./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i -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 cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:45:08,068 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:45:08,129 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:45:08,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:45:08,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:45:08,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:45:08,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:45:08,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:45:08,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:45:08,171 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:45:08,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:45:08,172 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:45:08,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:45:08,173 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:45:08,174 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:45:08,175 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:45:08,175 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:45:08,175 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:45:08,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:45:08,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:45:08,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:45:08,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:45:08,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:45:08,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:45:08,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:45:08,180 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:45:08,180 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:45:08,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:45:08,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:45:08,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:45:08,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:45:08,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:45:08,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:45:08,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:45:08,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:45:08,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:45:08,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:45:08,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:45:08,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:45:08,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:45:08,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:45:08,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:45:08,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:45:08,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:45:08,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:45:08,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:45:08,509 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:45:08,510 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:45:08,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2024-09-11 19:45:09,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:45:10,075 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:45:10,079 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2024-09-11 19:45:10,088 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/48a91c600/f11601f608c64eea8f25ca50d12f867c/FLAG1d9c85305 [2024-09-11 19:45:10,472 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/48a91c600/f11601f608c64eea8f25ca50d12f867c [2024-09-11 19:45:10,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:45:10,475 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:45:10,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:45:10,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:45:10,482 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:45:10,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,485 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e66cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10, skipping insertion in model container [2024-09-11 19:45:10,485 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,503 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:45:10,640 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/divbin2_unwindbound20.i[951,964] [2024-09-11 19:45:10,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:45:10,663 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:45:10,677 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/divbin2_unwindbound20.i[951,964] [2024-09-11 19:45:10,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:45:10,704 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:45:10,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10 WrapperNode [2024-09-11 19:45:10,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:45:10,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:45:10,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:45:10,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:45:10,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,742 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2024-09-11 19:45:10,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:45:10,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:45:10,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:45:10,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:45:10,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,755 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,768 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-11 19:45:10,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:45:10,777 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:45:10,777 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:45:10,777 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:45:10,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (1/1) ... [2024-09-11 19:45:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:45:10,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:45:10,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 19:45:10,808 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 19:45:10,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:45:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:45:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:45:10,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:45:10,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:45:10,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:45:10,897 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:45:10,899 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:45:11,000 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-11 19:45:11,000 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:45:11,023 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:45:11,023 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 19:45:11,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:45:11 BoogieIcfgContainer [2024-09-11 19:45:11,024 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:45:11,026 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:45:11,026 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:45:11,028 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:45:11,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:45:10" (1/3) ... [2024-09-11 19:45:11,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397d0a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:45:11, skipping insertion in model container [2024-09-11 19:45:11,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:45:10" (2/3) ... [2024-09-11 19:45:11,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397d0a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:45:11, skipping insertion in model container [2024-09-11 19:45:11,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:45:11" (3/3) ... [2024-09-11 19:45:11,033 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.i [2024-09-11 19:45:11,048 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:45:11,049 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:45:11,095 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:45:11,101 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;@5e851b14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:45:11,101 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:45:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 19:45:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-11 19:45:11,111 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:11,112 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:11,112 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:11,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 774102990, now seen corresponding path program 1 times [2024-09-11 19:45:11,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:11,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226533599] [2024-09-11 19:45:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:11,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:11,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226533599] [2024-09-11 19:45:11,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226533599] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:45:11,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:45:11,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:45:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90949924] [2024-09-11 19:45:11,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:45:11,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:45:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:11,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:45:11,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:45:11,278 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:11,304 INFO L93 Difference]: Finished difference Result 32 states and 47 transitions. [2024-09-11 19:45:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:45:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-09-11 19:45:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:11,310 INFO L225 Difference]: With dead ends: 32 [2024-09-11 19:45:11,311 INFO L226 Difference]: Without dead ends: 16 [2024-09-11 19:45:11,312 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:45:11,315 INFO L434 NwaCegarLoop]: 21 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, 21 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:11,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:45:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-11 19:45:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-11 19:45:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:45:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2024-09-11 19:45:11,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 7 [2024-09-11 19:45:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:11,342 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2024-09-11 19:45:11,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2024-09-11 19:45:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 19:45:11,344 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:11,344 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:11,344 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:45:11,345 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:11,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1084410172, now seen corresponding path program 1 times [2024-09-11 19:45:11,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:11,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889209498] [2024-09-11 19:45:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:11,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:11,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889209498] [2024-09-11 19:45:11,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889209498] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:45:11,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:45:11,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:45:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618771492] [2024-09-11 19:45:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:45:11,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:45:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:45:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:45:11,489 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:11,520 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-09-11 19:45:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:45:11,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-11 19:45:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:11,524 INFO L225 Difference]: With dead ends: 30 [2024-09-11 19:45:11,524 INFO L226 Difference]: Without dead ends: 18 [2024-09-11 19:45:11,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:45:11,525 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:11,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:45:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-11 19:45:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-11 19:45:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:45:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-09-11 19:45:11,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2024-09-11 19:45:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:11,536 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-09-11 19:45:11,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-09-11 19:45:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-11 19:45:11,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:11,538 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:11,538 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:45:11,538 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:11,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718015, now seen corresponding path program 1 times [2024-09-11 19:45:11,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:11,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010381350] [2024-09-11 19:45:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:11,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010381350] [2024-09-11 19:45:11,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010381350] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:45:11,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:45:11,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:45:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087701174] [2024-09-11 19:45:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:45:11,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:45:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:45:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:45:11,695 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:11,730 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-09-11 19:45:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:45:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-11 19:45:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:11,732 INFO L225 Difference]: With dead ends: 29 [2024-09-11 19:45:11,733 INFO L226 Difference]: Without dead ends: 22 [2024-09-11 19:45:11,733 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:45:11,735 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:11,738 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:45:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-11 19:45:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-09-11 19:45:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:45:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2024-09-11 19:45:11,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2024-09-11 19:45:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:11,746 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2024-09-11 19:45:11,747 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-09-11 19:45:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-11 19:45:11,748 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:11,748 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:11,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-11 19:45:11,748 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:11,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1066930555, now seen corresponding path program 1 times [2024-09-11 19:45:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:11,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496486928] [2024-09-11 19:45:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:45:11,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176956064] [2024-09-11 19:45:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:11,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:45:11,767 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:45:11,769 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:45:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:11,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:45:11,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:45:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:11,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:45:11,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:11,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496486928] [2024-09-11 19:45:11,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:45:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176956064] [2024-09-11 19:45:11,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176956064] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:45:11,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:45:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-11 19:45:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813542138] [2024-09-11 19:45:11,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:45:11,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:45:11,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:45:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:45:11,921 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:11,973 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2024-09-11 19:45:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:45:11,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-11 19:45:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:11,975 INFO L225 Difference]: With dead ends: 33 [2024-09-11 19:45:11,975 INFO L226 Difference]: Without dead ends: 30 [2024-09-11 19:45:11,976 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:45:11,977 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:11,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:45:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-11 19:45:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-09-11 19:45:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 19:45:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-11 19:45:11,984 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 10 [2024-09-11 19:45:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:11,984 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-11 19:45:11,985 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:45:11,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-11 19:45:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-11 19:45:11,989 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:11,990 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:12,008 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:45:12,194 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:12,195 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:12,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1010218476, now seen corresponding path program 1 times [2024-09-11 19:45:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:12,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762701561] [2024-09-11 19:45:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:12,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:45:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:12,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762701561] [2024-09-11 19:45:12,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762701561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:45:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226609676] [2024-09-11 19:45:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:12,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:12,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:45:12,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:45:12,389 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:45:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:12,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:45:12,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:45:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:12,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:45:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:12,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226609676] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:45:12,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:45:12,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-09-11 19:45:12,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550626873] [2024-09-11 19:45:12,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:45:12,572 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 19:45:12,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:12,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 19:45:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-09-11 19:45:12,576 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 19:45:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:12,731 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2024-09-11 19:45:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 19:45:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-09-11 19:45:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:12,734 INFO L225 Difference]: With dead ends: 124 [2024-09-11 19:45:12,734 INFO L226 Difference]: Without dead ends: 117 [2024-09-11 19:45:12,735 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:45:12,736 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:12,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 116 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:45:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-11 19:45:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2024-09-11 19:45:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.329268292682927) internal successors, (109), 86 states have internal predecessors, (109), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 19:45:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2024-09-11 19:45:12,775 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 19 [2024-09-11 19:45:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:12,775 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2024-09-11 19:45:12,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 19:45:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2024-09-11 19:45:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-11 19:45:12,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:12,779 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:12,801 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 19:45:12,979 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:12,980 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:12,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1008431016, now seen corresponding path program 1 times [2024-09-11 19:45:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:12,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741997189] [2024-09-11 19:45:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:12,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:13,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 19:45:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:45:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:13,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741997189] [2024-09-11 19:45:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741997189] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:45:13,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:45:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:45:13,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149522860] [2024-09-11 19:45:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:45:13,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 19:45:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 19:45:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:45:13,193 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:45:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:13,226 INFO L93 Difference]: Finished difference Result 175 states and 214 transitions. [2024-09-11 19:45:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:45:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-11 19:45:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:13,229 INFO L225 Difference]: With dead ends: 175 [2024-09-11 19:45:13,231 INFO L226 Difference]: Without dead ends: 86 [2024-09-11 19:45:13,231 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:45:13,232 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:13,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:45:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-11 19:45:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-09-11 19:45:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 71 states have internal predecessors, (90), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 19:45:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2024-09-11 19:45:13,258 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 19 [2024-09-11 19:45:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:13,258 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2024-09-11 19:45:13,259 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:45:13,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2024-09-11 19:45:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 19:45:13,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:13,261 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:13,261 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-11 19:45:13,261 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:13,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1211901843, now seen corresponding path program 1 times [2024-09-11 19:45:13,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:13,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186185426] [2024-09-11 19:45:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:13,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:13,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 19:45:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:45:13,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186185426] [2024-09-11 19:45:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186185426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:45:13,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858618665] [2024-09-11 19:45:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:45:13,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:45:13,352 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:45:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:13,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-11 19:45:13,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:45:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 19:45:13,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:45:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:45:13,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858618665] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:45:13,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:45:13,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-09-11 19:45:13,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213797535] [2024-09-11 19:45:13,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:45:13,471 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:45:13,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:45:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:45:13,473 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:45:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:13,543 INFO L93 Difference]: Finished difference Result 156 states and 190 transitions. [2024-09-11 19:45:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:45:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-09-11 19:45:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:13,547 INFO L225 Difference]: With dead ends: 156 [2024-09-11 19:45:13,548 INFO L226 Difference]: Without dead ends: 86 [2024-09-11 19:45:13,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-09-11 19:45:13,549 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:13,549 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:45:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-11 19:45:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-09-11 19:45:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 71 states have internal predecessors, (87), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-11 19:45:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2024-09-11 19:45:13,567 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 21 [2024-09-11 19:45:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:13,569 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2024-09-11 19:45:13,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 19:45:13,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2024-09-11 19:45:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:45:13,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:13,570 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:45:13,585 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 19:45:13,770 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 19:45:13,771 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:13,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:13,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1424589502, now seen corresponding path program 1 times [2024-09-11 19:45:13,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:13,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006495304] [2024-09-11 19:45:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:45:13,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061804200] [2024-09-11 19:45:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:13,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:45:13,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:45:13,814 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:45:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:13,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-11 19:45:13,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:45:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:45:14,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:45:29,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006495304] [2024-09-11 19:45:29,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:45:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061804200] [2024-09-11 19:45:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061804200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:45:29,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:45:29,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-11 19:45:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565788478] [2024-09-11 19:45:29,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:45:29,609 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:45:29,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:29,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:45:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=145, Unknown=3, NotChecked=0, Total=182 [2024-09-11 19:45:29,610 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:45:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:29,728 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2024-09-11 19:45:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 19:45:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-11 19:45:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:29,730 INFO L225 Difference]: With dead ends: 108 [2024-09-11 19:45:29,730 INFO L226 Difference]: Without dead ends: 103 [2024-09-11 19:45:29,730 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210 [2024-09-11 19:45:29,732 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:29,732 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:45:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-11 19:45:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2024-09-11 19:45:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 74 states have internal predecessors, (87), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 19:45:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2024-09-11 19:45:29,747 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 22 [2024-09-11 19:45:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:29,748 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2024-09-11 19:45:29,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:45:29,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2024-09-11 19:45:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-11 19:45:29,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:29,751 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-11 19:45:29,757 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:45:29,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:29,954 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:29,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash 334382651, now seen corresponding path program 2 times [2024-09-11 19:45:29,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:29,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071926712] [2024-09-11 19:45:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:29,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:30,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-11 19:45:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:30,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-11 19:45:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:45:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:45:30,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:45:30,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071926712] [2024-09-11 19:45:30,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071926712] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:45:30,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314042168] [2024-09-11 19:45:30,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:45:30,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:30,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:45:30,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:45:30,376 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:45:30,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:45:30,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:45:30,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:45:30,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:45:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:45:30,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:45:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:45:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314042168] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:45:30,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:45:30,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2024-09-11 19:45:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279519092] [2024-09-11 19:45:30,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:45:30,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:45:30,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:45:30,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:45:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:45:30,883 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:45:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:45:30,997 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2024-09-11 19:45:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:45:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 31 [2024-09-11 19:45:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:45:30,998 INFO L225 Difference]: With dead ends: 151 [2024-09-11 19:45:30,998 INFO L226 Difference]: Without dead ends: 75 [2024-09-11 19:45:30,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:45:30,999 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:45:31,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 155 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:45:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-11 19:45:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2024-09-11 19:45:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 53 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 19:45:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2024-09-11 19:45:31,022 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 31 [2024-09-11 19:45:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:45:31,023 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2024-09-11 19:45:31,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:45:31,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2024-09-11 19:45:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-11 19:45:31,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:45:31,025 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-11 19:45:31,043 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:45:31,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:31,226 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:45:31,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:45:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2023611355, now seen corresponding path program 3 times [2024-09-11 19:45:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:45:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005157377] [2024-09-11 19:45:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:45:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:45:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:45:31,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229620682] [2024-09-11 19:45:31,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:45:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:45:31,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:45:31,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:45:31,288 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:47:09,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:47:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:47:09,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 19:47:09,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:47:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 19:47:10,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:47:52,402 WARN L293 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:48:04,418 WARN L293 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:48:16,439 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:48:40,547 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:48:56,717 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:49:08,741 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:49:16,762 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:49:32,809 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)