,286 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:32:17,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:17,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:32:17,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:32:17,287 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 23:32:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:17,354 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-12 23:32:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:32:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-12 23:32:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:17,356 INFO L225 Difference]: With dead ends: 44 [2024-09-12 23:32:17,358 INFO L226 Difference]: Without dead ends: 42 [2024-09-12 23:32:17,358 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:32:17,359 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:17,362 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:32:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-12 23:32:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-09-12 23:32:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 23:32:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-09-12 23:32:17,380 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 17 [2024-09-12 23:32:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:17,380 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-09-12 23:32:17,380 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 23:32:17,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-09-12 23:32:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 23:32:17,382 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:17,383 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:17,398 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 23:32:17,583 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 [2024-09-12 23:32:17,583 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:17,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1706287866, now seen corresponding path program 1 times [2024-09-12 23:32:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:17,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004479861] [2024-09-12 23:32:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702609402] [2024-09-12 23:32:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:17,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:17,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:17,611 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 23:32:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:17,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:32:17,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:32:17,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:32:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:17,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004479861] [2024-09-12 23:32:17,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702609402] [2024-09-12 23:32:17,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702609402] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:17,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:17,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:32:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422777769] [2024-09-12 23:32:17,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:17,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:32:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:17,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:32:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:32:17,712 INFO L87 Difference]: Start difference. First operand 39 states and 48 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 23:32:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:17,808 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-09-12 23:32:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:32:17,809 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-12 23:32:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:17,811 INFO L225 Difference]: With dead ends: 57 [2024-09-12 23:32:17,813 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 23:32:17,813 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 [2024-09-12 23:32:17,814 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:17,815 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 124 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 23:32:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-09-12 23:32:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 23:32:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-09-12 23:32:17,838 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 22 [2024-09-12 23:32:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:17,838 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-09-12 23:32:17,838 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 23:32:17,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-09-12 23:32:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 23:32:17,841 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:17,841 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:17,858 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 23:32:18,041 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 [2024-09-12 23:32:18,042 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:18,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1856957465, now seen corresponding path program 1 times [2024-09-12 23:32:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:18,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286581709] [2024-09-12 23:32:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:18,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:18,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306389008] [2024-09-12 23:32:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:18,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:18,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 23:32:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:18,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 23:32:18,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 23:32:18,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:32:18,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:18,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286581709] [2024-09-12 23:32:18,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:18,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306389008] [2024-09-12 23:32:18,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306389008] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:18,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:18,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:32:18,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500198076] [2024-09-12 23:32:18,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:18,169 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:32:18,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:18,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:32:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:32:18,170 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 23:32:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:18,248 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2024-09-12 23:32:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:32:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-09-12 23:32:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:18,251 INFO L225 Difference]: With dead ends: 82 [2024-09-12 23:32:18,251 INFO L226 Difference]: Without dead ends: 80 [2024-09-12 23:32:18,252 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:32:18,256 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:18,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-12 23:32:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2024-09-12 23:32:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 45 states have internal predecessors, (55), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-12 23:32:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2024-09-12 23:32:18,283 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 30 [2024-09-12 23:32:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:18,283 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2024-09-12 23:32:18,283 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-12 23:32:18,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2024-09-12 23:32:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 23:32:18,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:18,286 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:18,303 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 23:32:18,487 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 [2024-09-12 23:32:18,487 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:18,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1900127414, now seen corresponding path program 1 times [2024-09-12 23:32:18,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:18,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277990322] [2024-09-12 23:32:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:18,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:18,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:18,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 