./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 23:20:43,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 23:20:43,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 23:20:43,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 23:20:43,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 23:20:43,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 23:20:43,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 23:20:43,975 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 23:20:43,976 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 23:20:43,977 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 23:20:43,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 23:20:43,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 23:20:43,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 23:20:43,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 23:20:43,982 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 23:20:43,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 23:20:43,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 23:20:43,983 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 23:20:43,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 23:20:43,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 23:20:43,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 23:20:43,984 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 23:20:43,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 23:20:43,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 23:20:43,984 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 23:20:43,985 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 23:20:43,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 23:20:43,985 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 23:20:43,985 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 23:20:43,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 23:20:43,986 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 23:20:43,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 23:20:43,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:20:43,988 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 23:20:43,988 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 23:20:43,988 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 23:20:43,988 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 23:20:43,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 23:20:43,989 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 23:20:43,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 23:20:43,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 23:20:43,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 23:20:43,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 23:20:44,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 23:20:44,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 23:20:44,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 23:20:44,219 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 23:20:44,220 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 23:20:44,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard2.c [2024-09-12 23:20:45,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 23:20:45,721 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 23:20:45,722 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard2.c [2024-09-12 23:20:45,728 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b60deac88/fa13a32af38d4a20a3dd523d6358a681/FLAG0aa56e53b [2024-09-12 23:20:46,138 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b60deac88/fa13a32af38d4a20a3dd523d6358a681 [2024-09-12 23:20:46,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 23:20:46,142 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 23:20:46,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 23:20:46,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 23:20:46,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 23:20:46,149 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb74843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46, skipping insertion in model container [2024-09-12 23:20:46,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,166 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 23:20:46,290 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/hard2.c[526,539] [2024-09-12 23:20:46,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:20:46,315 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 23:20:46,327 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/hard2.c[526,539] [2024-09-12 23:20:46,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 23:20:46,348 INFO L204 MainTranslator]: Completed translation [2024-09-12 23:20:46,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46 WrapperNode [2024-09-12 23:20:46,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 23:20:46,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 23:20:46,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 23:20:46,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 23:20:46,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,365 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,372 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 23:20:46,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 23:20:46,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 23:20:46,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 23:20:46,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 23:20:46,382 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,384 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,395 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-12 23:20:46,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,406 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 23:20:46,416 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 23:20:46,416 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 23:20:46,417 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 23:20:46,417 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (1/1) ... [2024-09-12 23:20:46,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 23:20:46,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:46,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 23:20:46,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 23:20:46,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 23:20:46,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 23:20:46,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 23:20:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 23:20:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 23:20:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 23:20:46,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 23:20:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 23:20:46,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 23:20:46,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 23:20:46,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 23:20:46,565 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 23:20:46,568 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 23:20:46,738 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 23:20:46,739 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 23:20:46,773 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 23:20:46,773 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 23:20:46,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:20:46 BoogieIcfgContainer [2024-09-12 23:20:46,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 23:20:46,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 23:20:46,777 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 23:20:46,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 23:20:46,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 11:20:46" (1/3) ... [2024-09-12 23:20:46,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5b3454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:20:46, skipping insertion in model container [2024-09-12 23:20:46,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 11:20:46" (2/3) ... [2024-09-12 23:20:46,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5b3454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 11:20:46, skipping insertion in model container [2024-09-12 23:20:46,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:20:46" (3/3) ... [2024-09-12 23:20:46,782 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2024-09-12 23:20:46,796 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 23:20:46,796 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 23:20:46,851 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 23:20:46,858 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;@2a0a768, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 23:20:46,859 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 23:20:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 23:20:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 23:20:46,871 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:46,871 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:46,872 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:46,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1467428880, now seen corresponding path program 1 times [2024-09-12 23:20:46,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:46,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689943633] [2024-09-12 23:20:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:46,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:47,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:20:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:20:47,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:47,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689943633] [2024-09-12 23:20:47,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689943633] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:20:47,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:20:47,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:20:47,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152485256] [2024-09-12 23:20:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:20:47,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:20:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:47,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:20:47,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:20:47,161 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 23:20:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:47,245 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-09-12 23:20:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:20:47,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 23:20:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:47,256 INFO L225 Difference]: With dead ends: 62 [2024-09-12 23:20:47,256 INFO L226 Difference]: Without dead ends: 34 [2024-09-12 23:20:47,259 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:20:47,261 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:47,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:20:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-12 23:20:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-09-12 23:20:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 23:20:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-09-12 23:20:47,306 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-09-12 23:20:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:47,307 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-09-12 23:20:47,308 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 23:20:47,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-09-12 23:20:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 23:20:47,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:47,310 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:47,310 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 23:20:47,310 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:47,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash -740867385, now seen corresponding path program 1 times [2024-09-12 23:20:47,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:47,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582174213] [2024-09-12 23:20:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:47,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:47,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:20:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:47,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 23:20:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 23:20:47,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:47,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582174213] [2024-09-12 23:20:47,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582174213] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:20:47,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:20:47,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:20:47,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635820439] [2024-09-12 23:20:47,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:20:47,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:20:47,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:20:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:20:47,449 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 23:20:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:47,506 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2024-09-12 23:20:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:20:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-09-12 23:20:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:47,509 INFO L225 Difference]: With dead ends: 40 [2024-09-12 23:20:47,509 INFO L226 Difference]: Without dead ends: 38 [2024-09-12 23:20:47,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:20:47,513 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:47,513 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 88 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:20:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-12 23:20:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2024-09-12 23:20:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 23:20:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-12 23:20:47,525 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2024-09-12 23:20:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:47,525 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-12 23:20:47,526 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 23:20:47,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-12 23:20:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 23:20:47,527 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:47,527 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:47,527 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 23:20:47,528 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:47,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 51798576, now seen corresponding path program 1 times [2024-09-12 23:20:47,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:47,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459712879] [2024-09-12 23:20:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:47,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:20:47,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64651770] [2024-09-12 23:20:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:47,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:47,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:20:47,562 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 23:20:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:47,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 23:20:47,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:20:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 23:20:47,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:20:47,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:47,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459712879] [2024-09-12 23:20:47,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:20:47,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64651770] [2024-09-12 23:20:47,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64651770] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:20:47,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:20:47,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:20:47,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849096595] [2024-09-12 23:20:47,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:20:47,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:20:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:20:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:20:47,769 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 23:20:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:47,850 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-09-12 23:20:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:20:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-09-12 23:20:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:47,852 INFO L225 Difference]: With dead ends: 57 [2024-09-12 23:20:47,852 INFO L226 Difference]: Without dead ends: 44 [2024-09-12 23:20:47,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:20:47,854 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:47,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:20:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-12 23:20:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-12 23:20:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 23:20:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-09-12 23:20:47,865 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 20 [2024-09-12 23:20:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:47,865 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-09-12 23:20:47,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 23:20:47,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-09-12 23:20:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 23:20:47,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:47,867 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:47,885 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 23:20:48,068 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:48,068 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:48,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2131897932, now seen corresponding path program 1 times [2024-09-12 23:20:48,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:48,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491087661] [2024-09-12 23:20:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:48,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:20:48,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997606225] [2024-09-12 23:20:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:48,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:48,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:48,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:20:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 23:20:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:48,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:20:48,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:20:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 23:20:48,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 23:20:48,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:48,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491087661] [2024-09-12 23:20:48,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:20:48,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997606225] [2024-09-12 23:20:48,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997606225] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:20:48,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:20:48,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:20:48,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665012485] [2024-09-12 23:20:48,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:20:48,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:20:48,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:20:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:20:48,212 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 23:20:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:48,283 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-09-12 23:20:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:20:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-12 23:20:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:48,285 INFO L225 Difference]: With dead ends: 57 [2024-09-12 23:20:48,285 INFO L226 Difference]: Without dead ends: 55 [2024-09-12 23:20:48,286 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:20:48,286 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:48,287 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:20:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-12 23:20:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-09-12 23:20:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 23:20:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-09-12 23:20:48,308 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 27 [2024-09-12 23:20:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:48,308 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-09-12 23:20:48,308 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 23:20:48,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-09-12 23:20:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 23:20:48,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:48,310 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:48,326 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 23:20:48,510 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:48,511 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:48,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:48,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1419929093, now seen corresponding path program 1 times [2024-09-12 23:20:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:48,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178187475] [2024-09-12 23:20:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:20:48,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008976732] [2024-09-12 23:20:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:48,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:48,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:48,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:20:48,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 23:20:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:48,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 23:20:48,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:20:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 23:20:48,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:20:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 23:20:48,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:48,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178187475] [2024-09-12 23:20:48,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:20:48,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008976732] [2024-09-12 23:20:48,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008976732] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 23:20:48,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:20:48,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-12 23:20:48,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244742254] [2024-09-12 23:20:48,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:20:48,827 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:20:48,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:20:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 23:20:48,827 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 23:20:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:48,909 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2024-09-12 23:20:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:20:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-12 23:20:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:48,915 INFO L225 Difference]: With dead ends: 64 [2024-09-12 23:20:48,915 INFO L226 Difference]: Without dead ends: 62 [2024-09-12 23:20:48,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 23:20:48,916 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:48,919 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 83 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:20:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-12 23:20:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-09-12 23:20:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 23:20:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-09-12 23:20:48,946 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 37 [2024-09-12 23:20:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:48,946 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-09-12 23:20:48,946 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 23:20:48,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-09-12 23:20:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 23:20:48,948 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:48,948 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:48,960 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 23:20:49,151 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:49,152 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:49,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1229363181, now seen corresponding path program 1 times [2024-09-12 23:20:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:49,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283935809] [2024-09-12 23:20:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:49,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:20:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 23:20:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 23:20:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:20:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 23:20:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 23:20:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 23:20:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 23:20:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283935809] [2024-09-12 23:20:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283935809] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 23:20:49,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 23:20:49,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 23:20:49,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286946011] [2024-09-12 23:20:49,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 23:20:49,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 23:20:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 23:20:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 23:20:49,354 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 23:20:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:49,428 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-09-12 23:20:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 23:20:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2024-09-12 23:20:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:49,430 INFO L225 Difference]: With dead ends: 69 [2024-09-12 23:20:49,430 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 23:20:49,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 23:20:49,431 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:49,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 23:20:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 23:20:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-12 23:20:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 23:20:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-09-12 23:20:49,444 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 43 [2024-09-12 23:20:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:49,444 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-09-12 23:20:49,444 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 23:20:49,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-09-12 23:20:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 23:20:49,446 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:49,446 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:49,446 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-12 23:20:49,446 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:49,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2039536139, now seen corresponding path program 1 times [2024-09-12 23:20:49,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:49,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982244819] [2024-09-12 23:20:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:49,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:20:49,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214648485] [2024-09-12 23:20:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:49,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:49,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:20:49,500 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 23:20:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:49,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 23:20:49,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:20:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-12 23:20:49,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:20:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-12 23:20:51,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:51,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982244819] [2024-09-12 23:20:51,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:20:51,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214648485] [2024-09-12 23:20:51,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214648485] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:20:51,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:20:51,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-09-12 23:20:51,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679817601] [2024-09-12 23:20:51,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:20:51,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 23:20:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:51,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 23:20:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-12 23:20:51,361 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-12 23:20:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:52,072 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2024-09-12 23:20:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 23:20:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 57 [2024-09-12 23:20:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:52,074 INFO L225 Difference]: With dead ends: 132 [2024-09-12 23:20:52,074 INFO L226 Difference]: Without dead ends: 109 [2024-09-12 23:20:52,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-12 23:20:52,075 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:52,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 222 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 23:20:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-12 23:20:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-09-12 23:20:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 27 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-12 23:20:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2024-09-12 23:20:52,115 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 57 [2024-09-12 23:20:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:52,116 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2024-09-12 23:20:52,116 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-12 23:20:52,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2024-09-12 23:20:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 23:20:52,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:52,118 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:52,134 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 23:20:52,322 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:52,323 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:52,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:52,324 INFO L85 PathProgramCache]: Analyzing trace with hash 620479267, now seen corresponding path program 1 times [2024-09-12 23:20:52,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:52,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024122825] [2024-09-12 23:20:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:52,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:20:52,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816375996] [2024-09-12 23:20:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:52,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:52,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:52,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:20:52,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 23:20:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:52,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 23:20:52,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:20:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-12 23:20:52,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:20:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-12 23:20:53,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:53,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024122825] [2024-09-12 23:20:53,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:20:53,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816375996] [2024-09-12 23:20:53,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816375996] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:20:53,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:20:53,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-12 23:20:53,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219325598] [2024-09-12 23:20:53,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:20:53,152 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 23:20:53,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 23:20:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-12 23:20:53,153 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-12 23:20:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:53,713 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2024-09-12 23:20:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 23:20:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 68 [2024-09-12 23:20:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:53,716 INFO L225 Difference]: With dead ends: 162 [2024-09-12 23:20:53,716 INFO L226 Difference]: Without dead ends: 130 [2024-09-12 23:20:53,717 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-09-12 23:20:53,717 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:53,718 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 199 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 23:20:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-12 23:20:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2024-09-12 23:20:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.180327868852459) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 23:20:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2024-09-12 23:20:53,755 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 68 [2024-09-12 23:20:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:53,756 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2024-09-12 23:20:53,756 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-12 23:20:53,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2024-09-12 23:20:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-12 23:20:53,759 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:53,759 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:53,778 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 23:20:53,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 23:20:53,960 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:53,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash -768337324, now seen corresponding path program 1 times [2024-09-12 23:20:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:53,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893048512] [2024-09-12 23:20:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:53,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:20:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 23:20:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 23:20:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:20:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 23:20:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 23:20:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 23:20:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 23:20:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 23:20:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 23:20:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 23:20:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 23:20:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 23:20:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:20:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893048512] [2024-09-12 23:20:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893048512] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:20:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472999756] [2024-09-12 23:20:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:54,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:54,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:20:54,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 23:20:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:20:54,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 23:20:54,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:20:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 23:20:54,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:20:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 23:20:55,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472999756] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:20:55,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:20:55,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-09-12 23:20:55,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534201203] [2024-09-12 23:20:55,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:20:55,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 23:20:55,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:20:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 23:20:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-12 23:20:55,024 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2024-09-12 23:20:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:20:55,262 INFO L93 Difference]: Finished difference Result 143 states and 168 transitions. [2024-09-12 23:20:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 23:20:55,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 73 [2024-09-12 23:20:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:20:55,265 INFO L225 Difference]: With dead ends: 143 [2024-09-12 23:20:55,265 INFO L226 Difference]: Without dead ends: 94 [2024-09-12 23:20:55,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-09-12 23:20:55,266 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:20:55,266 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 276 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:20:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-12 23:20:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-09-12 23:20:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-12 23:20:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-09-12 23:20:55,301 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 73 [2024-09-12 23:20:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:20:55,301 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-09-12 23:20:55,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2024-09-12 23:20:55,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-09-12 23:20:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-12 23:20:55,304 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:20:55,305 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:20:55,321 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 23:20:55,505 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:55,506 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:20:55,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:20:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 721076372, now seen corresponding path program 2 times [2024-09-12 23:20:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:20:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310765309] [2024-09-12 23:20:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:20:55,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:20:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:20:55,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98438612] [2024-09-12 23:20:55,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:20:55,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:20:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:20:55,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:20:55,539 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 23:20:55,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:20:55,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:20:55,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-12 23:20:55,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:20:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-12 23:20:55,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:21:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-12 23:21:04,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:21:04,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310765309] [2024-09-12 23:21:04,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:21:04,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98438612] [2024-09-12 23:21:04,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98438612] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:21:04,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:21:04,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-12 23:21:04,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989055258] [2024-09-12 23:21:04,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:21:04,701 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 23:21:04,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:21:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 23:21:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-09-12 23:21:04,702 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-12 23:21:12,084 WARN L293 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 168 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 23:21:15,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 23:21:16,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 23:21:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:21:18,325 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2024-09-12 23:21:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 23:21:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 87 [2024-09-12 23:21:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:21:18,328 INFO L225 Difference]: With dead ends: 199 [2024-09-12 23:21:18,328 INFO L226 Difference]: Without dead ends: 166 [2024-09-12 23:21:18,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2024-09-12 23:21:18,329 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-12 23:21:18,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 314 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-09-12 23:21:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-12 23:21:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2024-09-12 23:21:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 103 states have internal predecessors, (113), 51 states have call successors, (51), 16 states have call predecessors, (51), 15 states have return successors, (49), 42 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-12 23:21:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 213 transitions. [2024-09-12 23:21:18,389 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 213 transitions. Word has length 87 [2024-09-12 23:21:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:21:18,390 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 213 transitions. [2024-09-12 23:21:18,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-12 23:21:18,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 213 transitions. [2024-09-12 23:21:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-12 23:21:18,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:21:18,392 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:21:18,410 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 23:21:18,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:21:18,597 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:21:18,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1885445924, now seen corresponding path program 2 times [2024-09-12 23:21:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:21:18,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179216828] [2024-09-12 23:21:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:21:18,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:21:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:21:18,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483624910] [2024-09-12 23:21:18,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:21:18,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:21:18,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:21:18,634 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:21:18,636 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 23:21:18,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:21:18,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:21:18,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 23:21:18,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:21:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-12 23:21:19,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:21:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-12 23:21:20,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:21:20,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179216828] [2024-09-12 23:21:20,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:21:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483624910] [2024-09-12 23:21:20,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483624910] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:21:20,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:21:20,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-09-12 23:21:20,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443746412] [2024-09-12 23:21:20,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:21:20,846 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 23:21:20,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:21:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 23:21:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-09-12 23:21:20,847 INFO L87 Difference]: Start difference. First operand 162 states and 213 transitions. Second operand has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-12 23:21:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:21:23,883 INFO L93 Difference]: Finished difference Result 230 states and 303 transitions. [2024-09-12 23:21:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 23:21:23,883 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) Word has length 98 [2024-09-12 23:21:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:21:23,885 INFO L225 Difference]: With dead ends: 230 [2024-09-12 23:21:23,885 INFO L226 Difference]: Without dead ends: 167 [2024-09-12 23:21:23,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 23:21:23,887 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-12 23:21:23,887 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 309 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-12 23:21:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-12 23:21:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2024-09-12 23:21:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 93 states have internal predecessors, (98), 42 states have call successors, (42), 17 states have call predecessors, (42), 16 states have return successors, (40), 34 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-12 23:21:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2024-09-12 23:21:23,939 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 98 [2024-09-12 23:21:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:21:23,939 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2024-09-12 23:21:23,939 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-12 23:21:23,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2024-09-12 23:21:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-12 23:21:23,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:21:23,941 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:21:23,956 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 23:21:24,141 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:21:24,142 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:21:24,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1238144755, now seen corresponding path program 2 times [2024-09-12 23:21:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:21:24,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541960817] [2024-09-12 23:21:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:21:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:21:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:21:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 23:21:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 23:21:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:21:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 23:21:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 23:21:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 23:21:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 23:21:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 23:21:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 23:21:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 23:21:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 23:21:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 23:21:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 23:21:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 23:21:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 23:21:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 23:21:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-12 23:21:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:21:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541960817] [2024-09-12 23:21:24,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541960817] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:21:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749413990] [2024-09-12 23:21:24,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 23:21:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:21:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:21:24,580 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:21:24,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 23:21:24,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 23:21:24,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:21:24,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 23:21:24,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:21:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-12 23:21:24,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:21:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-12 23:21:25,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749413990] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:21:25,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:21:25,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 19 [2024-09-12 23:21:25,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057816499] [2024-09-12 23:21:25,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:21:25,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 23:21:25,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:21:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 23:21:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-12 23:21:25,869 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-12 23:21:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:21:26,180 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2024-09-12 23:21:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 23:21:26,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) Word has length 103 [2024-09-12 23:21:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:21:26,182 INFO L225 Difference]: With dead ends: 170 [2024-09-12 23:21:26,182 INFO L226 Difference]: Without dead ends: 132 [2024-09-12 23:21:26,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:21:26,183 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:21:26,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 357 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 23:21:26,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-12 23:21:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-09-12 23:21:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 84 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-12 23:21:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2024-09-12 23:21:26,237 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 103 [2024-09-12 23:21:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:21:26,237 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2024-09-12 23:21:26,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-12 23:21:26,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2024-09-12 23:21:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-12 23:21:26,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:21:26,239 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:21:26,251 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 23:21:26,439 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 23:21:26,439 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:21:26,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash -840147397, now seen corresponding path program 1 times [2024-09-12 23:21:26,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:21:26,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38918312] [2024-09-12 23:21:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:21:26,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:21:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 23:21:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 23:21:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 23:21:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 23:21:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 23:21:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 23:21:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 23:21:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 23:21:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 23:21:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 23:21:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 23:21:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 23:21:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 23:21:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 23:21:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 23:21:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 23:21:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-12 23:21:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-12 23:21:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-12 23:21:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-12 23:21:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:21:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38918312] [2024-09-12 23:21:26,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38918312] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:21:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784267854] [2024-09-12 23:21:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:21:26,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:21:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:21:26,636 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:21:26,638 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 23:21:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 23:21:26,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 23:21:26,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:21:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-12 23:21:26,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:21:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-12 23:21:26,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784267854] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:21:26,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 23:21:26,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-09-12 23:21:26,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592865859] [2024-09-12 23:21:26,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 23:21:26,895 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 23:21:26,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:21:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 23:21:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-12 23:21:26,896 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-12 23:21:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:21:27,023 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2024-09-12 23:21:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 23:21:27,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 115 [2024-09-12 23:21:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:21:27,025 INFO L225 Difference]: With dead ends: 138 [2024-09-12 23:21:27,025 INFO L226 Difference]: Without dead ends: 131 [2024-09-12 23:21:27,026 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-12 23:21:27,026 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:21:27,026 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 168 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:21:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-12 23:21:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2024-09-12 23:21:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 33 states have call successors, (33), 17 states have call predecessors, (33), 16 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-12 23:21:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2024-09-12 23:21:27,083 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 115 [2024-09-12 23:21:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:21:27,083 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2024-09-12 23:21:27,083 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-12 23:21:27,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2024-09-12 23:21:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-12 23:21:27,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:21:27,085 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:21:27,101 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 23:21:27,285 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 23:21:27,286 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:21:27,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1808323179, now seen corresponding path program 3 times [2024-09-12 23:21:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:21:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098785693] [2024-09-12 23:21:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:21:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:21:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:21:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113403692] [2024-09-12 23:21:27,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:21:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:21:27,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:21:27,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:21:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 23:21:27,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 23:21:27,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:21:27,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 23:21:27,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:21:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-12 23:21:27,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:21:33,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:21:33,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098785693] [2024-09-12 23:21:33,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:21:33,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113403692] [2024-09-12 23:21:33,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113403692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 23:21:33,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 23:21:33,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-12 23:21:33,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765259149] [2024-09-12 23:21:33,162 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 23:21:33,163 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 23:21:33,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:21:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 23:21:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2024-09-12 23:21:33,163 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 23:21:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:21:33,379 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2024-09-12 23:21:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 23:21:33,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 117 [2024-09-12 23:21:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:21:33,381 INFO L225 Difference]: With dead ends: 133 [2024-09-12 23:21:33,381 INFO L226 Difference]: Without dead ends: 131 [2024-09-12 23:21:33,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=40, Invalid=141, Unknown=1, NotChecked=0, Total=182 [2024-09-12 23:21:33,382 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 23:21:33,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 23:21:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-12 23:21:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-09-12 23:21:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.1125) internal successors, (89), 84 states have internal predecessors, (89), 33 states have call successors, (33), 18 states have call predecessors, (33), 17 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-12 23:21:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-12 23:21:33,448 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 117 [2024-09-12 23:21:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:21:33,449 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-12 23:21:33,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 23:21:33,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-12 23:21:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 23:21:33,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 23:21:33,451 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:21:33,465 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 23:21:33,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 23:21:33,654 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 23:21:33,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash -725567613, now seen corresponding path program 3 times [2024-09-12 23:21:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 23:21:33,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039347891] [2024-09-12 23:21:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 23:21:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 23:21:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 23:21:33,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895808407] [2024-09-12 23:21:33,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 23:21:33,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 23:21:33,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 23:21:33,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 23:21:33,684 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 23:21:33,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 23:21:33,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 23:21:33,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 23:21:33,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 23:21:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 163 proven. 53 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2024-09-12 23:21:33,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 23:21:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-09-12 23:21:34,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 23:21:34,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039347891] [2024-09-12 23:21:34,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 23:21:34,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895808407] [2024-09-12 23:21:34,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895808407] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 23:21:34,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 23:21:34,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-12 23:21:34,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881592348] [2024-09-12 23:21:34,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 23:21:34,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 23:21:34,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 23:21:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 23:21:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-12 23:21:34,222 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2024-09-12 23:21:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 23:21:34,553 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2024-09-12 23:21:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 23:21:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 128 [2024-09-12 23:21:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 23:21:34,555 INFO L225 Difference]: With dead ends: 132 [2024-09-12 23:21:34,555 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 23:21:34,555 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-09-12 23:21:34,556 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 23:21:34,556 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 114 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 23:21:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 23:21:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 23:21:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-12 23:21:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 23:21:34,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2024-09-12 23:21:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 23:21:34,557 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 23:21:34,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2024-09-12 23:21:34,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 23:21:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 23:21:34,560 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 23:21:34,563 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 23:21:34,579 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 23:21:34,767 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 23:21:34,770 INFO L408 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 23:21:34,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 23:21:37,957 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 23:21:37,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 11:21:37 BoogieIcfgContainer [2024-09-12 23:21:37,969 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 23:21:37,970 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 23:21:37,970 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 23:21:37,970 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 23:21:37,970 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 11:20:46" (3/4) ... [2024-09-12 23:21:37,972 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 23:21:37,975 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 23:21:37,975 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 23:21:37,975 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 23:21:37,978 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2024-09-12 23:21:37,978 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-09-12 23:21:37,978 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-12 23:21:37,979 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 23:21:37,979 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 23:21:38,058 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 23:21:38,059 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 23:21:38,059 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 23:21:38,060 INFO L158 Benchmark]: Toolchain (without parser) took 51917.70ms. Allocated memory was 184.5MB in the beginning and 448.8MB in the end (delta: 264.2MB). Free memory was 128.4MB in the beginning and 350.0MB in the end (delta: -221.7MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2024-09-12 23:21:38,060 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 184.5MB. Free memory is still 149.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 23:21:38,060 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.73ms. Allocated memory is still 184.5MB. Free memory was 128.4MB in the beginning and 116.5MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 23:21:38,061 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.45ms. Allocated memory is still 184.5MB. Free memory was 116.5MB in the beginning and 115.8MB in the end (delta: 702.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 23:21:38,061 INFO L158 Benchmark]: Boogie Preprocessor took 42.30ms. Allocated memory is still 184.5MB. Free memory was 115.8MB in the beginning and 113.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 23:21:38,061 INFO L158 Benchmark]: RCFGBuilder took 358.70ms. Allocated memory is still 184.5MB. Free memory was 113.7MB in the beginning and 100.4MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 23:21:38,062 INFO L158 Benchmark]: TraceAbstraction took 51193.08ms. Allocated memory was 184.5MB in the beginning and 448.8MB in the end (delta: 264.2MB). Free memory was 99.7MB in the beginning and 355.3MB in the end (delta: -255.6MB). Peak memory consumption was 218.0MB. Max. memory is 16.1GB. [2024-09-12 23:21:38,062 INFO L158 Benchmark]: Witness Printer took 89.26ms. Allocated memory is still 448.8MB. Free memory was 355.3MB in the beginning and 350.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-12 23:21:38,063 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 184.5MB. Free memory is still 149.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 205.73ms. Allocated memory is still 184.5MB. Free memory was 128.4MB in the beginning and 116.5MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.45ms. Allocated memory is still 184.5MB. Free memory was 116.5MB in the beginning and 115.8MB in the end (delta: 702.3kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.30ms. Allocated memory is still 184.5MB. Free memory was 115.8MB in the beginning and 113.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 358.70ms. Allocated memory is still 184.5MB. Free memory was 113.7MB in the beginning and 100.4MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 51193.08ms. Allocated memory was 184.5MB in the beginning and 448.8MB in the end (delta: 264.2MB). Free memory was 99.7MB in the beginning and 355.3MB in the end (delta: -255.6MB). Peak memory consumption was 218.0MB. Max. memory is 16.1GB. * Witness Printer took 89.26ms. Allocated memory is still 448.8MB. Free memory was 355.3MB in the beginning and 350.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47.9s, OverallIterations: 15, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 19.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 298 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 2594 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2165 mSDsCounter, 403 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2357 IncrementalHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 403 mSolverCounterUnsat, 429 mSDtfsCounter, 2357 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1889 GetRequests, 1683 SyntacticMatches, 15 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 17.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=10, InterpolantAutomatonStates: 148, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 74 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 23.9s InterpolantComputationTime, 1928 NumberOfCodeBlocks, 1801 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 20692 SizeOfPredicates, 25 NumberOfNonLiveVariables, 2125 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 8825/9435 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((((((A == r) && ((A + d) == (p + r))) && (8 <= p)) && (q == 0)) && (B == 1)) || ((((((A == r) && (p == 2)) && (1 <= r)) && (d == 2)) && (q == 0)) && (B == 1))) || ((((((A == r) && (d == 4)) && (2 <= r)) && (q == 0)) && (B == 1)) && (p == 4))) || (((((A == r) && (d == 1)) && (q == 0)) && (B == 1)) && (p == 1))) - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: ((((A == (q + r)) && (d == p)) && (1 <= p)) && (B == 1)) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-12 23:21:38,229 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE