./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.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 04d6fb36 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/loop-invariants/linear-inequality-inv-a.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 d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 --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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:55:46,227 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:55:46,293 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:55:46,297 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:55:46,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:55:46,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:55:46,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:55:46,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:55:46,329 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:55:46,330 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:55:46,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:55:46,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:55:46,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:55:46,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:55:46,333 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:55:46,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:55:46,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:55:46,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:55:46,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:55:46,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:55:46,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:55:46,335 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:55:46,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:55:46,336 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:55:46,336 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:55:46,336 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:55:46,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:55:46,337 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:55:46,337 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:55:46,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:55:46,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:55:46,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:55:46,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:55:46,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:55:46,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:55:46,339 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:55:46,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:55:46,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:55:46,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:55:46,347 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:55:46,348 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:55:46,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:55:46,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:55:46,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:55:46,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:55:46,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:55:46,685 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:55:46,685 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:55:46,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-09-15 18:55:48,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:55:48,378 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:55:48,379 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-09-15 18:55:48,387 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9dc6cfe03/fc308a1df3ab4b13a7fc7e0aeb153a61/FLAGf6ab34457 [2024-09-15 18:55:48,773 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9dc6cfe03/fc308a1df3ab4b13a7fc7e0aeb153a61 [2024-09-15 18:55:48,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:55:48,777 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:55:48,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:55:48,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:55:48,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:55:48,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:55:48" (1/1) ... [2024-09-15 18:55:48,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4434da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:48, skipping insertion in model container [2024-09-15 18:55:48,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:55:48" (1/1) ... [2024-09-15 18:55:48,809 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:55:48,963 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-09-15 18:55:48,967 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-09-15 18:55:48,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:55:48,983 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:55:48,995 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-09-15 18:55:48,995 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-09-15 18:55:48,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:55:49,011 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:55:49,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49 WrapperNode [2024-09-15 18:55:49,012 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:55:49,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:55:49,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:55:49,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:55:49,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,031 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:55:49,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:55:49,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:55:49,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:55:49,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:55:49,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,046 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,056 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-15 18:55:49,056 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,067 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,069 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:55:49,070 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:55:49,070 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:55:49,070 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:55:49,071 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (1/1) ... [2024-09-15 18:55:49,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:55:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:49,104 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) [2024-09-15 18:55:49,108 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 [2024-09-15 18:55:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:55:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:55:49,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:55:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:55:49,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:55:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:55:49,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:55:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:55:49,224 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:55:49,227 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:55:49,361 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-15 18:55:49,361 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:55:49,380 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:55:49,380 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 18:55:49,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:55:49 BoogieIcfgContainer [2024-09-15 18:55:49,381 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:55:49,396 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:55:49,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:55:49,400 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:55:49,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:55:48" (1/3) ... [2024-09-15 18:55:49,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9954f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:55:49, skipping insertion in model container [2024-09-15 18:55:49,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:55:49" (2/3) ... [2024-09-15 18:55:49,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9954f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:55:49, skipping insertion in model container [2024-09-15 18:55:49,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:55:49" (3/3) ... [2024-09-15 18:55:49,402 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2024-09-15 18:55:49,416 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:55:49,417 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-15 18:55:49,478 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:55:49,485 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;@4ed251c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:55:49,486 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-15 18:55:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:55:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-15 18:55:49,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:49,499 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:49,500 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:49,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1128209337, now seen corresponding path program 1 times [2024-09-15 18:55:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:49,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420645063] [2024-09-15 18:55:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:49,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:49,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:49,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:49,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420645063] [2024-09-15 18:55:49,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420645063] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:55:49,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:55:49,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:55:49,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533249013] [2024-09-15 18:55:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:55:49,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:55:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:55:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:55:49,866 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:49,923 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-09-15 18:55:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:55:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-09-15 18:55:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:49,940 INFO L225 Difference]: With dead ends: 28 [2024-09-15 18:55:49,942 INFO L226 Difference]: Without dead ends: 14 [2024-09-15 18:55:49,945 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:55:49,948 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:49,952 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-15 18:55:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-15 18:55:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-09-15 18:55:49,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2024-09-15 18:55:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:49,986 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-09-15 18:55:49,986 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:49,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-09-15 18:55:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-15 18:55:49,989 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:49,989 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:49,989 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:55:49,989 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:49,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash -614699191, now seen corresponding path program 1 times [2024-09-15 18:55:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342229586] [2024-09-15 18:55:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:49,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:50,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:50,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:50,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342229586] [2024-09-15 18:55:50,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342229586] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:50,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893681275] [2024-09-15 18:55:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:50,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:50,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:50,191 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) [2024-09-15 18:55:50,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:55:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:50,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 18:55:50,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:50,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893681275] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:50,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:50,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-15 18:55:50,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319851542] [2024-09-15 18:55:50,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:50,487 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:55:50,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:55:50,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:55:50,489 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:50,578 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-09-15 18:55:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:55:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-15 18:55:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:50,580 INFO L225 Difference]: With dead ends: 23 [2024-09-15 18:55:50,580 INFO L226 Difference]: Without dead ends: 21 [2024-09-15 18:55:50,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:55:50,581 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:50,582 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-15 18:55:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-09-15 18:55:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-09-15 18:55:50,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-09-15 18:55:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:50,591 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-09-15 18:55:50,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:50,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-09-15 18:55:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 18:55:50,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:50,593 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:50,612 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:55:50,798 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:50,799 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:50,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1875802668, now seen corresponding path program 1 times [2024-09-15 18:55:50,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:50,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263682319] [2024-09-15 18:55:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:50,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:50,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:50,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:50,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263682319] [2024-09-15 18:55:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263682319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:50,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745895690] [2024-09-15 18:55:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:50,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:50,919 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) [2024-09-15 18:55:50,929 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:55:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:50,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 18:55:50,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:51,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745895690] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:51,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:51,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-15 18:55:51,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179312015] [2024-09-15 18:55:51,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:51,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:55:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:55:51,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:55:51,079 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:51,123 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-09-15 18:55:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:55:51,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-15 18:55:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:51,125 INFO L225 Difference]: With dead ends: 25 [2024-09-15 18:55:51,125 INFO L226 Difference]: Without dead ends: 17 [2024-09-15 18:55:51,125 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:55:51,127 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:51,128 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-15 18:55:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-15 18:55:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-09-15 18:55:51,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2024-09-15 18:55:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:51,137 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-09-15 18:55:51,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:51,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-09-15 18:55:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-15 18:55:51,138 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:51,138 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:51,156 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:51,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:51,339 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:51,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1288475847, now seen corresponding path program 2 times [2024-09-15 18:55:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730096588] [2024-09-15 18:55:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:51,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:51,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:51,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730096588] [2024-09-15 18:55:51,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730096588] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:51,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625466712] [2024-09-15 18:55:51,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:51,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:51,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:51,566 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) [2024-09-15 18:55:51,568 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:55:51,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:51,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:51,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:55:51,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:51,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:51,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625466712] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:51,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:51,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-15 18:55:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463072596] [2024-09-15 18:55:51,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:51,891 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 18:55:51,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 18:55:51,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:55:51,892 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:52,078 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-09-15 18:55:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 18:55:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-15 18:55:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:52,082 INFO L225 Difference]: With dead ends: 35 [2024-09-15 18:55:52,082 INFO L226 Difference]: Without dead ends: 33 [2024-09-15 18:55:52,083 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:55:52,085 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:52,087 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:55:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-15 18:55:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2024-09-15 18:55:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-09-15 18:55:52,097 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2024-09-15 18:55:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:52,098 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-09-15 18:55:52,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:52,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-09-15 18:55:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:55:52,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:52,100 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:52,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 18:55:52,300 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:52,301 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:52,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1288048662, now seen corresponding path program 2 times [2024-09-15 18:55:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:52,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134021171] [2024-09-15 18:55:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:52,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:52,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134021171] [2024-09-15 18:55:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134021171] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79066972] [2024-09-15 18:55:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:52,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:52,451 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) [2024-09-15 18:55:52,455 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:55:52,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:52,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:55:52,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:52,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:52,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79066972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:52,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:52,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-09-15 18:55:52,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151299930] [2024-09-15 18:55:52,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:52,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:55:52,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:55:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:55:52,700 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:52,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:52,745 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-09-15 18:55:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 18:55:52,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-15 18:55:52,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:52,746 INFO L225 Difference]: With dead ends: 37 [2024-09-15 18:55:52,747 INFO L226 Difference]: Without dead ends: 23 [2024-09-15 18:55:52,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:55:52,748 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:52,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-15 18:55:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-15 18:55:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-09-15 18:55:52,753 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2024-09-15 18:55:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:52,753 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-09-15 18:55:52,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:52,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-09-15 18:55:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 18:55:52,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:52,754 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:52,773 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:52,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:52,955 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:52,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash 599336327, now seen corresponding path program 3 times [2024-09-15 18:55:52,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:52,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540428485] [2024-09-15 18:55:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:53,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:53,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540428485] [2024-09-15 18:55:53,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540428485] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743866128] [2024-09-15 18:55:53,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:53,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:53,332 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) [2024-09-15 18:55:53,336 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:55:53,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-15 18:55:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:53,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 18:55:53,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:53,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:54,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743866128] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:54,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:54,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-15 18:55:54,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613301831] [2024-09-15 18:55:54,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:54,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 18:55:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 18:55:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=350, Unknown=0, NotChecked=0, Total=600 [2024-09-15 18:55:54,250 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:54,759 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2024-09-15 18:55:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-15 18:55:54,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-15 18:55:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:54,760 INFO L225 Difference]: With dead ends: 59 [2024-09-15 18:55:54,760 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 18:55:54,761 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=750, Invalid=1230, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:55:54,762 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:54,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 77 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:55:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 18:55:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2024-09-15 18:55:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2024-09-15 18:55:54,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 19 [2024-09-15 18:55:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:54,775 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2024-09-15 18:55:54,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:54,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2024-09-15 18:55:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-15 18:55:54,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:54,776 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:54,791 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:55:54,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 18:55:54,981 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:54,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1399560022, now seen corresponding path program 3 times [2024-09-15 18:55:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:54,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390616635] [2024-09-15 18:55:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:55,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:55,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:55,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390616635] [2024-09-15 18:55:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390616635] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:55,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681164106] [2024-09-15 18:55:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:55,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:55,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:55,324 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) [2024-09-15 18:55:55,325 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:55:55,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-15 18:55:55,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:55,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 18:55:55,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:55,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681164106] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:55,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:55,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-15 18:55:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716494791] [2024-09-15 18:55:55,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:55,891 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:55:55,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:55,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:55:55,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:55:55,893 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:55,981 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-09-15 18:55:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 18:55:55,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-15 18:55:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:55,982 INFO L225 Difference]: With dead ends: 61 [2024-09-15 18:55:55,982 INFO L226 Difference]: Without dead ends: 35 [2024-09-15 18:55:55,983 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:55:55,983 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:55,984 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:55:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-15 18:55:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-15 18:55:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2024-09-15 18:55:55,996 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 20 [2024-09-15 18:55:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:55,997 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2024-09-15 18:55:55,997 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:55:55,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2024-09-15 18:55:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:55:55,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:55,998 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:56,014 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:55:56,198 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:56,199 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:56,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1300261113, now seen corresponding path program 4 times [2024-09-15 18:55:56,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:56,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165888355] [2024-09-15 18:55:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:57,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:57,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:57,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165888355] [2024-09-15 18:55:57,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165888355] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:57,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82502819] [2024-09-15 18:55:57,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:55:57,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:57,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:57,153 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) [2024-09-15 18:55:57,164 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:55:57,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:55:57,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:57,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 18:55:57,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:57,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:55:59,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82502819] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:59,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:59,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-15 18:55:59,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423989073] [2024-09-15 18:55:59,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:59,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-15 18:55:59,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-15 18:55:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=1286, Unknown=0, NotChecked=0, Total=2352 [2024-09-15 18:55:59,026 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:00,457 INFO L93 Difference]: Finished difference Result 107 states and 154 transitions. [2024-09-15 18:56:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-09-15 18:56:00,458 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-15 18:56:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:00,459 INFO L225 Difference]: With dead ends: 107 [2024-09-15 18:56:00,459 INFO L226 Difference]: Without dead ends: 105 [2024-09-15 18:56:00,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3222, Invalid=5334, Unknown=0, NotChecked=0, Total=8556 [2024-09-15 18:56:00,465 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:00,465 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 84 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:56:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-15 18:56:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 60. [2024-09-15 18:56:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 56 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2024-09-15 18:56:00,479 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 31 [2024-09-15 18:56:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:00,480 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2024-09-15 18:56:00,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:00,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2024-09-15 18:56:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 18:56:00,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:00,481 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:00,498 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 18:56:00,685 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:00,686 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:00,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1653385770, now seen corresponding path program 4 times [2024-09-15 18:56:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:00,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105553319] [2024-09-15 18:56:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:00,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:01,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:01,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:01,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105553319] [2024-09-15 18:56:01,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105553319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:01,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182972217] [2024-09-15 18:56:01,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:56:01,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:01,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:01,578 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) [2024-09-15 18:56:01,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 18:56:02,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:56:02,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:02,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 18:56:02,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:02,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182972217] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:03,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-09-15 18:56:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847422056] [2024-09-15 18:56:03,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:03,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:56:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:56:03,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:56:03,206 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:03,341 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2024-09-15 18:56:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-15 18:56:03,341 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-15 18:56:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:03,342 INFO L225 Difference]: With dead ends: 109 [2024-09-15 18:56:03,342 INFO L226 Difference]: Without dead ends: 59 [2024-09-15 18:56:03,343 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:56:03,344 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:03,344 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 71 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:56:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-15 18:56:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-15 18:56:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2024-09-15 18:56:03,353 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 32 [2024-09-15 18:56:03,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:03,353 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2024-09-15 18:56:03,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:03,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2024-09-15 18:56:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-15 18:56:03,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:03,355 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:03,371 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 18:56:03,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:03,556 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:03,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:03,557 INFO L85 PathProgramCache]: Analyzing trace with hash -426657273, now seen corresponding path program 5 times [2024-09-15 18:56:03,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:03,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862870139] [2024-09-15 18:56:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:03,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:06,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:06,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862870139] [2024-09-15 18:56:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862870139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719548670] [2024-09-15 18:56:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:56:06,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:06,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:06,388 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) [2024-09-15 18:56:06,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 18:56:07,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-15 18:56:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:07,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-15 18:56:07,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:08,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719548670] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:11,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-09-15 18:56:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388929680] [2024-09-15 18:56:11,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:11,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-09-15 18:56:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-09-15 18:56:11,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4426, Invalid=4886, Unknown=0, NotChecked=0, Total=9312 [2024-09-15 18:56:11,665 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:15,007 INFO L93 Difference]: Finished difference Result 203 states and 298 transitions. [2024-09-15 18:56:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-09-15 18:56:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-09-15 18:56:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:15,009 INFO L225 Difference]: With dead ends: 203 [2024-09-15 18:56:15,009 INFO L226 Difference]: Without dead ends: 201 [2024-09-15 18:56:15,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7521 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=13350, Invalid=22182, Unknown=0, NotChecked=0, Total=35532 [2024-09-15 18:56:15,016 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 254 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:15,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 127 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:56:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-15 18:56:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 108. [2024-09-15 18:56:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 104 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2024-09-15 18:56:15,032 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 55 [2024-09-15 18:56:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:15,033 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2024-09-15 18:56:15,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:15,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2024-09-15 18:56:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:56:15,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:15,034 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:15,048 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:15,235 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 18:56:15,235 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:15,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -341470506, now seen corresponding path program 5 times [2024-09-15 18:56:15,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:15,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336957150] [2024-09-15 18:56:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:15,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:17,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:17,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:17,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336957150] [2024-09-15 18:56:17,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336957150] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:17,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199554846] [2024-09-15 18:56:17,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:56:17,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:17,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:17,969 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) [2024-09-15 18:56:17,969 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 18:56:19,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-15 18:56:19,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:19,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-15 18:56:19,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:19,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199554846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:22,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:22,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-09-15 18:56:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664055995] [2024-09-15 18:56:22,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:22,953 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-09-15 18:56:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-09-15 18:56:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-09-15 18:56:22,956 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:23,272 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2024-09-15 18:56:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-15 18:56:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-15 18:56:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:23,274 INFO L225 Difference]: With dead ends: 205 [2024-09-15 18:56:23,274 INFO L226 Difference]: Without dead ends: 107 [2024-09-15 18:56:23,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-09-15 18:56:23,276 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 328 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:23,276 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 92 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:56:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-15 18:56:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-09-15 18:56:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 103 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2024-09-15 18:56:23,289 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 56 [2024-09-15 18:56:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:23,290 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2024-09-15 18:56:23,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:56:23,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2024-09-15 18:56:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-15 18:56:23,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:23,294 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:23,308 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:23,495 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 18:56:23,495 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:23,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash -146079737, now seen corresponding path program 6 times [2024-09-15 18:56:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:23,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338380079] [2024-09-15 18:56:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:33,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:33,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338380079] [2024-09-15 18:56:33,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338380079] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954275656] [2024-09-15 18:56:33,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:56:33,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:33,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:33,047 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) [2024-09-15 18:56:33,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 18:56:37,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-15 18:56:37,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:37,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-15 18:56:37,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:37,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:56:49,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954275656] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:49,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:49,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-09-15 18:56:49,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317434689] [2024-09-15 18:56:49,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:49,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-09-15 18:56:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-09-15 18:56:49,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18058, Invalid=18998, Unknown=0, NotChecked=0, Total=37056 [2024-09-15 18:56:49,867 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:57:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:02,577 INFO L93 Difference]: Finished difference Result 395 states and 586 transitions. [2024-09-15 18:57:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-09-15 18:57:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2024-09-15 18:57:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:02,580 INFO L225 Difference]: With dead ends: 395 [2024-09-15 18:57:02,580 INFO L226 Difference]: Without dead ends: 393 [2024-09-15 18:57:02,590 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=54342, Invalid=90438, Unknown=0, NotChecked=0, Total=144780 [2024-09-15 18:57:02,592 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 815 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:02,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 151 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:57:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-09-15 18:57:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 204. [2024-09-15 18:57:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.4924623115577889) internal successors, (297), 200 states have internal predecessors, (297), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:57:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 300 transitions. [2024-09-15 18:57:02,615 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 300 transitions. Word has length 103 [2024-09-15 18:57:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:02,616 INFO L474 AbstractCegarLoop]: Abstraction has 204 states and 300 transitions. [2024-09-15 18:57:02,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:57:02,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 300 transitions. [2024-09-15 18:57:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-15 18:57:02,620 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:02,620 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:02,636 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 18:57:02,821 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:02,821 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:02,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash -233501482, now seen corresponding path program 6 times [2024-09-15 18:57:02,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:02,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072219492] [2024-09-15 18:57:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:02,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:11,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:57:11,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072219492] [2024-09-15 18:57:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072219492] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110977396] [2024-09-15 18:57:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:57:11,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:11,717 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) [2024-09-15 18:57:11,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 18:57:20,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-15 18:57:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:20,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-15 18:57:20,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:57:20,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:57:33,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110977396] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:33,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:33,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 192 [2024-09-15 18:57:33,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136367637] [2024-09-15 18:57:33,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:33,126 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-09-15 18:57:33,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-09-15 18:57:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-09-15 18:57:33,132 INFO L87 Difference]: Start difference. First operand 204 states and 300 transitions. Second operand has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:57:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:34,409 INFO L93 Difference]: Finished difference Result 397 states and 492 transitions. [2024-09-15 18:57:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-09-15 18:57:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2024-09-15 18:57:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:34,411 INFO L225 Difference]: With dead ends: 397 [2024-09-15 18:57:34,411 INFO L226 Difference]: Without dead ends: 203 [2024-09-15 18:57:34,413 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-09-15 18:57:34,414 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 754 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:34,414 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 151 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:57:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-15 18:57:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-09-15 18:57:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 199 states have internal predecessors, (200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:57:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2024-09-15 18:57:34,433 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 104 [2024-09-15 18:57:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:34,433 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2024-09-15 18:57:34,433 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:57:34,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2024-09-15 18:57:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-09-15 18:57:34,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:34,436 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:34,449 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 18:57:34,636 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 18:57:34,637 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:34,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1357804537, now seen corresponding path program 7 times [2024-09-15 18:57:34,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:34,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479619183] [2024-09-15 18:57:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:11,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:58:11,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479619183] [2024-09-15 18:58:11,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479619183] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098231101] [2024-09-15 18:58:11,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:58:11,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:11,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:11,944 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:11,944 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 18:58:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:13,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-09-15 18:58:13,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:58:13,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:58:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098231101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:59,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:59,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-09-15 18:58:59,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685877397] [2024-09-15 18:58:59,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:59,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-09-15 18:58:59,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-09-15 18:58:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72970, Invalid=74870, Unknown=0, NotChecked=0, Total=147840 [2024-09-15 18:58:59,816 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 385 states have internal predecessors, (392), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)