23:32:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:18,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 23:32:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 23:32:18,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:18,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277990322] [2024-09-12 23:32:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277990322] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:18,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:18,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-12 23:32:18,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697480451] [2024-09-12 23:32:18,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:18,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 23:32:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 23:32:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 23:32:18,664 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-12 23:32:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:18,783 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2024-09-12 23:32:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 23:32:18,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-09-12 23:32:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:18,786 INFO L225 Difference]: With dead ends: 112 [2024-09-12 23:32:18,787 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 23:32:18,787 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-12 23:32:18,789 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:18,790 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 23:32:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-12 23:32:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-12 23:32:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2024-09-12 23:32:18,812 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 33 [2024-09-12 23:32:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:18,812 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2024-09-12 23:32:18,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-12 23:32:18,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2024-09-12 23:32:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 23:32:18,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:18,814 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:18,814 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-12 23:32:18,815 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:18,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2073680743, now seen corresponding path program 1 times [2024-09-12 23:32:18,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:18,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707543355] [2024-09-12 23:32:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:18,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 23:32:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 23:32:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 23:32:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 23:32:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 23:32:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707543355] [2024-09-12 23:32:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707543355] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:19,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:32:19,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-12 23:32:19,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531449530] [2024-09-12 23:32:19,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:19,057 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 23:32:19,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:19,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 23:32:19,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-12 23:32:19,059 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 23:32:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:19,302 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-12 23:32:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 23:32:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-09-12 23:32:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:19,304 INFO L225 Difference]: With dead ends: 83 [2024-09-12 23:32:19,304 INFO L226 Difference]: Without dead ends: 81 [2024-09-12 23:32:19,305 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-12 23:32:19,308 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:19,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-12 23:32:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-12 23:32:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 51 states have internal predecessors, (60), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-12 23:32:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2024-09-12 23:32:19,330 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 40 [2024-09-12 23:32:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:19,331 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2024-09-12 23:32:19,331 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 23:32:19,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2024-09-12 23:32:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 23:32:19,334 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:19,334 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:19,334 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-12 23:32:19,334 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:19,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:19,335 INFO L85 PathProgramCache]: Analyzing trace with hash -930915559, now seen corresponding path program 1 times [2024-09-12 23:32:19,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:19,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097912995] [2024-09-12 23:32:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:19,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 23:32:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 23:32:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 23:32:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 23:32:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 23:32:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 23:32:19,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:19,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097912995] [2024-09-12 23:32:19,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097912995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:19,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505764925] [2024-09-12 23:32:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:19,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:19,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:19,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 23:32:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:19,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:32:19,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 23:32:19,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:32:19,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505764925] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:32:19,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:32:19,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-09-12 23:32:19,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595768035] [2024-09-12 23:32:19,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:19,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 23:32:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 23:32:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-12 23:32:19,657 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 23:32:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:19,747 INFO L93 Difference]: Finished difference Result 94 states and 120 transitions. [2024-09-12 23:32:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 23:32:19,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-12 23:32:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:19,748 INFO L225 Difference]: With dead ends: 94 [2024-09-12 23:32:19,748 INFO L226 Difference]: Without dead ends: 92 [2024-09-12 23:32:19,749 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-12 23:32:19,749 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:19,749 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 185 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-12 23:32:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2024-09-12 23:32:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 56 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-12 23:32:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2024-09-12 23:32:19,771 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 46 [2024-09-12 23:32:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:19,771 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2024-09-12 23:32:19,771 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 23:32:19,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2024-09-12 23:32:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 23:32:19,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:19,775 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:19,792 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 23:32:19,979 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 [2024-09-12 23:32:19,979 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:19,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash -872582608, now seen corresponding path program 1 times [2024-09-12 23:32:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:19,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517258410] [2024-09-12 23:32:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 23:32:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 23:32:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 23:32:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 23:32:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 23:32:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 23:32:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517258410] [2024-09-12 23:32:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517258410] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521359902] [2024-09-12 23:32:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:20,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:20,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:20,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:20,137 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 23:32:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:20,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 23:32:20,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 23:32:20,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:32:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 23:32:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521359902] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:32:20,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:32:20,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-09-12 23:32:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810872947] [2024-09-12 23:32:20,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:32:20,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 23:32:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 23:32:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-09-12 23:32:20,369 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-12 23:32:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:20,696 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2024-09-12 23:32:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 23:32:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 49 [2024-09-12 23:32:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:20,700 INFO L225 Difference]: With dead ends: 254 [2024-09-12 23:32:20,700 INFO L226 Difference]: Without dead ends: 247 [2024-09-12 23:32:20,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:32:20,703 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:20,703 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 148 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 23:32:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-12 23:32:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 231. [2024-09-12 23:32:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 155 states have internal predecessors, (175), 58 states have call successors, (58), 27 states have call predecessors, (58), 26 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-12 23:32:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 286 transitions. [2024-09-12 23:32:20,737 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 286 transitions. Word has length 49 [2024-09-12 23:32:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:20,737 INFO L474 AbstractCegarLoop]: Abstraction has 231 states and 286 transitions. [2024-09-12 23:32:20,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-12 23:32:20,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 286 transitions. [2024-09-12 23:32:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 23:32:20,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:20,739 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:20,755 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 23:32:20,939 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 [2024-09-12 23:32:20,940 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:20,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 260253794, now seen corresponding path program 1 times [2024-09-12 23:32:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:20,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267421496] [2024-09-12 23:32:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:32:20,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166121805] [2024-09-12 23:32:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:20,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:20,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:20,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:20,956 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 23:32:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:21,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 23:32:21,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 23:32:21,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:32:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 23:32:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267421496] [2024-09-12 23:32:21,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:32:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166121805] [2024-09-12 23:32:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166121805] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:21,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:32:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-09-12 23:32:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575081438] [2024-09-12 23:32:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:32:21,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 23:32:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 23:32:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-12 23:32:21,532 INFO L87 Difference]: Start difference. First operand 231 states and 286 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-12 23:32:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:21,687 INFO L93 Difference]: Finished difference Result 249 states and 303 transitions. [2024-09-12 23:32:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:32:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-09-12 23:32:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:21,690 INFO L225 Difference]: With dead ends: 249 [2024-09-12 23:32:21,690 INFO L226 Difference]: Without dead ends: 243 [2024-09-12 23:32:21,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-12 23:32:21,693 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:21,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-12 23:32:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 178. [2024-09-12 23:32:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 119 states have internal predecessors, (129), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (38), 33 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-12 23:32:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 206 transitions. [2024-09-12 23:32:21,757 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 206 transitions. Word has length 54 [2024-09-12 23:32:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:21,757 INFO L474 AbstractCegarLoop]: Abstraction has 178 states and 206 transitions. [2024-09-12 23:32:21,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-12 23:32:21,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 206 transitions. [2024-09-12 23:32:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-12 23:32:21,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:32:21,758 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:21,775 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 23:32:21,959 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 [2024-09-12 23:32:21,959 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:32:21,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1070557628, now seen corresponding path program 1 times [2024-09-12 23:32:21,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:32:21,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891117642] [2024-09-12 23:32:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:21,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:32:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:32:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 23:32:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 23:32:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 23:32:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 23:32:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 23:32:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 23:32:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 23:32:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 23:32:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 23:32:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 23:32:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-12 23:32:22,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:32:22,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891117642] [2024-09-12 23:32:22,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891117642] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:32:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52978581] [2024-09-12 23:32:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:32:22,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:32:22,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:32:22,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:32:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 23:32:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:32:22,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 23:32:22,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:32:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-12 23:32:22,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:32:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-12 23:32:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52978581] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:32:22,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:32:22,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-12 23:32:22,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751533296] [2024-09-12 23:32:22,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:32:22,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 23:32:22,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:32:22,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 23:32:22,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-12 23:32:22,339 INFO L87 Difference]: Start difference. First operand 178 states and 206 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-12 23:32:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:32:22,542 INFO L93 Difference]: Finished difference Result 190 states and 215 transitions. [2024-09-12 23:32:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 23:32:22,542 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 70 [2024-09-12 23:32:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:32:22,543 INFO L225 Difference]: With dead ends: 190 [2024-09-12 23:32:22,543 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 23:32:22,545 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-09-12 23:32:22,545 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:32:22,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 116 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:32:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 23:32:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 23:32:22,546 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) [2024-09-12 23:32:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 23:32:22,547 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2024-09-12 23:32:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:32:22,547 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 23:32:22,547 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-12 23:32:22,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:32:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 23:32:22,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 23:32:22,550 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 23:32:22,567 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 23:32:22,754 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 [2024-09-12 23:32:22,757 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:32:22,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 23:32:24,525 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 23:32:24,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 11:32:24 BoogieIcfgContainer [2024-09-12 23:32:24,541 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 23:32:24,541 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 23:32:24,542 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 23:32:24,542 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 23:32:24,542 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:32:16" (3/4) ... [2024-09-12 23:32:24,544 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 23:32:24,547 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 23:32:24,547 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-12 23:32:24,547 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 23:32:24,547 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 23:32:24,551 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2024-09-12 23:32:24,551 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-12 23:32:24,551 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-12 23:32:24,551 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 23:32:24,573 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x)) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) [2024-09-12 23:32:24,574 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((1 <= r) && (((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x))) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) [2024-09-12 23:32:24,636 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 23:32:24,636 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 23:32:24,636 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 23:32:24,637 INFO L158 Benchmark]: Toolchain (without parser) took 8820.22ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 99.2MB in the beginning and 144.9MB in the end (delta: -45.6MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2024-09-12 23:32:24,637 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 100.7MB. Free memory is still 66.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 23:32:24,637 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.72ms. Allocated memory is still 146.8MB. Free memory was 98.8MB in the beginning and 87.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-12 23:32:24,637 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.75ms. Allocated memory is still 146.8MB. Free memory was 87.5MB in the beginning and 86.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 23:32:24,638 INFO L158 Benchmark]: Boogie Preprocessor took 35.03ms. Allocated memory is still 146.8MB. Free memory was 86.3MB in the beginning and 84.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 23:32:24,638 INFO L158 Benchmark]: RCFGBuilder took 323.78ms. Allocated memory is still 146.8MB. Free memory was 84.6MB in the beginning and 110.1MB in the end (delta: -25.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-09-12 23:32:24,639 INFO L158 Benchmark]: TraceAbstraction took 8124.32ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 109.3MB in the beginning and 149.0MB in the end (delta: -39.8MB). Peak memory consumption was 118.9MB. Max. memory is 16.1GB. [2024-09-12 23:32:24,639 INFO L158 Benchmark]: Witness Printer took 94.83ms. Allocated memory is still 211.8MB. Free memory was 149.0MB in the beginning and 144.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-12 23:32:24,640 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 100.7MB. Free memory is still 66.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.72ms. Allocated memory is still 146.8MB. Free memory was 98.8MB in the beginning and 87.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.75ms. Allocated memory is still 146.8MB. Free memory was 87.5MB in the beginning and 86.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.03ms. Allocated memory is still 146.8MB. Free memory was 86.3MB in the beginning and 84.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 323.78ms. Allocated memory is still 146.8MB. Free memory was 84.6MB in the beginning and 110.1MB in the end (delta: -25.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8124.32ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 109.3MB in the beginning and 149.0MB in the end (delta: -39.8MB). Peak memory consumption was 118.9MB. Max. memory is 16.1GB. * Witness Printer took 94.83ms. Allocated memory is still 211.8MB. Free memory was 149.0MB in the beginning and 144.9MB 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 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 312 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 278 mSDsluCounter, 1280 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 949 mSDsCounter, 150 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 968 IncrementalHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 150 mSolverCounterUnsat, 331 mSDtfsCounter, 968 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 615 GetRequests, 510 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=9, InterpolantAutomatonStates: 84, 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, 11 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 682 NumberOfCodeBlocks, 682 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1741 SizeOfPredicates, 14 NumberOfNonLiveVariables, 817 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 905/967 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: 46]: Loop Invariant Derived loop invariant: (((((1 <= r) && (((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x))) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x)) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Requires: (counter == 0) Ensures: ((\old(cond) != 0) && (counter == 0)) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - 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! [2024-09-12 23:32:24,663 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE