./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de31.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/loops-crafted-1/in-de31.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 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:26:53,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:26:53,767 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:26:53,775 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:26:53,775 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:26:53,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:26:53,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:26:53,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:26:53,802 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:26:53,802 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:26:53,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:26:53,803 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:26:53,803 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:26:53,803 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:26:53,804 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:26:53,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:26:53,804 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:26:53,804 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:26:53,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:26:53,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:26:53,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:26:53,808 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:26:53,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:26:53,808 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:26:53,809 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:26:53,809 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:26:53,809 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:26:53,809 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:26:53,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:26:53,810 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:26:53,810 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:26:53,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:26:53,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:26:53,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:26:53,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:26:53,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:26:53,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:26:53,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:26:53,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:26:53,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:26:53,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:26:53,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:26:53,813 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 -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 10:26:54,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:26:54,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:26:54,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:26:54,101 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:26:54,101 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:26:54,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de31.c [2024-09-25 10:26:55,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:26:55,614 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:26:55,615 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de31.c [2024-09-25 10:26:55,620 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/66071880e/9255b53349964c03a98972d57edebb3f/FLAG67eb30ee6 [2024-09-25 10:26:55,632 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/66071880e/9255b53349964c03a98972d57edebb3f [2024-09-25 10:26:55,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:26:55,637 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:26:55,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:26:55,639 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:26:55,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:26:55,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c1b25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55, skipping insertion in model container [2024-09-25 10:26:55,645 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,661 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:26:55,788 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/loops-crafted-1/in-de31.c[368,381] [2024-09-25 10:26:55,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:26:55,816 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:26:55,826 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/loops-crafted-1/in-de31.c[368,381] [2024-09-25 10:26:55,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:26:55,845 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:26:55,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55 WrapperNode [2024-09-25 10:26:55,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:26:55,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:26:55,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:26:55,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:26:55,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,860 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,865 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:26:55,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:26:55,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:26:55,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:26:55,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:26:55,886 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,888 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,902 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]. [2024-09-25 10:26:55,903 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,903 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:26:55,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:26:55,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:26:55,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:26:55,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (1/1) ... [2024-09-25 10:26:55,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:26:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:55,947 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) [2024-09-25 10:26:55,950 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 [2024-09-25 10:26:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:26:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:26:55,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:26:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:26:55,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:26:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:26:55,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:26:55,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:26:55,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:26:55,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:26:56,047 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:26:56,049 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:26:56,188 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-25 10:26:56,188 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:26:56,213 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:26:56,214 INFO L317 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-25 10:26:56,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:26:56 BoogieIcfgContainer [2024-09-25 10:26:56,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:26:56,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:26:56,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:26:56,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:26:56,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:26:55" (1/3) ... [2024-09-25 10:26:56,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e240e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:26:56, skipping insertion in model container [2024-09-25 10:26:56,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:26:55" (2/3) ... [2024-09-25 10:26:56,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e240e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:26:56, skipping insertion in model container [2024-09-25 10:26:56,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:26:56" (3/3) ... [2024-09-25 10:26:56,223 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de31.c [2024-09-25 10:26:56,238 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:26:56,238 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:26:56,289 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:26:56,296 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;@731a203a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:26:56,297 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:26:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:26:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:26:56,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:56,306 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:56,307 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:56,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1284096195, now seen corresponding path program 1 times [2024-09-25 10:26:56,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358293963] [2024-09-25 10:26:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:56,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:56,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:56,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358293963] [2024-09-25 10:26:56,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358293963] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:26:56,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:26:56,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 10:26:56,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408069175] [2024-09-25 10:26:56,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:26:56,467 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 10:26:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 10:26:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:26:56,490 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:56,515 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-09-25 10:26:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 10:26:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-25 10:26:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:56,523 INFO L225 Difference]: With dead ends: 34 [2024-09-25 10:26:56,523 INFO L226 Difference]: Without dead ends: 14 [2024-09-25 10:26:56,525 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:26:56,529 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:56,531 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:26:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-25 10:26:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-25 10:26:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-09-25 10:26:56,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2024-09-25 10:26:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:56,564 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-09-25 10:26:56,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:56,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:56,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-09-25 10:26:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:26:56,565 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:56,566 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:56,566 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:26:56,566 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:56,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:56,571 INFO L85 PathProgramCache]: Analyzing trace with hash 334597057, now seen corresponding path program 1 times [2024-09-25 10:26:56,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:56,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432389941] [2024-09-25 10:26:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:56,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432389941] [2024-09-25 10:26:56,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432389941] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:26:56,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:26:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 10:26:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261965968] [2024-09-25 10:26:56,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:26:56,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 10:26:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 10:26:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:26:56,964 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:57,076 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-09-25 10:26:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:26:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-25 10:26:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:57,079 INFO L225 Difference]: With dead ends: 30 [2024-09-25 10:26:57,079 INFO L226 Difference]: Without dead ends: 24 [2024-09-25 10:26:57,081 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:26:57,082 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:57,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:26:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-25 10:26:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2024-09-25 10:26:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-09-25 10:26:57,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2024-09-25 10:26:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:57,093 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-09-25 10:26:57,093 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-09-25 10:26:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:26:57,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:57,095 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:57,095 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 10:26:57,095 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:57,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1818111943, now seen corresponding path program 1 times [2024-09-25 10:26:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:57,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237481560] [2024-09-25 10:26:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:57,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:57,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237481560] [2024-09-25 10:26:57,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237481560] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:26:57,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:26:57,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 10:26:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280284517] [2024-09-25 10:26:57,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:26:57,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 10:26:57,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 10:26:57,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:26:57,144 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:57,155 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-09-25 10:26:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 10:26:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-25 10:26:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:57,156 INFO L225 Difference]: With dead ends: 24 [2024-09-25 10:26:57,161 INFO L226 Difference]: Without dead ends: 15 [2024-09-25 10:26:57,162 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 [2024-09-25 10:26:57,163 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:57,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:26:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-25 10:26:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-25 10:26:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-09-25 10:26:57,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 14 [2024-09-25 10:26:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:57,169 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-09-25 10:26:57,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-09-25 10:26:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:26:57,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:57,172 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:57,172 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-25 10:26:57,173 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:57,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1658494539, now seen corresponding path program 1 times [2024-09-25 10:26:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557680787] [2024-09-25 10:26:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:57,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:57,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557680787] [2024-09-25 10:26:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557680787] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510875929] [2024-09-25 10:26:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:57,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:57,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:57,264 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) [2024-09-25 10:26:57,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:26:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:57,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:26:57,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:57,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510875929] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:57,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:57,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-25 10:26:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66985680] [2024-09-25 10:26:57,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:57,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 10:26:57,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 10:26:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:26:57,374 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:57,461 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2024-09-25 10:26:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 10:26:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-25 10:26:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:57,462 INFO L225 Difference]: With dead ends: 38 [2024-09-25 10:26:57,462 INFO L226 Difference]: Without dead ends: 32 [2024-09-25 10:26:57,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:26:57,464 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:57,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:26:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-25 10:26:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-09-25 10:26:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-09-25 10:26:57,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 14 [2024-09-25 10:26:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:57,476 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-09-25 10:26:57,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:57,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-09-25 10:26:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-25 10:26:57,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:57,477 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:57,489 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 10:26:57,678 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:57,678 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:57,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1294830822, now seen corresponding path program 1 times [2024-09-25 10:26:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:57,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758673555] [2024-09-25 10:26:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:58,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:58,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:58,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758673555] [2024-09-25 10:26:58,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758673555] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:58,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084074311] [2024-09-25 10:26:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:58,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:58,029 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) [2024-09-25 10:26:58,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:26:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:58,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:26:58,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:58,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084074311] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:58,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:58,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-09-25 10:26:58,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846192695] [2024-09-25 10:26:58,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:58,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:26:58,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:26:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:26:58,423 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:58,963 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-25 10:26:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 10:26:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-25 10:26:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:58,964 INFO L225 Difference]: With dead ends: 46 [2024-09-25 10:26:58,964 INFO L226 Difference]: Without dead ends: 29 [2024-09-25 10:26:58,965 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:26:58,965 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:58,966 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 67 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:26:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-25 10:26:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2024-09-25 10:26:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-09-25 10:26:58,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2024-09-25 10:26:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:58,973 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-09-25 10:26:58,973 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:58,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-09-25 10:26:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 10:26:58,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:58,975 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:58,988 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:59,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:59,180 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:59,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1389270847, now seen corresponding path program 2 times [2024-09-25 10:26:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:59,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991975671] [2024-09-25 10:26:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:59,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:59,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:59,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991975671] [2024-09-25 10:26:59,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991975671] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:59,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367070156] [2024-09-25 10:26:59,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:26:59,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:59,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:59,290 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) [2024-09-25 10:26:59,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:26:59,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:26:59,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:59,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 10:26:59,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:59,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:26:59,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367070156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:59,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:59,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-25 10:26:59,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945714566] [2024-09-25 10:26:59,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:59,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 10:26:59,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:59,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 10:26:59,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:26:59,424 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:59,860 INFO L93 Difference]: Finished difference Result 76 states and 117 transitions. [2024-09-25 10:26:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:26:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-25 10:26:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:59,862 INFO L225 Difference]: With dead ends: 76 [2024-09-25 10:26:59,863 INFO L226 Difference]: Without dead ends: 70 [2024-09-25 10:26:59,864 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2024-09-25 10:26:59,865 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:59,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 104 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:26:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-25 10:26:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2024-09-25 10:26:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-09-25 10:26:59,881 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 17 [2024-09-25 10:26:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:59,882 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-09-25 10:26:59,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:26:59,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-09-25 10:26:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-25 10:26:59,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:59,884 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:59,896 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:00,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 10:27:00,084 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:00,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -648933578, now seen corresponding path program 2 times [2024-09-25 10:27:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:00,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755831620] [2024-09-25 10:27:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:00,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:00,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755831620] [2024-09-25 10:27:00,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755831620] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624215593] [2024-09-25 10:27:00,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:00,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:00,162 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) [2024-09-25 10:27:00,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:27:00,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:00,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:27:00,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:00,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624215593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:00,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-25 10:27:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783445652] [2024-09-25 10:27:00,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:00,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 10:27:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 10:27:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:27:00,272 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:00,369 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2024-09-25 10:27:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:27:00,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-25 10:27:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:00,370 INFO L225 Difference]: With dead ends: 70 [2024-09-25 10:27:00,370 INFO L226 Difference]: Without dead ends: 59 [2024-09-25 10:27:00,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:27:00,371 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:00,371 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-25 10:27:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-09-25 10:27:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-09-25 10:27:00,387 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 18 [2024-09-25 10:27:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:00,387 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-09-25 10:27:00,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:00,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-09-25 10:27:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 10:27:00,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:00,389 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:00,402 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:00,590 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:00,590 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:00,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 891793825, now seen corresponding path program 3 times [2024-09-25 10:27:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252616341] [2024-09-25 10:27:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:00,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252616341] [2024-09-25 10:27:00,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252616341] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888969411] [2024-09-25 10:27:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:00,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:00,913 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) [2024-09-25 10:27:00,915 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:27:00,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-25 10:27:00,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:00,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:27:00,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:01,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:01,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888969411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:01,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:01,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-09-25 10:27:01,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658801246] [2024-09-25 10:27:01,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:01,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 10:27:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 10:27:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:27:01,440 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:05,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-25 10:27:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:06,482 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2024-09-25 10:27:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-25 10:27:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-25 10:27:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:06,483 INFO L225 Difference]: With dead ends: 92 [2024-09-25 10:27:06,483 INFO L226 Difference]: Without dead ends: 69 [2024-09-25 10:27:06,484 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:27:06,485 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:06,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 156 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 383 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-09-25 10:27:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-25 10:27:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2024-09-25 10:27:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2024-09-25 10:27:06,504 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 19 [2024-09-25 10:27:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:06,505 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2024-09-25 10:27:06,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:06,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2024-09-25 10:27:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-25 10:27:06,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:06,506 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:06,520 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:06,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-25 10:27:06,707 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:06,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash 374216051, now seen corresponding path program 4 times [2024-09-25 10:27:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:06,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703468438] [2024-09-25 10:27:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:06,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:06,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:06,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703468438] [2024-09-25 10:27:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703468438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985126735] [2024-09-25 10:27:06,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:06,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:06,798 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) [2024-09-25 10:27:06,799 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:27:06,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:06,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:06,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:27:06,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:06,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:27:06,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985126735] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:06,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:06,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2024-09-25 10:27:06,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911945502] [2024-09-25 10:27:06,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:06,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 10:27:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 10:27:06,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:27:06,979 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:07,169 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2024-09-25 10:27:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:27:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-25 10:27:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:07,170 INFO L225 Difference]: With dead ends: 82 [2024-09-25 10:27:07,170 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 10:27:07,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:27:07,170 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:07,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 10:27:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2024-09-25 10:27:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2024-09-25 10:27:07,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 21 [2024-09-25 10:27:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:07,185 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2024-09-25 10:27:07,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:07,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2024-09-25 10:27:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-25 10:27:07,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:07,187 INFO L216 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:07,200 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 10:27:07,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:07,391 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:07,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1067065486, now seen corresponding path program 5 times [2024-09-25 10:27:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:07,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502302500] [2024-09-25 10:27:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:07,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502302500] [2024-09-25 10:27:07,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502302500] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048881636] [2024-09-25 10:27:07,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:07,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:07,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:07,498 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) [2024-09-25 10:27:07,499 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:27:07,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-25 10:27:07,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:07,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 10:27:07,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:07,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:07,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048881636] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:07,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:07,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-25 10:27:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536615052] [2024-09-25 10:27:07,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:07,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:27:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:27:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:27:07,697 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:09,374 INFO L93 Difference]: Finished difference Result 152 states and 221 transitions. [2024-09-25 10:27:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-09-25 10:27:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-25 10:27:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:09,376 INFO L225 Difference]: With dead ends: 152 [2024-09-25 10:27:09,376 INFO L226 Difference]: Without dead ends: 142 [2024-09-25 10:27:09,378 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1353, Invalid=3617, Unknown=0, NotChecked=0, Total=4970 [2024-09-25 10:27:09,378 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:09,378 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 175 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:27:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-25 10:27:09,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 75. [2024-09-25 10:27:09,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2024-09-25 10:27:09,398 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 21 [2024-09-25 10:27:09,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:09,398 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2024-09-25 10:27:09,398 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:09,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2024-09-25 10:27:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-25 10:27:09,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:09,399 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:09,412 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 10:27:09,599 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:09,600 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:09,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash 380377990, now seen corresponding path program 6 times [2024-09-25 10:27:09,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:09,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458257756] [2024-09-25 10:27:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:09,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:09,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:09,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:09,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458257756] [2024-09-25 10:27:09,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458257756] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:09,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567317776] [2024-09-25 10:27:09,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:09,933 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) [2024-09-25 10:27:09,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:27:09,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-25 10:27:09,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:09,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-25 10:27:09,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:10,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567317776] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:10,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:10,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2024-09-25 10:27:10,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56776684] [2024-09-25 10:27:10,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:10,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-25 10:27:10,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-25 10:27:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-25 10:27:10,556 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:14,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-25 10:27:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:16,105 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2024-09-25 10:27:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:27:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-25 10:27:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:16,106 INFO L225 Difference]: With dead ends: 128 [2024-09-25 10:27:16,106 INFO L226 Difference]: Without dead ends: 100 [2024-09-25 10:27:16,106 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=316, Invalid=2234, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:27:16,107 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:16,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 126 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 347 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-09-25 10:27:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-25 10:27:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2024-09-25 10:27:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 69 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2024-09-25 10:27:16,136 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 22 [2024-09-25 10:27:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:16,137 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2024-09-25 10:27:16,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:16,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2024-09-25 10:27:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 10:27:16,137 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:16,138 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:16,150 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 10:27:16,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:16,338 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:16,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash -652374634, now seen corresponding path program 7 times [2024-09-25 10:27:16,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:16,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221873243] [2024-09-25 10:27:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:16,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:16,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221873243] [2024-09-25 10:27:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221873243] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003984205] [2024-09-25 10:27:16,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:16,435 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) [2024-09-25 10:27:16,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:27:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:16,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:27:16,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:16,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 10:27:16,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003984205] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:16,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:16,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2024-09-25 10:27:16,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246816619] [2024-09-25 10:27:16,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:16,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:27:16,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:27:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:27:16,664 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:16,948 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2024-09-25 10:27:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 10:27:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-25 10:27:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:16,949 INFO L225 Difference]: With dead ends: 117 [2024-09-25 10:27:16,949 INFO L226 Difference]: Without dead ends: 98 [2024-09-25 10:27:16,949 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:27:16,950 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:16,950 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 118 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-25 10:27:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2024-09-25 10:27:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2024-09-25 10:27:16,975 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 24 [2024-09-25 10:27:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:16,975 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2024-09-25 10:27:16,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:16,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2024-09-25 10:27:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 10:27:16,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:16,976 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:16,988 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 10:27:17,176 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-25 10:27:17,177 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:17,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:17,177 INFO L85 PathProgramCache]: Analyzing trace with hash 247533441, now seen corresponding path program 8 times [2024-09-25 10:27:17,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:17,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848563134] [2024-09-25 10:27:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:17,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:17,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848563134] [2024-09-25 10:27:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848563134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381840179] [2024-09-25 10:27:17,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:17,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:17,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:17,574 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) [2024-09-25 10:27:17,575 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:27:17,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:17,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-25 10:27:17,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:17,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:18,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381840179] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:18,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:18,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 41 [2024-09-25 10:27:18,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355912098] [2024-09-25 10:27:18,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:18,386 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 10:27:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 10:27:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:27:18,387 INFO L87 Difference]: Start difference. First operand 81 states and 109 transitions. Second operand has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:22,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-25 10:27:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:24,551 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2024-09-25 10:27:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-25 10:27:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-25 10:27:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:24,552 INFO L225 Difference]: With dead ends: 138 [2024-09-25 10:27:24,552 INFO L226 Difference]: Without dead ends: 103 [2024-09-25 10:27:24,553 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=438, Invalid=3468, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:27:24,553 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:24,554 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 224 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 706 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-09-25 10:27:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-25 10:27:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2024-09-25 10:27:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2024-09-25 10:27:24,578 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 25 [2024-09-25 10:27:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:24,578 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2024-09-25 10:27:24,578 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:24,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2024-09-25 10:27:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-25 10:27:24,578 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:24,579 INFO L216 NwaCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:24,591 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:24,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 10:27:24,779 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:24,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:24,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1123125963, now seen corresponding path program 9 times [2024-09-25 10:27:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:24,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527331978] [2024-09-25 10:27:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:24,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:27:24,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527331978] [2024-09-25 10:27:24,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527331978] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435919341] [2024-09-25 10:27:24,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:24,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:24,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:24,948 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) [2024-09-25 10:27:24,950 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:27:24,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:27:24,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:24,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:27:24,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-25 10:27:25,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-25 10:27:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435919341] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:25,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:25,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 24 [2024-09-25 10:27:25,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449201819] [2024-09-25 10:27:25,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:25,215 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 10:27:25,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 10:27:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:27:25,216 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:25,869 INFO L93 Difference]: Finished difference Result 126 states and 170 transitions. [2024-09-25 10:27:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-25 10:27:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-25 10:27:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:25,870 INFO L225 Difference]: With dead ends: 126 [2024-09-25 10:27:25,871 INFO L226 Difference]: Without dead ends: 112 [2024-09-25 10:27:25,871 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=428, Invalid=1828, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:27:25,871 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:25,872 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 155 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:27:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-25 10:27:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2024-09-25 10:27:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 77 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2024-09-25 10:27:25,914 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 26 [2024-09-25 10:27:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:25,914 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2024-09-25 10:27:25,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:25,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2024-09-25 10:27:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-25 10:27:25,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:25,915 INFO L216 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:25,927 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 10:27:26,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 10:27:26,115 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:26,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1699490485, now seen corresponding path program 3 times [2024-09-25 10:27:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:26,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271395729] [2024-09-25 10:27:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:26,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:26,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:26,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271395729] [2024-09-25 10:27:26,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271395729] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522936318] [2024-09-25 10:27:26,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:26,306 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) [2024-09-25 10:27:26,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:27:26,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-25 10:27:26,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:26,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 10:27:26,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:26,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:26,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522936318] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:26,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:26,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-25 10:27:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556342863] [2024-09-25 10:27:26,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:26,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 10:27:26,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:26,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 10:27:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:27:26,726 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:32,100 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2024-09-25 10:27:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-25 10:27:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-25 10:27:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:32,102 INFO L225 Difference]: With dead ends: 397 [2024-09-25 10:27:32,102 INFO L226 Difference]: Without dead ends: 369 [2024-09-25 10:27:32,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2044, Invalid=4598, Unknown=0, NotChecked=0, Total=6642 [2024-09-25 10:27:32,104 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 819 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:32,104 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 456 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-25 10:27:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-09-25 10:27:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 121. [2024-09-25 10:27:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2024-09-25 10:27:32,170 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 26 [2024-09-25 10:27:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:32,170 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2024-09-25 10:27:32,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:32,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:32,171 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2024-09-25 10:27:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 10:27:32,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:32,171 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:32,184 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:32,371 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 10:27:32,372 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:32,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash -581854573, now seen corresponding path program 10 times [2024-09-25 10:27:32,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:32,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022806522] [2024-09-25 10:27:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:32,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:32,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:27:32,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022806522] [2024-09-25 10:27:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022806522] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275033935] [2024-09-25 10:27:32,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:32,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:32,514 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) [2024-09-25 10:27:32,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:27:32,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:32,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:27:32,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:27:32,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:27:32,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275033935] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:32,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:32,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2024-09-25 10:27:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583322970] [2024-09-25 10:27:32,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:32,850 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 10:27:32,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:32,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 10:27:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:27:32,851 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:33,350 INFO L93 Difference]: Finished difference Result 207 states and 262 transitions. [2024-09-25 10:27:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:27:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-25 10:27:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:33,351 INFO L225 Difference]: With dead ends: 207 [2024-09-25 10:27:33,351 INFO L226 Difference]: Without dead ends: 157 [2024-09-25 10:27:33,352 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:27:33,352 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:33,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-25 10:27:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 135. [2024-09-25 10:27:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.323076923076923) internal successors, (172), 130 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2024-09-25 10:27:33,412 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 27 [2024-09-25 10:27:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:33,413 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2024-09-25 10:27:33,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:33,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2024-09-25 10:27:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-25 10:27:33,413 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:33,413 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:33,426 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:33,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 10:27:33,614 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:33,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1321611814, now seen corresponding path program 11 times [2024-09-25 10:27:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:33,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410662998] [2024-09-25 10:27:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:34,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:34,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:34,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410662998] [2024-09-25 10:27:34,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410662998] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:34,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551597892] [2024-09-25 10:27:34,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:34,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:34,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:34,152 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:34,154 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 10:27:34,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-25 10:27:34,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:34,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-25 10:27:34,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:34,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:27:35,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551597892] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:35,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:35,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 47 [2024-09-25 10:27:35,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516268536] [2024-09-25 10:27:35,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:35,465 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:27:35,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:27:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:27:35,466 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 45 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:39,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-25 10:27:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:42,441 INFO L93 Difference]: Finished difference Result 209 states and 255 transitions. [2024-09-25 10:27:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-25 10:27:42,442 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 45 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-25 10:27:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:42,443 INFO L225 Difference]: With dead ends: 209 [2024-09-25 10:27:42,443 INFO L226 Difference]: Without dead ends: 177 [2024-09-25 10:27:42,444 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=524, Invalid=4306, Unknown=0, NotChecked=0, Total=4830 [2024-09-25 10:27:42,444 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:42,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 167 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 642 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-25 10:27:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-25 10:27:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 123. [2024-09-25 10:27:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 118 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2024-09-25 10:27:42,507 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 28 [2024-09-25 10:27:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:42,507 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2024-09-25 10:27:42,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 45 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:42,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2024-09-25 10:27:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 10:27:42,508 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:42,508 INFO L216 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:42,521 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 10:27:42,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-25 10:27:42,709 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:42,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1915414158, now seen corresponding path program 12 times [2024-09-25 10:27:42,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:42,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717160422] [2024-09-25 10:27:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:42,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:42,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:42,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:42,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717160422] [2024-09-25 10:27:42,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717160422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:42,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392248907] [2024-09-25 10:27:42,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:42,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:42,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:42,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:42,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 10:27:43,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-25 10:27:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:43,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-25 10:27:43,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:43,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:27:43,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392248907] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:43,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:43,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-25 10:27:43,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814601000] [2024-09-25 10:27:43,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:43,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 10:27:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:43,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 10:27:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:27:43,505 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:57,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:57,594 INFO L93 Difference]: Finished difference Result 454 states and 600 transitions. [2024-09-25 10:27:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-09-25 10:27:57,595 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-25 10:27:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:57,596 INFO L225 Difference]: With dead ends: 454 [2024-09-25 10:27:57,597 INFO L226 Difference]: Without dead ends: 436 [2024-09-25 10:27:57,600 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8327 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=6168, Invalid=16182, Unknown=0, NotChecked=0, Total=22350 [2024-09-25 10:27:57,600 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 1175 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:57,601 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 463 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-25 10:27:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-09-25 10:27:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 136. [2024-09-25 10:27:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.3282442748091603) internal successors, (174), 131 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2024-09-25 10:27:57,687 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 29 [2024-09-25 10:27:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:57,687 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2024-09-25 10:27:57,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:57,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2024-09-25 10:27:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 10:27:57,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:57,688 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:57,701 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:57,892 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 10:27:57,893 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:57,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2031107082, now seen corresponding path program 13 times [2024-09-25 10:27:57,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:57,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426472344] [2024-09-25 10:27:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:57,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:58,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:58,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:58,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426472344] [2024-09-25 10:27:58,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426472344] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:58,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654317059] [2024-09-25 10:27:58,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:58,053 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:58,054 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 10:27:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:58,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-25 10:27:58,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:58,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 10:27:58,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654317059] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:58,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2024-09-25 10:27:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006409750] [2024-09-25 10:27:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:58,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 10:27:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:58,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 10:27:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:27:58,512 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:59,203 INFO L93 Difference]: Finished difference Result 240 states and 301 transitions. [2024-09-25 10:27:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-25 10:27:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-25 10:27:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:59,204 INFO L225 Difference]: With dead ends: 240 [2024-09-25 10:27:59,204 INFO L226 Difference]: Without dead ends: 177 [2024-09-25 10:27:59,204 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:27:59,205 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:59,205 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 127 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-25 10:27:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 152. [2024-09-25 10:27:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.3061224489795917) internal successors, (192), 147 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 196 transitions. [2024-09-25 10:27:59,292 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 196 transitions. Word has length 30 [2024-09-25 10:27:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:59,292 INFO L474 AbstractCegarLoop]: Abstraction has 152 states and 196 transitions. [2024-09-25 10:27:59,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:27:59,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 196 transitions. [2024-09-25 10:27:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 10:27:59,293 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:59,293 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:59,305 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:59,493 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:59,494 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:59,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash -769153695, now seen corresponding path program 14 times [2024-09-25 10:27:59,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:59,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451037845] [2024-09-25 10:27:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:00,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:28:00,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451037845] [2024-09-25 10:28:00,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451037845] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154763909] [2024-09-25 10:28:00,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:28:00,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:00,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:00,127 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:00,128 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 10:28:00,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:28:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:00,191 WARN L260 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-25 10:28:00,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:28:00,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:28:01,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154763909] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:01,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:01,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 20] total 48 [2024-09-25 10:28:01,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284605011] [2024-09-25 10:28:01,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:01,698 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 10:28:01,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:01,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 10:28:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:28:01,699 INFO L87 Difference]: Start difference. First operand 152 states and 196 transitions. Second operand has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 46 states have internal predecessors, (65), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:05,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-25 10:28:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:11,570 INFO L93 Difference]: Finished difference Result 250 states and 300 transitions. [2024-09-25 10:28:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-25 10:28:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 46 states have internal predecessors, (65), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-25 10:28:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:11,571 INFO L225 Difference]: With dead ends: 250 [2024-09-25 10:28:11,571 INFO L226 Difference]: Without dead ends: 214 [2024-09-25 10:28:11,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=662, Invalid=5190, Unknown=0, NotChecked=0, Total=5852 [2024-09-25 10:28:11,572 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:11,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 162 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 796 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-25 10:28:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-25 10:28:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 138. [2024-09-25 10:28:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.3157894736842106) internal successors, (175), 133 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2024-09-25 10:28:11,659 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 31 [2024-09-25 10:28:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:11,659 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2024-09-25 10:28:11,659 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 46 states have internal predecessors, (65), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:11,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2024-09-25 10:28:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:28:11,660 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:11,660 INFO L216 NwaCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-25 10:28:11,860 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:11,860 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:11,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 520374677, now seen corresponding path program 15 times [2024-09-25 10:28:11,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:11,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962687976] [2024-09-25 10:28:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:11,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:12,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:28:12,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:12,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962687976] [2024-09-25 10:28:12,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962687976] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:12,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262799152] [2024-09-25 10:28:12,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:28:12,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:12,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:12,123 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:12,124 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 10:28:12,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-25 10:28:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:12,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-25 10:28:12,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:28:12,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 10:28:12,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262799152] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:12,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:12,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-25 10:28:12,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142237925] [2024-09-25 10:28:12,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:12,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 10:28:12,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 10:28:12,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:28:12,736 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:39,540 INFO L93 Difference]: Finished difference Result 547 states and 705 transitions. [2024-09-25 10:28:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2024-09-25 10:28:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-25 10:28:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:39,543 INFO L225 Difference]: With dead ends: 547 [2024-09-25 10:28:39,543 INFO L226 Difference]: Without dead ends: 532 [2024-09-25 10:28:39,545 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17341 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=10628, Invalid=33262, Unknown=0, NotChecked=0, Total=43890 [2024-09-25 10:28:39,545 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 1583 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:39,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 523 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-25 10:28:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-09-25 10:28:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 153. [2024-09-25 10:28:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.3175675675675675) internal successors, (195), 148 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2024-09-25 10:28:39,658 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 32 [2024-09-25 10:28:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:39,658 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2024-09-25 10:28:39,659 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:39,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2024-09-25 10:28:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:28:39,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:39,659 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:39,671 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-25 10:28:39,859 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-25 10:28:39,860 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:39,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1853204403, now seen corresponding path program 16 times [2024-09-25 10:28:39,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:39,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649322665] [2024-09-25 10:28:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:39,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:40,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:28:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:40,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649322665] [2024-09-25 10:28:40,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649322665] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:40,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192663732] [2024-09-25 10:28:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:28:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:40,052 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:40,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 10:28:40,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:28:40,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:40,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-25 10:28:40,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:28:40,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:28:40,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192663732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:40,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:40,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 38 [2024-09-25 10:28:40,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131911591] [2024-09-25 10:28:40,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:40,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 10:28:40,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 10:28:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:28:40,518 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:41,442 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2024-09-25 10:28:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-25 10:28:41,443 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-25 10:28:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:41,444 INFO L225 Difference]: With dead ends: 269 [2024-09-25 10:28:41,444 INFO L226 Difference]: Without dead ends: 198 [2024-09-25 10:28:41,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:28:41,445 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:41,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 190 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:28:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-09-25 10:28:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 170. [2024-09-25 10:28:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2969696969696969) internal successors, (214), 165 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 218 transitions. [2024-09-25 10:28:41,586 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 218 transitions. Word has length 33 [2024-09-25 10:28:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:41,586 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 218 transitions. [2024-09-25 10:28:41,587 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:41,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 218 transitions. [2024-09-25 10:28:41,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 10:28:41,587 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:41,587 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:41,608 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 10:28:41,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-25 10:28:41,788 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:41,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 158453958, now seen corresponding path program 17 times [2024-09-25 10:28:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:41,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506369962] [2024-09-25 10:28:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:42,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:28:42,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506369962] [2024-09-25 10:28:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506369962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005436079] [2024-09-25 10:28:42,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:28:42,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:42,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:42,497 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 10:28:42,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-25 10:28:42,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:42,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-25 10:28:42,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:28:43,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:28:44,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005436079] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:28:44,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:28:44,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 28] total 63 [2024-09-25 10:28:44,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838721980] [2024-09-25 10:28:44,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:44,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-25 10:28:44,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-25 10:28:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:28:44,785 INFO L87 Difference]: Start difference. First operand 170 states and 218 transitions. Second operand has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:49,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-25 10:28:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:55,938 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2024-09-25 10:28:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-25 10:28:55,939 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-25 10:28:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:55,940 INFO L225 Difference]: With dead ends: 280 [2024-09-25 10:28:55,940 INFO L226 Difference]: Without dead ends: 240 [2024-09-25 10:28:55,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=787, Invalid=7585, Unknown=0, NotChecked=0, Total=8372 [2024-09-25 10:28:55,941 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:55,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 221 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1051 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-09-25 10:28:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-09-25 10:28:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2024-09-25 10:28:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.308724832214765) internal successors, (195), 149 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2024-09-25 10:28:56,055 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 34 [2024-09-25 10:28:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:56,056 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2024-09-25 10:28:56,056 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:28:56,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2024-09-25 10:28:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 10:28:56,056 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:56,056 INFO L216 NwaCegarLoop]: trace histogram [16, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:56,070 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-25 10:28:56,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-25 10:28:56,257 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash -731705582, now seen corresponding path program 18 times [2024-09-25 10:28:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:56,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582177031] [2024-09-25 10:28:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:56,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:56,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 10:28:56,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582177031] [2024-09-25 10:28:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582177031] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814283697] [2024-09-25 10:28:56,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:28:56,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:56,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:56,537 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:56,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process