./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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/cohencu-ll_valuebound100.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 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:57:09,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:57:09,831 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:57:09,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:57:09,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:57:09,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:57:09,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:57:09,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:57:09,873 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:57:09,873 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:57:09,874 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:57:09,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:57:09,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:57:09,876 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:57:09,878 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:57:09,878 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:57:09,878 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:57:09,879 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:57:09,879 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:57:09,879 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:57:09,879 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:57:09,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:57:09,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:57:09,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:57:09,884 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:57:09,884 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:57:09,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:57:09,885 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:57:09,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:57:09,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:57:09,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:57:09,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:57:09,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:57:09,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:57:09,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:57:09,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:57:09,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:57:09,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:57:09,888 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:57:09,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:57:09,889 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:57:09,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:57:09,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:57:10,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:57:10,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:57:10,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:57:10,179 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:57:10,180 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:57:10,181 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2024-09-18 15:57:11,599 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:57:11,793 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:57:11,793 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2024-09-18 15:57:11,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a458a2f46/33d22c485a35423eab0d735cc6be8472/FLAG86eea9b2f [2024-09-18 15:57:12,158 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a458a2f46/33d22c485a35423eab0d735cc6be8472 [2024-09-18 15:57:12,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:57:12,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:57:12,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:57:12,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:57:12,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:57:12,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3119af82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12, skipping insertion in model container [2024-09-18 15:57:12,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,187 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:57:12,345 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2024-09-18 15:57:12,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:57:12,376 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:57:12,388 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2024-09-18 15:57:12,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:57:12,417 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:57:12,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12 WrapperNode [2024-09-18 15:57:12,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:57:12,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:57:12,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:57:12,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:57:12,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,444 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:57:12,444 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:57:12,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:57:12,445 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:57:12,445 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:57:12,454 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,455 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,466 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]. [2024-09-18 15:57:12,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,473 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:57:12,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:57:12,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:57:12,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:57:12,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (1/1) ... [2024-09-18 15:57:12,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:57:12,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:12,501 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) [2024-09-18 15:57:12,503 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 [2024-09-18 15:57:12,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:57:12,539 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 15:57:12,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 15:57:12,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:57:12,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:57:12,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:57:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:57:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:57:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:57:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:57:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:57:12,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:57:12,591 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:57:12,592 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:57:12,729 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 15:57:12,729 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:57:12,746 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:57:12,746 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 15:57:12,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:57:12 BoogieIcfgContainer [2024-09-18 15:57:12,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:57:12,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:57:12,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:57:12,752 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:57:12,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:57:12" (1/3) ... [2024-09-18 15:57:12,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac001b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:57:12, skipping insertion in model container [2024-09-18 15:57:12,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:57:12" (2/3) ... [2024-09-18 15:57:12,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac001b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:57:12, skipping insertion in model container [2024-09-18 15:57:12,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:57:12" (3/3) ... [2024-09-18 15:57:12,755 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound100.c [2024-09-18 15:57:12,769 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:57:12,769 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:57:12,827 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:57:12,833 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;@7227cb6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:57:12,834 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:57:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-18 15:57:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 15:57:12,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:12,847 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:57:12,847 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:12,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1802650881, now seen corresponding path program 1 times [2024-09-18 15:57:12,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:12,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029274067] [2024-09-18 15:57:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:12,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:12,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:57:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:12,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:57:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:57:13,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:13,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029274067] [2024-09-18 15:57:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029274067] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:57:13,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:57:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:57:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536933553] [2024-09-18 15:57:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:57:13,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:57:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:57:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:57:13,036 INFO L87 Difference]: Start difference. First operand has 34 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:57:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:13,059 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2024-09-18 15:57:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:57:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 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 [2024-09-18 15:57:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:13,066 INFO L225 Difference]: With dead ends: 60 [2024-09-18 15:57:13,066 INFO L226 Difference]: Without dead ends: 30 [2024-09-18 15:57:13,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:57:13,073 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:13,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:57:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-18 15:57:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-18 15:57:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:57:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-09-18 15:57:13,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 16 [2024-09-18 15:57:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:13,107 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-09-18 15:57:13,108 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:57:13,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-09-18 15:57:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 15:57:13,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:13,109 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:57:13,110 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:57:13,110 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:13,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1133972673, now seen corresponding path program 1 times [2024-09-18 15:57:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:13,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933417485] [2024-09-18 15:57:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:13,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:57:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:13,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:57:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:57:13,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:13,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933417485] [2024-09-18 15:57:13,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933417485] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:57:13,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:57:13,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:57:13,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557504818] [2024-09-18 15:57:13,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:57:13,430 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:57:13,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:57:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:57:13,432 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-09-18 15:57:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:13,553 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-09-18 15:57:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:57:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 16 [2024-09-18 15:57:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:13,556 INFO L225 Difference]: With dead ends: 36 [2024-09-18 15:57:13,556 INFO L226 Difference]: Without dead ends: 34 [2024-09-18 15:57:13,557 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 [2024-09-18 15:57:13,558 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:13,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:57:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-18 15:57:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-18 15:57:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:57:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-18 15:57:13,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 16 [2024-09-18 15:57:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:13,581 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-18 15:57:13,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-09-18 15:57:13,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-18 15:57:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 15:57:13,583 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:13,583 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] [2024-09-18 15:57:13,583 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:57:13,584 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:13,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash -295453008, now seen corresponding path program 1 times [2024-09-18 15:57:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118873354] [2024-09-18 15:57:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50134615] [2024-09-18 15:57:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:13,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:13,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:13,616 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) [2024-09-18 15:57:13,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:57:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:13,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:57:13,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:57:13,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:57:13,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:13,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118873354] [2024-09-18 15:57:13,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:13,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50134615] [2024-09-18 15:57:13,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50134615] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:57:13,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:57:13,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:57:13,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942841350] [2024-09-18 15:57:13,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:57:13,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:57:13,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:57:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:57:13,837 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-09-18 15:57:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:13,930 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-18 15:57:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:57:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 21 [2024-09-18 15:57:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:13,933 INFO L225 Difference]: With dead ends: 53 [2024-09-18 15:57:13,934 INFO L226 Difference]: Without dead ends: 51 [2024-09-18 15:57:13,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:57:13,935 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:13,937 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:57:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-18 15:57:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2024-09-18 15:57:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-18 15:57:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-18 15:57:13,961 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 21 [2024-09-18 15:57:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:13,963 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-18 15:57:13,963 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-09-18 15:57:13,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-18 15:57:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:57:13,965 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:13,965 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] [2024-09-18 15:57:13,984 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 15:57:14,166 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 [2024-09-18 15:57:14,166 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:14,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 291539359, now seen corresponding path program 1 times [2024-09-18 15:57:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:14,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967667302] [2024-09-18 15:57:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:14,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073295680] [2024-09-18 15:57:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:14,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:14,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:14,185 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) [2024-09-18 15:57:14,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:57:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:14,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:57:14,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:57:14,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:57:14,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:14,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967667302] [2024-09-18 15:57:14,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:14,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073295680] [2024-09-18 15:57:14,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073295680] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:57:14,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:57:14,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:57:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785829389] [2024-09-18 15:57:14,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:57:14,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:57:14,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:57:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:57:14,302 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:57:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:14,370 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-09-18 15:57:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:57:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-18 15:57:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:14,372 INFO L225 Difference]: With dead ends: 57 [2024-09-18 15:57:14,372 INFO L226 Difference]: Without dead ends: 55 [2024-09-18 15:57:14,372 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:57:14,373 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:14,373 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:57:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-18 15:57:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-09-18 15:57:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-18 15:57:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-18 15:57:14,388 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2024-09-18 15:57:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:14,388 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-18 15:57:14,388 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:57:14,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-18 15:57:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:57:14,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:14,390 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:57:14,406 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:57:14,594 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 [2024-09-18 15:57:14,595 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:14,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1228581936, now seen corresponding path program 1 times [2024-09-18 15:57:14,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:14,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35082618] [2024-09-18 15:57:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:14,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814391074] [2024-09-18 15:57:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:14,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:14,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:14,630 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) [2024-09-18 15:57:14,633 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:57:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:14,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:57:14,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:57:14,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:57:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:14,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35082618] [2024-09-18 15:57:14,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:14,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814391074] [2024-09-18 15:57:14,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814391074] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:57:14,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:57:14,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:57:14,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373251245] [2024-09-18 15:57:14,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:57:14,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:57:14,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:57:14,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:57:14,768 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:57:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:14,860 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-18 15:57:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:57:14,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-18 15:57:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:14,862 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:57:14,862 INFO L226 Difference]: Without dead ends: 53 [2024-09-18 15:57:14,863 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:57:14,864 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:14,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:57:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-18 15:57:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-18 15:57:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 15:57:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-18 15:57:14,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 31 [2024-09-18 15:57:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:14,881 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-18 15:57:14,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:57:14,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-18 15:57:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 15:57:14,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:14,884 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-09-18 15:57:14,899 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:57:15,087 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 [2024-09-18 15:57:15,088 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:15,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:15,088 INFO L85 PathProgramCache]: Analyzing trace with hash 149987423, now seen corresponding path program 1 times [2024-09-18 15:57:15,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:15,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876115128] [2024-09-18 15:57:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:15,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:15,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410080928] [2024-09-18 15:57:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:15,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:15,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:15,131 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) [2024-09-18 15:57:15,133 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:57:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:15,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:57:15,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:57:15,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:57:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:57:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876115128] [2024-09-18 15:57:15,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410080928] [2024-09-18 15:57:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410080928] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:57:15,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:57:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-18 15:57:15,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380234308] [2024-09-18 15:57:15,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:57:15,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:57:15,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:15,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:57:15,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:57:15,587 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-18 15:57:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:15,845 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-18 15:57:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:57:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2024-09-18 15:57:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:15,847 INFO L225 Difference]: With dead ends: 76 [2024-09-18 15:57:15,847 INFO L226 Difference]: Without dead ends: 74 [2024-09-18 15:57:15,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-18 15:57:15,848 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:15,849 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:57:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-18 15:57:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-09-18 15:57:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 15:57:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-09-18 15:57:15,869 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 48 [2024-09-18 15:57:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:15,869 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-09-18 15:57:15,869 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2024-09-18 15:57:15,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-09-18 15:57:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-18 15:57:15,871 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:15,871 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:57:15,888 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:57:16,071 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:16,072 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:16,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash -883401392, now seen corresponding path program 2 times [2024-09-18 15:57:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:16,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965980453] [2024-09-18 15:57:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:16,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248623263] [2024-09-18 15:57:16,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:57:16,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:16,096 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) [2024-09-18 15:57:16,099 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:57:16,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:57:16,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:57:16,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:57:16,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:57:16,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:57:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:57:16,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965980453] [2024-09-18 15:57:16,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248623263] [2024-09-18 15:57:16,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248623263] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:57:16,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:57:16,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-18 15:57:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720201398] [2024-09-18 15:57:16,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:57:16,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:57:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:57:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:57:16,478 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-18 15:57:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:16,779 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2024-09-18 15:57:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 15:57:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2024-09-18 15:57:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:16,782 INFO L225 Difference]: With dead ends: 88 [2024-09-18 15:57:16,782 INFO L226 Difference]: Without dead ends: 86 [2024-09-18 15:57:16,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:57:16,783 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:16,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:57:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-18 15:57:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-09-18 15:57:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-18 15:57:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-09-18 15:57:16,819 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 53 [2024-09-18 15:57:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:16,821 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-09-18 15:57:16,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-18 15:57:16,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-09-18 15:57:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 15:57:16,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:16,825 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-09-18 15:57:16,843 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:57:17,025 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 15:57:17,026 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:17,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash -607967553, now seen corresponding path program 3 times [2024-09-18 15:57:17,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:17,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006983679] [2024-09-18 15:57:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:17,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:17,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92788134] [2024-09-18 15:57:17,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:57:17,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:17,050 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) [2024-09-18 15:57:17,052 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:57:17,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-18 15:57:17,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:57:17,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:57:17,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:57:17,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:57:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:57:17,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006983679] [2024-09-18 15:57:17,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:17,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92788134] [2024-09-18 15:57:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92788134] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:57:17,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:57:17,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-09-18 15:57:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781849223] [2024-09-18 15:57:17,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:57:17,408 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 15:57:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 15:57:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:57:17,409 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-18 15:57:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:17,725 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2024-09-18 15:57:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:57:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 58 [2024-09-18 15:57:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:17,727 INFO L225 Difference]: With dead ends: 96 [2024-09-18 15:57:17,727 INFO L226 Difference]: Without dead ends: 84 [2024-09-18 15:57:17,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:57:17,728 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:17,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 205 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:57:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-18 15:57:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2024-09-18 15:57:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 16 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-18 15:57:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-09-18 15:57:17,760 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 58 [2024-09-18 15:57:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:17,760 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-09-18 15:57:17,761 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-18 15:57:17,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-09-18 15:57:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-18 15:57:17,762 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:17,763 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 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] [2024-09-18 15:57:17,780 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:57:17,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:17,964 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:17,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:17,964 INFO L85 PathProgramCache]: Analyzing trace with hash -612037408, now seen corresponding path program 1 times [2024-09-18 15:57:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927328944] [2024-09-18 15:57:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:18,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310206660] [2024-09-18 15:57:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:18,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:18,002 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) [2024-09-18 15:57:18,005 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:57:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:18,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:57:18,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:57:18,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:57:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:57:18,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:18,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927328944] [2024-09-18 15:57:18,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:18,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310206660] [2024-09-18 15:57:18,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310206660] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:57:18,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:57:18,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-18 15:57:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315955788] [2024-09-18 15:57:18,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:57:18,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 15:57:18,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:18,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 15:57:18,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:57:18,748 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-18 15:57:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:19,007 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2024-09-18 15:57:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:57:19,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 74 [2024-09-18 15:57:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:19,009 INFO L225 Difference]: With dead ends: 104 [2024-09-18 15:57:19,012 INFO L226 Difference]: Without dead ends: 102 [2024-09-18 15:57:19,012 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:57:19,012 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:19,013 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 171 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:57:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-18 15:57:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-09-18 15:57:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-18 15:57:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2024-09-18 15:57:19,058 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 74 [2024-09-18 15:57:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:19,058 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2024-09-18 15:57:19,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-18 15:57:19,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2024-09-18 15:57:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-18 15:57:19,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:19,060 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 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] [2024-09-18 15:57:19,077 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:57:19,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:19,265 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:19,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1655042001, now seen corresponding path program 1 times [2024-09-18 15:57:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:19,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700572112] [2024-09-18 15:57:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:19,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930836422] [2024-09-18 15:57:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:19,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:19,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:57:19,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:57:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:57:19,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-18 15:57:19,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:57:19,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:57:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:57:19,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700572112] [2024-09-18 15:57:19,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930836422] [2024-09-18 15:57:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930836422] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:57:19,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:57:19,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-18 15:57:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258658160] [2024-09-18 15:57:19,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:57:19,782 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:57:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:57:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:57:19,783 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-18 15:57:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:20,214 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2024-09-18 15:57:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:57:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 79 [2024-09-18 15:57:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:20,216 INFO L225 Difference]: With dead ends: 116 [2024-09-18 15:57:20,216 INFO L226 Difference]: Without dead ends: 96 [2024-09-18 15:57:20,216 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:57:20,217 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:20,217 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 240 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:57:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-18 15:57:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-09-18 15:57:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-18 15:57:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-09-18 15:57:20,253 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 79 [2024-09-18 15:57:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:20,254 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-09-18 15:57:20,254 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2024-09-18 15:57:20,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-09-18 15:57:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-18 15:57:20,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:20,257 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:57:20,278 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 15:57:20,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:20,458 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:20,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2107835968, now seen corresponding path program 2 times [2024-09-18 15:57:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:20,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241710906] [2024-09-18 15:57:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:20,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618543958] [2024-09-18 15:57:20,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:57:20,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:20,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:57:20,499 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:57:20,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:57:20,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:57:20,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-18 15:57:20,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 86 proven. 58 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-09-18 15:57:20,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:57:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-09-18 15:57:21,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:21,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241710906] [2024-09-18 15:57:21,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:21,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618543958] [2024-09-18 15:57:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618543958] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:57:21,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:57:21,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-18 15:57:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583564049] [2024-09-18 15:57:21,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:57:21,587 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 15:57:21,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 15:57:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-18 15:57:21,588 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-18 15:57:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:22,169 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2024-09-18 15:57:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:57:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 128 [2024-09-18 15:57:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:22,172 INFO L225 Difference]: With dead ends: 118 [2024-09-18 15:57:22,172 INFO L226 Difference]: Without dead ends: 114 [2024-09-18 15:57:22,173 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:57:22,173 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:22,173 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 277 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:57:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-18 15:57:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2024-09-18 15:57:22,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-18 15:57:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2024-09-18 15:57:22,215 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 128 [2024-09-18 15:57:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:22,218 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2024-09-18 15:57:22,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-18 15:57:22,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2024-09-18 15:57:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-18 15:57:22,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:57:22,220 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:57:22,238 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-18 15:57:22,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 15:57:22,420 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:57:22,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1340142287, now seen corresponding path program 2 times [2024-09-18 15:57:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:57:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312619945] [2024-09-18 15:57:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:57:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:57:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:57:22,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430118790] [2024-09-18 15:57:22,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:57:22,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:57:22,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:57:22,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:57:22,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:57:22,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:57:22,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:57:22,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-18 15:57:22,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-18 15:57:22,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:57:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 40 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2024-09-18 15:57:23,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:57:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312619945] [2024-09-18 15:57:23,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:57:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430118790] [2024-09-18 15:57:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430118790] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:57:23,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:57:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2024-09-18 15:57:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158612620] [2024-09-18 15:57:23,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:57:23,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:57:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:57:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:57:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:57:23,482 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-18 15:57:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:57:24,092 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-09-18 15:57:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:57:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) Word has length 133 [2024-09-18 15:57:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:57:24,093 INFO L225 Difference]: With dead ends: 126 [2024-09-18 15:57:24,093 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 15:57:24,094 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:57:24,095 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:57:24,095 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 254 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:57:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 15:57:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 15:57:24,097 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) [2024-09-18 15:57:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 15:57:24,097 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2024-09-18 15:57:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:57:24,097 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 15:57:24,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-18 15:57:24,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:57:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 15:57:24,098 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 15:57:24,100 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 15:57:24,113 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 15:57:24,302 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 15:57:24,305 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2024-09-18 15:57:24,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 15:57:38,011 WARN L293 SmtUtils]: Spent 12.84s on a formula simplification. DAG size of input: 108 DAG size of output: 45 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-18 15:57:40,140 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 15:57:40,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 03:57:40 BoogieIcfgContainer [2024-09-18 15:57:40,156 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 15:57:40,156 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 15:57:40,156 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 15:57:40,156 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 15:57:40,157 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:57:12" (3/4) ... [2024-09-18 15:57:40,158 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 15:57:40,206 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 15:57:40,206 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 15:57:40,206 INFO L158 Benchmark]: Toolchain (without parser) took 28044.68ms. Allocated memory was 125.8MB in the beginning and 195.0MB in the end (delta: 69.2MB). Free memory was 57.2MB in the beginning and 147.1MB in the end (delta: -89.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 15:57:40,206 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 96.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 15:57:40,207 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.20ms. Allocated memory was 125.8MB in the beginning and 161.5MB in the end (delta: 35.7MB). Free memory was 56.9MB in the beginning and 131.1MB in the end (delta: -74.3MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2024-09-18 15:57:40,207 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.98ms. Allocated memory is still 161.5MB. Free memory was 131.1MB in the beginning and 129.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 15:57:40,207 INFO L158 Benchmark]: Boogie Preprocessor took 29.80ms. Allocated memory is still 161.5MB. Free memory was 129.5MB in the beginning and 128.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 15:57:40,207 INFO L158 Benchmark]: RCFGBuilder took 271.70ms. Allocated memory is still 161.5MB. Free memory was 128.2MB in the beginning and 113.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-18 15:57:40,207 INFO L158 Benchmark]: TraceAbstraction took 27406.66ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 112.7MB in the beginning and 149.2MB in the end (delta: -36.5MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. [2024-09-18 15:57:40,208 INFO L158 Benchmark]: Witness Printer took 49.64ms. Allocated memory is still 195.0MB. Free memory was 149.2MB in the beginning and 147.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 15:57:40,209 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 96.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.20ms. Allocated memory was 125.8MB in the beginning and 161.5MB in the end (delta: 35.7MB). Free memory was 56.9MB in the beginning and 131.1MB in the end (delta: -74.3MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.98ms. Allocated memory is still 161.5MB. Free memory was 131.1MB in the beginning and 129.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.80ms. Allocated memory is still 161.5MB. Free memory was 129.5MB in the beginning and 128.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 271.70ms. Allocated memory is still 161.5MB. Free memory was 128.2MB in the beginning and 113.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 27406.66ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 112.7MB in the beginning and 149.2MB in the end (delta: -36.5MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. * Witness Printer took 49.64ms. Allocated memory is still 195.0MB. Free memory was 149.2MB in the beginning and 147.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 12, TraceHistogramMax: 23, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 1967 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1539 mSDsCounter, 285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1326 IncrementalHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 285 mSolverCounterUnsat, 428 mSDtfsCounter, 1326 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1264 GetRequests, 1134 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=11, InterpolantAutomatonStates: 98, 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, 12 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1334 NumberOfCodeBlocks, 1304 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1237 ConstructedInterpolants, 0 QuantifiedInterpolants, 4768 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 206 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 5309/5604 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((((((__int128) y * 2) == (2 + ((__int128) n * z))) && (((((3 * ((__int128) n * n)) + (((__int128) n * n) * n)) + ((__int128) n * 3)) + 1) == ((__int128) y + x))) && (a <= 100)) && ((((__int128) n * 6) + 6) == z)) && (0 <= a)) && ((n < (a + 1)) || (((__int128) z * x) == (((__int128) x * 12) + (((__int128) a * x) * 6))))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 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! [2024-09-18 15:57:40,227 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE