./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.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 d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:46:20,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:46:20,766 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:46:20,772 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:46:20,775 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:46:20,798 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:46:20,798 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:46:20,798 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:46:20,799 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:46:20,799 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:46:20,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:46:20,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:46:20,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:46:20,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:46:20,801 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:46:20,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:46:20,801 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:46:20,801 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:46:20,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:46:20,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:46:20,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:46:20,802 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:46:20,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:46:20,803 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:46:20,803 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:46:20,803 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:46:20,804 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:46:20,804 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:46:20,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:46:20,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:46:20,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:46:20,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:46:20,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:46:20,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:46:20,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:46:20,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:46:20,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:46:20,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:46:20,806 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:46:20,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:46:20,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:46:20,810 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:46:20,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:46:21,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:46:21,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:46:21,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:46:21,109 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:46:21,113 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:46:21,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2024-09-12 15:46:22,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:46:22,543 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:46:22,543 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2024-09-12 15:46:22,549 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/363ea40d3/a6e49eec338548f3a12fb651a2b4551b/FLAGb5050c7ba [2024-09-12 15:46:22,948 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/363ea40d3/a6e49eec338548f3a12fb651a2b4551b [2024-09-12 15:46:22,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:46:22,950 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:46:22,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:46:22,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:46:22,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:46:22,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:46:22" (1/1) ... [2024-09-12 15:46:22,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dcbe858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:22, skipping insertion in model container [2024-09-12 15:46:22,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:46:22" (1/1) ... [2024-09-12 15:46:22,970 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:46:23,099 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2024-09-12 15:46:23,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:46:23,126 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:46:23,135 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2024-09-12 15:46:23,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:46:23,162 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:46:23,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23 WrapperNode [2024-09-12 15:46:23,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:46:23,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:46:23,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:46:23,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:46:23,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,183 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:46:23,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:46:23,185 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:46:23,185 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:46:23,185 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:46:23,192 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,192 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,203 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 15:46:23,203 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:46:23,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:46:23,216 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:46:23,216 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:46:23,217 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (1/1) ... [2024-09-12 15:46:23,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:46:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:23,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 15:46:23,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 15:46:23,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:46:23,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 15:46:23,277 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 15:46:23,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:46:23,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:46:23,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:46:23,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:46:23,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:46:23,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:46:23,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:46:23,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:46:23,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:46:23,326 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:46:23,328 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:46:23,480 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 15:46:23,480 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:46:23,497 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:46:23,498 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 15:46:23,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:46:23 BoogieIcfgContainer [2024-09-12 15:46:23,499 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:46:23,500 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:46:23,502 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:46:23,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:46:23,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:46:22" (1/3) ... [2024-09-12 15:46:23,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b81ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:46:23, skipping insertion in model container [2024-09-12 15:46:23,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:46:23" (2/3) ... [2024-09-12 15:46:23,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b81ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:46:23, skipping insertion in model container [2024-09-12 15:46:23,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:46:23" (3/3) ... [2024-09-12 15:46:23,507 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2024-09-12 15:46:23,519 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:46:23,519 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:46:23,562 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:46:23,569 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;@6f246e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:46:23,569 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:46:23,572 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) [2024-09-12 15:46:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 15:46:23,578 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:23,579 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:46:23,580 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:23,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1802650881, now seen corresponding path program 1 times [2024-09-12 15:46:23,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:23,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373255588] [2024-09-12 15:46:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:23,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:46:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:23,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:46:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:46:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373255588] [2024-09-12 15:46:23,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373255588] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:46:23,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:46:23,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 15:46:23,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782024624] [2024-09-12 15:46:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:46:23,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 15:46:23,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 15:46:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:46:23,757 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) [2024-09-12 15:46:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:23,778 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2024-09-12 15:46:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 15:46:23,781 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 [2024-09-12 15:46:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:23,786 INFO L225 Difference]: With dead ends: 60 [2024-09-12 15:46:23,786 INFO L226 Difference]: Without dead ends: 30 [2024-09-12 15:46:23,789 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 [2024-09-12 15:46:23,791 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 [2024-09-12 15:46:23,792 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] [2024-09-12 15:46:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-12 15:46:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-12 15:46:23,823 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) [2024-09-12 15:46:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-09-12 15:46:23,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 16 [2024-09-12 15:46:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:23,827 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-09-12 15:46:23,827 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) [2024-09-12 15:46:23,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-09-12 15:46:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 15:46:23,830 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:23,830 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:46:23,831 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:46:23,831 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:23,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1133972673, now seen corresponding path program 1 times [2024-09-12 15:46:23,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:23,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093871919] [2024-09-12 15:46:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:24,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:46:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:24,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:46:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:46:24,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:24,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093871919] [2024-09-12 15:46:24,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093871919] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:46:24,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:46:24,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:46:24,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837192017] [2024-09-12 15:46:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:46:24,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:46:24,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:46:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:46:24,069 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) [2024-09-12 15:46:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:24,164 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-09-12 15:46:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:46:24,164 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 [2024-09-12 15:46:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:24,165 INFO L225 Difference]: With dead ends: 36 [2024-09-12 15:46:24,165 INFO L226 Difference]: Without dead ends: 34 [2024-09-12 15:46:24,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:46:24,167 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 [2024-09-12 15:46:24,167 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] [2024-09-12 15:46:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-12 15:46:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-12 15:46:24,175 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) [2024-09-12 15:46:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-12 15:46:24,176 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 16 [2024-09-12 15:46:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:24,177 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-12 15:46:24,177 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) [2024-09-12 15:46:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-12 15:46:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 15:46:24,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:24,178 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] [2024-09-12 15:46:24,178 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:46:24,179 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:24,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:24,179 INFO L85 PathProgramCache]: Analyzing trace with hash -295453008, now seen corresponding path program 1 times [2024-09-12 15:46:24,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:24,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675805644] [2024-09-12 15:46:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:24,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:24,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220209489] [2024-09-12 15:46:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:24,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:24,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:24,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:46:24,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:46:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:24,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:46:24,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:46:24,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:46:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:24,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675805644] [2024-09-12 15:46:24,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:24,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220209489] [2024-09-12 15:46:24,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220209489] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:46:24,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:46:24,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:46:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937940378] [2024-09-12 15:46:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:46:24,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:46:24,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:46:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:46:24,288 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) [2024-09-12 15:46:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:24,335 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-12 15:46:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:46:24,337 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 [2024-09-12 15:46:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:24,338 INFO L225 Difference]: With dead ends: 53 [2024-09-12 15:46:24,340 INFO L226 Difference]: Without dead ends: 51 [2024-09-12 15:46:24,340 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 [2024-09-12 15:46:24,341 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:24,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:46:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-12 15:46:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2024-09-12 15:46:24,359 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) [2024-09-12 15:46:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-12 15:46:24,360 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 21 [2024-09-12 15:46:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:24,364 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-12 15:46:24,364 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) [2024-09-12 15:46:24,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-12 15:46:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 15:46:24,366 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:24,366 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] [2024-09-12 15:46:24,380 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 15:46:24,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:24,571 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:24,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash 291539359, now seen corresponding path program 1 times [2024-09-12 15:46:24,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:24,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695157555] [2024-09-12 15:46:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:24,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:24,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774453202] [2024-09-12 15:46:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:24,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:24,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:46:24,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:46:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:24,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:46:24,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:46:24,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:46:24,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695157555] [2024-09-12 15:46:24,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:24,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774453202] [2024-09-12 15:46:24,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774453202] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:46:24,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:46:24,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:46:24,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610193318] [2024-09-12 15:46:24,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:46:24,683 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:46:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:24,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:46:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:46:24,684 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) [2024-09-12 15:46:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:24,809 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-09-12 15:46:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:46:24,809 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 [2024-09-12 15:46:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:24,811 INFO L225 Difference]: With dead ends: 57 [2024-09-12 15:46:24,811 INFO L226 Difference]: Without dead ends: 55 [2024-09-12 15:46:24,814 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 [2024-09-12 15:46:24,814 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:24,815 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:46:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-12 15:46:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-09-12 15:46:24,829 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) [2024-09-12 15:46:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-12 15:46:24,832 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2024-09-12 15:46:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:24,832 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-12 15:46:24,832 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) [2024-09-12 15:46:24,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-12 15:46:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 15:46:24,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:24,835 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] [2024-09-12 15:46:24,848 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 15:46:25,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:25,036 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:25,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1228581936, now seen corresponding path program 1 times [2024-09-12 15:46:25,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:25,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251706908] [2024-09-12 15:46:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:25,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315213808] [2024-09-12 15:46:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:25,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:25,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:46:25,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:46:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:25,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:46:25,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:46:25,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:46:25,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251706908] [2024-09-12 15:46:25,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315213808] [2024-09-12 15:46:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315213808] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:46:25,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:46:25,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:46:25,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679857607] [2024-09-12 15:46:25,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:46:25,163 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:46:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:46:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:46:25,164 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) [2024-09-12 15:46:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:25,222 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-12 15:46:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:46:25,222 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 [2024-09-12 15:46:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:25,223 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:46:25,223 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 15:46:25,223 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 [2024-09-12 15:46:25,224 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:25,224 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:46:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 15:46:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-12 15:46:25,232 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) [2024-09-12 15:46:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-12 15:46:25,233 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 31 [2024-09-12 15:46:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:25,233 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-12 15:46:25,233 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) [2024-09-12 15:46:25,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-12 15:46:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:46:25,234 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:25,234 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] [2024-09-12 15:46:25,249 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 15:46:25,438 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:25,439 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:25,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 149987423, now seen corresponding path program 1 times [2024-09-12 15:46:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:25,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665409016] [2024-09-12 15:46:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:25,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957360395] [2024-09-12 15:46:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:25,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:25,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:46:25,474 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:46:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:25,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 15:46:25,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 15:46:25,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:46:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 15:46:25,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:25,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665409016] [2024-09-12 15:46:25,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:25,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957360395] [2024-09-12 15:46:25,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957360395] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:46:25,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:46:25,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-12 15:46:25,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993472055] [2024-09-12 15:46:25,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:46:25,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 15:46:25,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 15:46:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:46:25,786 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) [2024-09-12 15:46:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:25,977 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-12 15:46:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:46:25,977 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 [2024-09-12 15:46:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:25,978 INFO L225 Difference]: With dead ends: 76 [2024-09-12 15:46:25,978 INFO L226 Difference]: Without dead ends: 74 [2024-09-12 15:46:25,979 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 [2024-09-12 15:46:25,979 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:25,979 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 133 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:46:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-12 15:46:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-09-12 15:46:26,014 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) [2024-09-12 15:46:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-09-12 15:46:26,018 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 48 [2024-09-12 15:46:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:26,019 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-09-12 15:46:26,020 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) [2024-09-12 15:46:26,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-09-12 15:46:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:46:26,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:26,021 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] [2024-09-12 15:46:26,034 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:46:26,226 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 [2024-09-12 15:46:26,226 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:26,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:26,227 INFO L85 PathProgramCache]: Analyzing trace with hash -883401392, now seen corresponding path program 2 times [2024-09-12 15:46:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:26,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365332364] [2024-09-12 15:46:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:26,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598139984] [2024-09-12 15:46:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:46:26,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:26,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:46:26,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:46:26,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:46:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:46:26,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 15:46:26,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 15:46:26,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:46:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 15:46:26,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:26,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365332364] [2024-09-12 15:46:26,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:26,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598139984] [2024-09-12 15:46:26,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598139984] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:46:26,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:46:26,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-12 15:46:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793806206] [2024-09-12 15:46:26,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:46:26,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 15:46:26,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 15:46:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:46:26,551 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) [2024-09-12 15:46:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:26,769 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2024-09-12 15:46:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:46:26,770 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 [2024-09-12 15:46:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:26,771 INFO L225 Difference]: With dead ends: 88 [2024-09-12 15:46:26,771 INFO L226 Difference]: Without dead ends: 86 [2024-09-12 15:46:26,771 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 [2024-09-12 15:46:26,772 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:26,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:46:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-12 15:46:26,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-09-12 15:46:26,791 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) [2024-09-12 15:46:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-09-12 15:46:26,791 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 53 [2024-09-12 15:46:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:26,792 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-09-12 15:46:26,792 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) [2024-09-12 15:46:26,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-09-12 15:46:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:46:26,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:26,793 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] [2024-09-12 15:46:26,807 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:46:26,993 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 [2024-09-12 15:46:26,994 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:26,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash -607967553, now seen corresponding path program 3 times [2024-09-12 15:46:26,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:26,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327288781] [2024-09-12 15:46:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:26,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:27,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190371595] [2024-09-12 15:46:27,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:46:27,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:27,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:46:27,035 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:46:27,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 15:46:27,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:46:27,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:46:27,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:46:27,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:46:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:46:27,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327288781] [2024-09-12 15:46:27,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190371595] [2024-09-12 15:46:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190371595] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:46:27,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:46:27,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-09-12 15:46:27,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685787160] [2024-09-12 15:46:27,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:46:27,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 15:46:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:27,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 15:46:27,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:46:27,376 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) [2024-09-12 15:46:27,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:27,599 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2024-09-12 15:46:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 15:46:27,599 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 [2024-09-12 15:46:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:27,600 INFO L225 Difference]: With dead ends: 96 [2024-09-12 15:46:27,601 INFO L226 Difference]: Without dead ends: 84 [2024-09-12 15:46:27,601 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-09-12 15:46:27,602 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:27,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 205 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:46:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-12 15:46:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2024-09-12 15:46:27,623 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) [2024-09-12 15:46:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-09-12 15:46:27,624 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 58 [2024-09-12 15:46:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:27,624 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-09-12 15:46:27,625 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) [2024-09-12 15:46:27,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:27,626 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-09-12 15:46:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 15:46:27,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:27,627 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] [2024-09-12 15:46:27,650 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 15:46:27,827 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 [2024-09-12 15:46:27,828 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:27,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash -612037408, now seen corresponding path program 1 times [2024-09-12 15:46:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:27,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580870176] [2024-09-12 15:46:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:27,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383404787] [2024-09-12 15:46:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:27,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:27,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:27,851 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:46:27,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:46:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:27,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:46:27,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:46:28,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:46:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:46:28,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:28,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580870176] [2024-09-12 15:46:28,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:28,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383404787] [2024-09-12 15:46:28,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383404787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:46:28,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:46:28,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-12 15:46:28,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172351957] [2024-09-12 15:46:28,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:46:28,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 15:46:28,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 15:46:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:46:28,376 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) [2024-09-12 15:46:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:28,556 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2024-09-12 15:46:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:46:28,556 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 [2024-09-12 15:46:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:28,557 INFO L225 Difference]: With dead ends: 104 [2024-09-12 15:46:28,557 INFO L226 Difference]: Without dead ends: 102 [2024-09-12 15:46:28,557 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 [2024-09-12 15:46:28,558 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:28,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 171 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:46:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-12 15:46:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-09-12 15:46:28,605 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) [2024-09-12 15:46:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2024-09-12 15:46:28,606 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 74 [2024-09-12 15:46:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:28,607 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2024-09-12 15:46:28,607 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) [2024-09-12 15:46:28,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2024-09-12 15:46:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-12 15:46:28,610 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:28,610 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] [2024-09-12 15:46:28,624 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 15:46:28,814 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 [2024-09-12 15:46:28,815 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:28,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:28,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1655042001, now seen corresponding path program 1 times [2024-09-12 15:46:28,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:28,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108159110] [2024-09-12 15:46:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:28,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433516791] [2024-09-12 15:46:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:28,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:28,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:28,845 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) [2024-09-12 15:46:28,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:46:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:46:28,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:46:28,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:46:29,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:46:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:46:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108159110] [2024-09-12 15:46:29,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433516791] [2024-09-12 15:46:29,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433516791] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:46:29,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:46:29,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-12 15:46:29,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022372108] [2024-09-12 15:46:29,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:46:29,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:46:29,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:46:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:46:29,230 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) [2024-09-12 15:46:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:29,447 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2024-09-12 15:46:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:46:29,447 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 [2024-09-12 15:46:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:29,448 INFO L225 Difference]: With dead ends: 116 [2024-09-12 15:46:29,448 INFO L226 Difference]: Without dead ends: 96 [2024-09-12 15:46:29,448 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 [2024-09-12 15:46:29,449 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:29,449 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 240 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:46:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-12 15:46:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-09-12 15:46:29,470 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) [2024-09-12 15:46:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-09-12 15:46:29,471 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 79 [2024-09-12 15:46:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:29,471 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-09-12 15:46:29,471 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) [2024-09-12 15:46:29,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-09-12 15:46:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:46:29,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:29,472 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] [2024-09-12 15:46:29,484 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 15:46:29,673 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 [2024-09-12 15:46:29,673 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:29,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:29,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2107835968, now seen corresponding path program 2 times [2024-09-12 15:46:29,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:29,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546995566] [2024-09-12 15:46:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432364909] [2024-09-12 15:46:29,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:46:29,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:29,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:29,706 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) [2024-09-12 15:46:29,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:46:29,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:46:29,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:46:29,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 15:46:29,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 86 proven. 58 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-09-12 15:46:30,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:46:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-09-12 15:46:30,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:30,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546995566] [2024-09-12 15:46:30,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:30,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432364909] [2024-09-12 15:46:30,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432364909] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:46:30,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:46:30,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-12 15:46:30,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185312949] [2024-09-12 15:46:30,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:46:30,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 15:46:30,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 15:46:30,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-12 15:46:30,743 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) [2024-09-12 15:46:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:31,322 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2024-09-12 15:46:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:46:31,326 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 [2024-09-12 15:46:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:31,331 INFO L225 Difference]: With dead ends: 118 [2024-09-12 15:46:31,331 INFO L226 Difference]: Without dead ends: 114 [2024-09-12 15:46:31,331 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 [2024-09-12 15:46:31,332 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 [2024-09-12 15:46:31,332 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] [2024-09-12 15:46:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-12 15:46:31,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2024-09-12 15:46:31,361 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) [2024-09-12 15:46:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2024-09-12 15:46:31,362 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 128 [2024-09-12 15:46:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:31,362 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2024-09-12 15:46:31,362 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) [2024-09-12 15:46:31,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2024-09-12 15:46:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-12 15:46:31,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:46:31,364 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] [2024-09-12 15:46:31,376 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 15:46:31,567 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 [2024-09-12 15:46:31,567 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:46:31,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1340142287, now seen corresponding path program 2 times [2024-09-12 15:46:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:46:31,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321048974] [2024-09-12 15:46:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:46:31,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:46:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:46:31,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119150691] [2024-09-12 15:46:31,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:46:31,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:46:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:46:31,600 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) [2024-09-12 15:46:31,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 15:46:31,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:46:31,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:46:31,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-12 15:46:31,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:46:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 61 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-09-12 15:46:31,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:46:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 88 proven. 40 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2024-09-12 15:46:32,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:46:32,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321048974] [2024-09-12 15:46:32,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:46:32,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119150691] [2024-09-12 15:46:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119150691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:46:32,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:46:32,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2024-09-12 15:46:32,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80062528] [2024-09-12 15:46:32,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:46:32,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:46:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:46:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:46:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:46:32,714 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) [2024-09-12 15:46:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:33,212 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-09-12 15:46:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:46:33,213 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 [2024-09-12 15:46:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:33,214 INFO L225 Difference]: With dead ends: 126 [2024-09-12 15:46:33,214 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 15:46:33,214 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:46:33,215 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 [2024-09-12 15:46:33,215 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] [2024-09-12 15:46:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 15:46:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 15:46:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-12 15:46:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 15:46:33,216 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2024-09-12 15:46:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:46:33,216 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 15:46:33,216 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) [2024-09-12 15:46:33,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:46:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 15:46:33,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 15:46:33,218 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 15:46:33,231 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 15:46:33,422 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 [2024-09-12 15:46:33,425 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2024-09-12 15:46:33,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 15:46:36,473 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 15:46:36,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 03:46:36 BoogieIcfgContainer [2024-09-12 15:46:36,484 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 15:46:36,485 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 15:46:36,485 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 15:46:36,485 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 15:46:36,485 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:46:23" (3/4) ... [2024-09-12 15:46:36,486 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 15:46:36,488 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 15:46:36,489 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-12 15:46:36,489 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 15:46:36,489 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 15:46:36,491 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-09-12 15:46:36,491 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-09-12 15:46:36,493 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-12 15:46:36,493 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 15:46:36,564 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 15:46:36,564 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 15:46:36,565 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 15:46:36,565 INFO L158 Benchmark]: Toolchain (without parser) took 13614.68ms. Allocated memory was 75.5MB in the beginning and 192.9MB in the end (delta: 117.4MB). Free memory was 36.9MB in the beginning and 80.2MB in the end (delta: -43.2MB). Peak memory consumption was 76.0MB. Max. memory is 16.1GB. [2024-09-12 15:46:36,565 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 75.5MB. Free memory is still 55.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 15:46:36,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.42ms. Allocated memory is still 75.5MB. Free memory was 36.7MB in the beginning and 46.6MB in the end (delta: -9.9MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2024-09-12 15:46:36,566 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.47ms. Allocated memory is still 75.5MB. Free memory was 46.6MB in the beginning and 45.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 15:46:36,566 INFO L158 Benchmark]: Boogie Preprocessor took 30.51ms. Allocated memory is still 75.5MB. Free memory was 45.6MB in the beginning and 44.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 15:46:36,566 INFO L158 Benchmark]: RCFGBuilder took 282.75ms. Allocated memory was 75.5MB in the beginning and 109.1MB in the end (delta: 33.6MB). Free memory was 44.0MB in the beginning and 85.5MB in the end (delta: -41.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-12 15:46:36,566 INFO L158 Benchmark]: TraceAbstraction took 12984.07ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 84.6MB in the beginning and 84.4MB in the end (delta: 193.1kB). Peak memory consumption was 115.3MB. Max. memory is 16.1GB. [2024-09-12 15:46:36,567 INFO L158 Benchmark]: Witness Printer took 80.11ms. Allocated memory is still 192.9MB. Free memory was 84.4MB in the beginning and 80.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-12 15:46:36,568 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 75.5MB. Free memory is still 55.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.42ms. Allocated memory is still 75.5MB. Free memory was 36.7MB in the beginning and 46.6MB in the end (delta: -9.9MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.47ms. Allocated memory is still 75.5MB. Free memory was 46.6MB in the beginning and 45.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.51ms. Allocated memory is still 75.5MB. Free memory was 45.6MB in the beginning and 44.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.75ms. Allocated memory was 75.5MB in the beginning and 109.1MB in the end (delta: 33.6MB). Free memory was 44.0MB in the beginning and 85.5MB in the end (delta: -41.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 12984.07ms. Allocated memory was 109.1MB in the beginning and 192.9MB in the end (delta: 83.9MB). Free memory was 84.6MB in the beginning and 84.4MB in the end (delta: 193.1kB). Peak memory consumption was 115.3MB. Max. memory is 16.1GB. * Witness Printer took 80.11ms. Allocated memory is still 192.9MB. Free memory was 84.4MB in the beginning and 80.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.9s, OverallIterations: 12, TraceHistogramMax: 23, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 1967 SdHoareTripleChecker+Invalid, 1.4s 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, 1.7s 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: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.0s 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: ((((((((((3 * ((__int128) n * n)) + (((__int128) n * n) * n)) + ((__int128) n * 3)) + 1) == (y + x)) && (a <= 20)) && ((((__int128) n * 6) + 6) == z)) && (0 <= a)) && ((((__int128) n * n) * n) == x)) && ((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! [2024-09-12 15:46:36,585 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE