./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 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/prodbin-ll_valuebound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 --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-1d5fa63-m [2024-09-13 09:40:41,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:40:42,039 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:40:42,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:40:42,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:40:42,065 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:40:42,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:40:42,066 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:40:42,066 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:40:42,067 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:40:42,067 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:40:42,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:40:42,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:40:42,068 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:40:42,068 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:40:42,069 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:40:42,069 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:40:42,069 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:40:42,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:40:42,070 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:40:42,070 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:40:42,070 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:40:42,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:40:42,071 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:40:42,071 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:40:42,071 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:40:42,071 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:40:42,072 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:40:42,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:40:42,072 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:40:42,072 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:40:42,072 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:40:42,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:40:42,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:40:42,073 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:40:42,073 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:40:42,073 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:40:42,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:40:42,074 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:40:42,074 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:40:42,074 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:40:42,075 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:40:42,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:40:42,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:40:42,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:40:42,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:40:42,265 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:40:42,265 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:40:42,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2024-09-13 09:40:43,561 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:40:43,761 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:40:43,762 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2024-09-13 09:40:43,771 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c1bdc8be9/6ec8019dbdf54694b3c5551e7d302fc4/FLAGa18ccedd0 [2024-09-13 09:40:44,138 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c1bdc8be9/6ec8019dbdf54694b3c5551e7d302fc4 [2024-09-13 09:40:44,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:40:44,142 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:40:44,142 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:40:44,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:40:44,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:40:44,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bd72c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44, skipping insertion in model container [2024-09-13 09:40:44,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,166 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:40:44,278 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/prodbin-ll_valuebound100.c[537,550] [2024-09-13 09:40:44,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:40:44,300 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:40:44,310 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/prodbin-ll_valuebound100.c[537,550] [2024-09-13 09:40:44,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:40:44,329 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:40:44,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44 WrapperNode [2024-09-13 09:40:44,330 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:40:44,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:40:44,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:40:44,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:40:44,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,343 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,349 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:40:44,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:40:44,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:40:44,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:40:44,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:40:44,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,371 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]. [2024-09-13 09:40:44,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,374 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,376 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:40:44,382 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:40:44,382 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:40:44,382 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:40:44,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (1/1) ... [2024-09-13 09:40:44,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:40:44,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:40:44,416 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) [2024-09-13 09:40:44,422 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 [2024-09-13 09:40:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:40:44,489 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 09:40:44,489 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 09:40:44,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:40:44,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:40:44,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:40:44,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:40:44,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:40:44,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:40:44,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:40:44,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:40:44,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:40:44,539 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:40:44,540 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:40:44,647 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-13 09:40:44,648 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:40:44,677 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:40:44,677 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-13 09:40:44,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:40:44 BoogieIcfgContainer [2024-09-13 09:40:44,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:40:44,679 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:40:44,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:40:44,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:40:44,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:40:44" (1/3) ... [2024-09-13 09:40:44,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4843f455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:40:44, skipping insertion in model container [2024-09-13 09:40:44,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:40:44" (2/3) ... [2024-09-13 09:40:44,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4843f455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:40:44, skipping insertion in model container [2024-09-13 09:40:44,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:40:44" (3/3) ... [2024-09-13 09:40:44,697 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2024-09-13 09:40:44,729 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:40:44,730 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:40:44,789 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:40:44,794 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;@442a0a89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:40:44,794 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:40:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 09:40:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-13 09:40:44,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:40:44,807 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:40:44,811 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:40:44,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-13 09:40:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:40:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190060116] [2024-09-13 09:40:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:40:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:44,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:40:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:44,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:40:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:44,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:40:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:44,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:40:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:40:44,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:40:44,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190060116] [2024-09-13 09:40:44,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190060116] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:40:44,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:40:44,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 09:40:44,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433583039] [2024-09-13 09:40:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:40:44,983 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 09:40:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:40:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 09:40:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:40:45,001 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:40:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:40:45,029 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-13 09:40:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 09:40:45,030 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-13 09:40:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:40:45,035 INFO L225 Difference]: With dead ends: 54 [2024-09-13 09:40:45,036 INFO L226 Difference]: Without dead ends: 26 [2024-09-13 09:40:45,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:40:45,041 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:40:45,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:40:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-13 09:40:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-13 09:40:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 09:40:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-13 09:40:45,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-13 09:40:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:40:45,072 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-13 09:40:45,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:40:45,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-13 09:40:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-13 09:40:45,075 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:40:45,075 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:40:45,076 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:40:45,076 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:40:45,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-13 09:40:45,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:40:45,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725485276] [2024-09-13 09:40:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:40:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:40:45,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782370773] [2024-09-13 09:40:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:45,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:40:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:40:45,114 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) [2024-09-13 09:40:45,132 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:40:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:45,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 09:40:45,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:40:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:40:45,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:40:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:40:45,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:40:45,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725485276] [2024-09-13 09:40:45,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:40:45,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782370773] [2024-09-13 09:40:45,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782370773] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:40:45,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:40:45,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-13 09:40:45,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176715216] [2024-09-13 09:40:45,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:40:45,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:40:45,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:40:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:40:45,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:40:45,501 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-13 09:40:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:40:45,587 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-13 09:40:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:40:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-13 09:40:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:40:45,588 INFO L225 Difference]: With dead ends: 37 [2024-09-13 09:40:45,588 INFO L226 Difference]: Without dead ends: 35 [2024-09-13 09:40:45,588 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:40:45,589 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 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 [2024-09-13 09:40:45,591 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:40:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-13 09:40:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-13 09:40:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 09:40:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-13 09:40:45,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-13 09:40:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:40:45,601 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-13 09:40:45,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-13 09:40:45,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-13 09:40:45,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 09:40:45,604 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:40:45,604 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:40:45,621 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 09:40:45,804 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:40:45,805 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:40:45,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-13 09:40:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:40:45,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421003179] [2024-09-13 09:40:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:40:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:45,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:40:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:45,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:40:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:45,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:40:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:45,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:40:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:45,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 09:40:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:40:45,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:40:45,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421003179] [2024-09-13 09:40:45,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421003179] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:40:45,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:40:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 09:40:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194220603] [2024-09-13 09:40:45,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:40:45,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 09:40:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:40:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 09:40:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:40:45,969 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:40:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:40:46,028 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-13 09:40:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:40:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-13 09:40:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:40:46,029 INFO L225 Difference]: With dead ends: 42 [2024-09-13 09:40:46,029 INFO L226 Difference]: Without dead ends: 35 [2024-09-13 09:40:46,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:40:46,030 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:40:46,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:40:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-13 09:40:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-13 09:40:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 09:40:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-13 09:40:46,040 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-13 09:40:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:40:46,040 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-13 09:40:46,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:40:46,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-13 09:40:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 09:40:46,041 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:40:46,041 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:40:46,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 09:40:46,042 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:40:46,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:46,042 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-13 09:40:46,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:40:46,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128178231] [2024-09-13 09:40:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:46,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:40:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:40:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677624424] [2024-09-13 09:40:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:46,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:40:46,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:40:46,087 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) [2024-09-13 09:40:46,088 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:40:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:46,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 09:40:46,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:40:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:40:46,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:40:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:40:47,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:40:47,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128178231] [2024-09-13 09:40:47,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:40:47,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677624424] [2024-09-13 09:40:47,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677624424] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:40:47,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:40:47,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-13 09:40:47,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292796066] [2024-09-13 09:40:47,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:40:47,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 09:40:47,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:40:47,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 09:40:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:40:47,567 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 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) [2024-09-13 09:40:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:40:47,813 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-13 09:40:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:40:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 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 36 [2024-09-13 09:40:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:40:47,819 INFO L225 Difference]: With dead ends: 45 [2024-09-13 09:40:47,819 INFO L226 Difference]: Without dead ends: 43 [2024-09-13 09:40:47,819 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:40:47,820 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:40:47,820 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:40:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-13 09:40:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-13 09:40:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 09:40:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-13 09:40:47,830 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-13 09:40:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:40:47,831 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-13 09:40:47,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 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) [2024-09-13 09:40:47,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-13 09:40:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 09:40:47,832 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:40:47,832 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:40:47,844 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 09:40:48,035 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 [2024-09-13 09:40:48,035 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:40:48,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-13 09:40:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:40:48,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562690573] [2024-09-13 09:40:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:48,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:40:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:40:48,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005677866] [2024-09-13 09:40:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:48,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:40:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:40:48,059 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) [2024-09-13 09:40:48,061 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:40:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:48,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 09:40:48,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:40:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:40:48,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:40:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:40:48,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:40:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562690573] [2024-09-13 09:40:48,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:40:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005677866] [2024-09-13 09:40:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005677866] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:40:48,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:40:48,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-13 09:40:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58652376] [2024-09-13 09:40:48,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:40:48,710 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 09:40:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:40:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 09:40:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-13 09:40:48,710 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-13 09:40:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:40:49,257 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-13 09:40:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 09:40:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2024-09-13 09:40:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:40:49,260 INFO L225 Difference]: With dead ends: 67 [2024-09-13 09:40:49,260 INFO L226 Difference]: Without dead ends: 60 [2024-09-13 09:40:49,261 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-13 09:40:49,261 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:40:49,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:40:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-13 09:40:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-13 09:40:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 09:40:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-13 09:40:49,273 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-13 09:40:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:40:49,273 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-13 09:40:49,273 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-13 09:40:49,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-13 09:40:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 09:40:49,274 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:40:49,274 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2024-09-13 09:40:49,289 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 09:40:49,478 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 [2024-09-13 09:40:49,479 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:40:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-13 09:40:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:40:49,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182946495] [2024-09-13 09:40:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:40:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:40:49,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323253041] [2024-09-13 09:40:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:49,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:40:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:40:49,502 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) [2024-09-13 09:40:49,508 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:40:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:49,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 09:40:49,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:40:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:40:49,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:40:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:40:49,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:40:49,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182946495] [2024-09-13 09:40:49,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:40:49,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323253041] [2024-09-13 09:40:49,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323253041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:40:49,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:40:49,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-13 09:40:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192513462] [2024-09-13 09:40:49,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:40:49,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 09:40:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:40:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 09:40:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:40:49,654 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 09:40:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:40:49,793 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-13 09:40:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:40:49,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 42 [2024-09-13 09:40:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:40:49,797 INFO L225 Difference]: With dead ends: 67 [2024-09-13 09:40:49,797 INFO L226 Difference]: Without dead ends: 60 [2024-09-13 09:40:49,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:40:49,798 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:40:49,799 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:40:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-13 09:40:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-13 09:40:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 09:40:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-13 09:40:49,814 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-13 09:40:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:40:49,814 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-13 09:40:49,814 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 09:40:49,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-13 09:40:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 09:40:49,815 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:40:49,815 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:40:49,832 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:40:50,016 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 [2024-09-13 09:40:50,016 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:40:50,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:40:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-13 09:40:50,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:40:50,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815659838] [2024-09-13 09:40:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:50,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:40:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:40:50,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19755428] [2024-09-13 09:40:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:40:50,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:40:50,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:40:50,054 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) [2024-09-13 09:40:50,055 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:40:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:40:50,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 09:40:50,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:40:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 09:40:50,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:40:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 09:40:58,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:40:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815659838] [2024-09-13 09:40:58,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:40:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19755428] [2024-09-13 09:40:58,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19755428] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:40:58,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:40:58,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2024-09-13 09:40:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455436316] [2024-09-13 09:40:58,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:40:58,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 09:40:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:40:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 09:40:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-13 09:40:58,008 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 09:41:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:41:05,038 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2024-09-13 09:41:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 09:41:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2024-09-13 09:41:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:41:05,040 INFO L225 Difference]: With dead ends: 93 [2024-09-13 09:41:05,040 INFO L226 Difference]: Without dead ends: 91 [2024-09-13 09:41:05,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-09-13 09:41:05,041 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:41:05,041 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 253 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-13 09:41:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-13 09:41:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2024-09-13 09:41:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-13 09:41:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2024-09-13 09:41:05,064 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 45 [2024-09-13 09:41:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:41:05,064 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2024-09-13 09:41:05,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 09:41:05,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2024-09-13 09:41:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 09:41:05,066 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:41:05,066 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:41:05,080 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 09:41:05,270 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 [2024-09-13 09:41:05,271 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:41:05,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 992859484, now seen corresponding path program 2 times [2024-09-13 09:41:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:41:05,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994385325] [2024-09-13 09:41:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:41:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:41:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:41:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028571415] [2024-09-13 09:41:05,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:41:05,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:41:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:41:05,294 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) [2024-09-13 09:41:05,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:41:05,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:41:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:41:05,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 09:41:05,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:41:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:41:05,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:41:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 09:41:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:41:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994385325] [2024-09-13 09:41:07,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:41:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028571415] [2024-09-13 09:41:07,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028571415] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:41:07,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:41:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2024-09-13 09:41:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26758147] [2024-09-13 09:41:07,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:41:07,404 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 09:41:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:41:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 09:41:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:41:07,405 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-13 09:41:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:41:10,742 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2024-09-13 09:41:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 09:41:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2024-09-13 09:41:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:41:10,744 INFO L225 Difference]: With dead ends: 128 [2024-09-13 09:41:10,744 INFO L226 Difference]: Without dead ends: 126 [2024-09-13 09:41:10,745 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2024-09-13 09:41:10,745 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:41:10,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 229 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 09:41:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-13 09:41:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-09-13 09:41:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 96 states have internal predecessors, (108), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 09:41:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2024-09-13 09:41:10,780 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 54 [2024-09-13 09:41:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:41:10,780 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2024-09-13 09:41:10,781 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-13 09:41:10,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2024-09-13 09:41:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 09:41:10,784 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:41:10,784 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:41:10,796 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 09:41:10,986 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 [2024-09-13 09:41:10,986 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:41:10,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 3 times [2024-09-13 09:41:10,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:41:10,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917833330] [2024-09-13 09:41:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:41:10,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:41:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:41:11,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345367834] [2024-09-13 09:41:11,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:41:11,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:41:11,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:41:11,032 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) [2024-09-13 09:41:11,035 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:41:11,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:41:11,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:41:11,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 09:41:11,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:41:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-13 09:41:12,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:41:12,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:41:12,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917833330] [2024-09-13 09:41:12,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:41:12,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345367834] [2024-09-13 09:41:12,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345367834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:41:12,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:41:12,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-13 09:41:12,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615320363] [2024-09-13 09:41:12,271 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:41:12,271 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 09:41:12,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:41:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 09:41:12,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:41:12,272 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:41:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:41:13,851 INFO L93 Difference]: Finished difference Result 166 states and 194 transitions. [2024-09-13 09:41:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 09:41:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2024-09-13 09:41:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:41:13,853 INFO L225 Difference]: With dead ends: 166 [2024-09-13 09:41:13,853 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 09:41:13,853 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:41:13,854 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:41:13,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 214 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:41:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 09:41:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-13 09:41:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 09:41:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-09-13 09:41:13,865 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 63 [2024-09-13 09:41:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:41:13,865 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-09-13 09:41:13,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:41:13,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-09-13 09:41:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-13 09:41:13,866 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:41:13,866 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:41:13,879 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 09:41:14,070 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 [2024-09-13 09:41:14,071 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:41:14,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1255090726, now seen corresponding path program 2 times [2024-09-13 09:41:14,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:41:14,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596161708] [2024-09-13 09:41:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:41:14,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:41:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:41:14,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128528319] [2024-09-13 09:41:14,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:41:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:41:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:41:14,126 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) [2024-09-13 09:41:14,127 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:41:14,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:41:14,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:41:14,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 09:41:14,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:41:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 23 proven. 71 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:41:16,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:41:41,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:41:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596161708] [2024-09-13 09:41:41,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:41:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128528319] [2024-09-13 09:41:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128528319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:41:41,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:41:41,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-13 09:41:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143133141] [2024-09-13 09:41:41,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:41:41,653 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 09:41:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:41:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 09:41:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=801, Unknown=1, NotChecked=0, Total=992 [2024-09-13 09:41:41,655 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 09:41:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:41:42,473 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2024-09-13 09:41:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 09:41:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 72 [2024-09-13 09:41:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:41:42,479 INFO L225 Difference]: With dead ends: 77 [2024-09-13 09:41:42,481 INFO L226 Difference]: Without dead ends: 75 [2024-09-13 09:41:42,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=197, Invalid=858, Unknown=1, NotChecked=0, Total=1056 [2024-09-13 09:41:42,483 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:41:42,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 391 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 09:41:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-13 09:41:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-09-13 09:41:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 09:41:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2024-09-13 09:41:42,511 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 72 [2024-09-13 09:41:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:41:42,511 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2024-09-13 09:41:42,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 09:41:42,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2024-09-13 09:41:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-13 09:41:42,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:41:42,513 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:41:42,525 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 09:41:42,716 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 [2024-09-13 09:41:42,717 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:41:42,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:41:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1793279440, now seen corresponding path program 3 times [2024-09-13 09:41:42,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:41:42,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19790962] [2024-09-13 09:41:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:41:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:41:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:41:42,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364311103] [2024-09-13 09:41:42,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:41:42,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:41:42,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:41:42,790 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) [2024-09-13 09:41:42,791 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:41:42,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 09:41:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:41:42,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 09:41:42,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:41:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 29 proven. 91 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 09:41:45,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:42:21,464 WARN L293 SmtUtils]: Spent 9.56s on a formula simplification. DAG size of input: 344 DAG size of output: 342 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:43:37,245 WARN L293 SmtUtils]: Spent 43.38s on a formula simplification. DAG size of input: 674 DAG size of output: 672 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)