./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:52:34,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:52:34,332 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:52:34,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:52:34,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:52:34,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:52:34,361 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:52:34,361 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:52:34,362 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:52:34,365 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:52:34,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:52:34,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:52:34,379 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:52:34,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:52:34,380 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:52:34,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:52:34,380 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:52:34,380 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:52:34,381 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:52:34,381 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:52:34,381 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:52:34,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:52:34,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:52:34,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:52:34,385 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:52:34,385 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:52:34,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:52:34,385 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:52:34,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:52:34,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:52:34,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:52:34,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:52:34,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:52:34,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:52:34,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:52:34,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:52:34,386 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:52:34,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:52:34,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:52:34,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:52:34,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:52:34,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:52:34,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:52:34,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:52:34,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:52:34,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:52:34,616 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:52:34,616 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:52:34,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-18 15:52:35,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:52:36,034 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:52:36,034 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-18 15:52:36,040 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4be5f2043/d4220847e1d64f218f5674fa81f745de/FLAG77711e51d [2024-09-18 15:52:36,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4be5f2043/d4220847e1d64f218f5674fa81f745de [2024-09-18 15:52:36,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:52:36,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:52:36,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:52:36,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:52:36,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:52:36,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9872ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36, skipping insertion in model container [2024-09-18 15:52:36,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,477 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:52:36,611 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/nla-digbench/egcd3-ll.c[490,503] [2024-09-18 15:52:36,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:52:36,649 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:52:36,659 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/nla-digbench/egcd3-ll.c[490,503] [2024-09-18 15:52:36,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:52:36,701 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:52:36,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36 WrapperNode [2024-09-18 15:52:36,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:52:36,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:52:36,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:52:36,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:52:36,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,715 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,721 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:52:36,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:52:36,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:52:36,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:52:36,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:52:36,735 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,740 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,762 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]. [2024-09-18 15:52:36,762 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,779 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:52:36,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:52:36,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:52:36,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:52:36,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (1/1) ... [2024-09-18 15:52:36,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:52:36,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:36,814 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) [2024-09-18 15:52:36,816 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 [2024-09-18 15:52:36,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:52:36,860 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 15:52:36,860 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 15:52:36,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:52:36,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:52:36,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:52:36,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:52:36,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:52:36,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:52:36,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:52:36,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:52:36,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:52:36,910 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:52:36,912 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:52:37,042 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 15:52:37,042 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:52:37,057 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:52:37,057 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-18 15:52:37,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:52:37 BoogieIcfgContainer [2024-09-18 15:52:37,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:52:37,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:52:37,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:52:37,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:52:37,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:52:36" (1/3) ... [2024-09-18 15:52:37,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba3ec58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:52:37, skipping insertion in model container [2024-09-18 15:52:37,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:36" (2/3) ... [2024-09-18 15:52:37,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba3ec58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:52:37, skipping insertion in model container [2024-09-18 15:52:37,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:52:37" (3/3) ... [2024-09-18 15:52:37,063 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2024-09-18 15:52:37,076 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:52:37,076 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:52:37,132 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:52:37,138 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;@7ff7b37d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:52:37,139 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:52:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 15:52:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 15:52:37,152 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:37,153 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:37,154 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:37,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 48210315, now seen corresponding path program 1 times [2024-09-18 15:52:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:37,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505339732] [2024-09-18 15:52:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:37,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:37,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505339732] [2024-09-18 15:52:37,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505339732] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:37,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:37,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:52:37,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784612067] [2024-09-18 15:52:37,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:37,330 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:52:37,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:52:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:52:37,352 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:37,377 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2024-09-18 15:52:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:52:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-18 15:52:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:37,389 INFO L225 Difference]: With dead ends: 64 [2024-09-18 15:52:37,390 INFO L226 Difference]: Without dead ends: 31 [2024-09-18 15:52:37,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:52:37,395 INFO L434 NwaCegarLoop]: 40 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, 40 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 [2024-09-18 15:52:37,396 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-18 15:52:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-18 15:52:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:52:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-09-18 15:52:37,431 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 21 [2024-09-18 15:52:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:37,432 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-09-18 15:52:37,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:37,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-09-18 15:52:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-18 15:52:37,434 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:37,434 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:37,435 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:52:37,435 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:37,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash -190498723, now seen corresponding path program 1 times [2024-09-18 15:52:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:37,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159075221] [2024-09-18 15:52:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:52:37,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159075221] [2024-09-18 15:52:37,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159075221] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:37,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:37,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:52:37,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678090769] [2024-09-18 15:52:37,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:37,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:52:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:52:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:37,644 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:37,746 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2024-09-18 15:52:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:52:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-18 15:52:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:37,748 INFO L225 Difference]: With dead ends: 50 [2024-09-18 15:52:37,749 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 15:52:37,749 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:52:37,751 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:37,751 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 124 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 15:52:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-09-18 15:52:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:52:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-18 15:52:37,766 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-09-18 15:52:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:37,767 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-18 15:52:37,767 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:37,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-18 15:52:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-18 15:52:37,769 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:37,769 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:37,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:52:37,770 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:37,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash -832406041, now seen corresponding path program 1 times [2024-09-18 15:52:37,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:37,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525942574] [2024-09-18 15:52:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:37,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748067375] [2024-09-18 15:52:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:37,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:37,818 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) [2024-09-18 15:52:37,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:52:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:52:37,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:38,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:38,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525942574] [2024-09-18 15:52:38,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748067375] [2024-09-18 15:52:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748067375] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:38,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:38,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803561999] [2024-09-18 15:52:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:38,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:38,018 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:38,071 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-18 15:52:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:38,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-18 15:52:38,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:38,073 INFO L225 Difference]: With dead ends: 49 [2024-09-18 15:52:38,073 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 15:52:38,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:38,074 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:38,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 15:52:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-18 15:52:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-18 15:52:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-18 15:52:38,083 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2024-09-18 15:52:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:38,083 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-18 15:52:38,083 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:38,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-18 15:52:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 15:52:38,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:38,086 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:38,111 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:52:38,286 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:38,287 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:38,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash -143490539, now seen corresponding path program 1 times [2024-09-18 15:52:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:38,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144764867] [2024-09-18 15:52:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:52:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144764867] [2024-09-18 15:52:38,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144764867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020638652] [2024-09-18 15:52:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:38,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:38,524 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) [2024-09-18 15:52:38,526 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:52:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:52:38,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:52:38,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:52:38,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020638652] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:38,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:38,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-18 15:52:38,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142214037] [2024-09-18 15:52:38,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:38,685 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:52:38,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:38,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:52:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:52:38,686 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:38,863 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2024-09-18 15:52:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:52:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-18 15:52:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:38,865 INFO L225 Difference]: With dead ends: 99 [2024-09-18 15:52:38,866 INFO L226 Difference]: Without dead ends: 92 [2024-09-18 15:52:38,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:52:38,867 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:38,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 267 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-18 15:52:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-09-18 15:52:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 15:52:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2024-09-18 15:52:38,890 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 27 [2024-09-18 15:52:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:38,890 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2024-09-18 15:52:38,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:38,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2024-09-18 15:52:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 15:52:38,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:38,891 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:38,905 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:39,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:39,093 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:39,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -849404633, now seen corresponding path program 1 times [2024-09-18 15:52:39,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:39,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120859242] [2024-09-18 15:52:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:39,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618913628] [2024-09-18 15:52:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:39,115 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) [2024-09-18 15:52:39,116 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:52:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:52:39,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:39,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:39,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120859242] [2024-09-18 15:52:39,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618913628] [2024-09-18 15:52:39,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618913628] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:39,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:39,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:39,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219242414] [2024-09-18 15:52:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:39,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:39,263 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:52:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:39,308 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-09-18 15:52:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-18 15:52:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:39,309 INFO L225 Difference]: With dead ends: 75 [2024-09-18 15:52:39,309 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 15:52:39,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:39,310 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:39,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 15:52:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-18 15:52:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 15:52:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-09-18 15:52:39,336 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 30 [2024-09-18 15:52:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:39,337 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-09-18 15:52:39,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:52:39,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,337 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-09-18 15:52:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 15:52:39,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:39,338 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:39,350 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:52:39,538 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:39,538 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:39,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash -570934993, now seen corresponding path program 1 times [2024-09-18 15:52:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:39,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139332930] [2024-09-18 15:52:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:39,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079253939] [2024-09-18 15:52:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:39,550 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) [2024-09-18 15:52:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:52:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 15:52:39,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:39,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:39,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139332930] [2024-09-18 15:52:39,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079253939] [2024-09-18 15:52:39,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079253939] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:39,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:52:39,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-09-18 15:52:39,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143941671] [2024-09-18 15:52:39,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:39,724 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:52:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:52:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:52:39,725 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:39,869 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2024-09-18 15:52:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:52:39,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-09-18 15:52:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:39,872 INFO L225 Difference]: With dead ends: 107 [2024-09-18 15:52:39,873 INFO L226 Difference]: Without dead ends: 105 [2024-09-18 15:52:39,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:52:39,874 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:39,874 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 243 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-18 15:52:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-09-18 15:52:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-18 15:52:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-18 15:52:39,900 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 30 [2024-09-18 15:52:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:39,900 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-18 15:52:39,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:39,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-18 15:52:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:52:39,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:39,902 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:39,916 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:40,103 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:40,104 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:40,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1950278233, now seen corresponding path program 1 times [2024-09-18 15:52:40,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:40,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094153336] [2024-09-18 15:52:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:40,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:40,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860010506] [2024-09-18 15:52:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:40,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:40,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:40,127 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) [2024-09-18 15:52:40,129 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:52:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:40,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:52:40,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-18 15:52:40,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:40,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:40,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094153336] [2024-09-18 15:52:40,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:40,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860010506] [2024-09-18 15:52:40,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860010506] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:40,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:40,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:40,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426371399] [2024-09-18 15:52:40,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:40,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:40,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:40,228 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:52:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:40,297 INFO L93 Difference]: Finished difference Result 147 states and 207 transitions. [2024-09-18 15:52:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:40,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2024-09-18 15:52:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:40,299 INFO L225 Difference]: With dead ends: 147 [2024-09-18 15:52:40,299 INFO L226 Difference]: Without dead ends: 145 [2024-09-18 15:52:40,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:40,300 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:40,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-18 15:52:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-09-18 15:52:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-18 15:52:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 199 transitions. [2024-09-18 15:52:40,337 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 199 transitions. Word has length 35 [2024-09-18 15:52:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:40,337 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 199 transitions. [2024-09-18 15:52:40,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:52:40,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 199 transitions. [2024-09-18 15:52:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:52:40,339 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:40,339 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:40,352 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:40,539 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 15:52:40,540 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:40,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:40,540 INFO L85 PathProgramCache]: Analyzing trace with hash -939315489, now seen corresponding path program 1 times [2024-09-18 15:52:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378447237] [2024-09-18 15:52:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:40,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:40,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905959257] [2024-09-18 15:52:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:40,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:40,559 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) [2024-09-18 15:52:40,560 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:52:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:40,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 15:52:40,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:40,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:40,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:40,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378447237] [2024-09-18 15:52:40,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:40,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905959257] [2024-09-18 15:52:40,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905959257] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:40,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:40,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-18 15:52:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827360721] [2024-09-18 15:52:40,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:40,751 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:52:40,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:52:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:52:40,752 INFO L87 Difference]: Start difference. First operand 139 states and 199 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:52:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:40,895 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2024-09-18 15:52:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:52:40,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-09-18 15:52:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:40,898 INFO L225 Difference]: With dead ends: 152 [2024-09-18 15:52:40,898 INFO L226 Difference]: Without dead ends: 150 [2024-09-18 15:52:40,898 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:52:40,899 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:40,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 191 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-18 15:52:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-09-18 15:52:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 93 states have internal predecessors, (117), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-18 15:52:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 205 transitions. [2024-09-18 15:52:40,934 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 205 transitions. Word has length 35 [2024-09-18 15:52:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:40,935 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 205 transitions. [2024-09-18 15:52:40,935 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:52:40,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 205 transitions. [2024-09-18 15:52:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:52:40,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:40,940 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:40,967 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:52:41,140 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:41,141 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:41,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:41,141 INFO L85 PathProgramCache]: Analyzing trace with hash -660845849, now seen corresponding path program 2 times [2024-09-18 15:52:41,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:41,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833848769] [2024-09-18 15:52:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:41,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:41,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:41,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:52:41,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:41,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833848769] [2024-09-18 15:52:41,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833848769] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:41,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:41,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:41,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749969511] [2024-09-18 15:52:41,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:41,209 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:41,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:41,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:41,210 INFO L87 Difference]: Start difference. First operand 147 states and 205 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:41,303 INFO L93 Difference]: Finished difference Result 186 states and 257 transitions. [2024-09-18 15:52:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:52:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-18 15:52:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:41,305 INFO L225 Difference]: With dead ends: 186 [2024-09-18 15:52:41,305 INFO L226 Difference]: Without dead ends: 130 [2024-09-18 15:52:41,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:52:41,306 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:41,306 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-18 15:52:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-09-18 15:52:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 37 states have call successors, (37), 10 states have call predecessors, (37), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-18 15:52:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2024-09-18 15:52:41,328 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 35 [2024-09-18 15:52:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:41,328 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2024-09-18 15:52:41,328 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:52:41,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2024-09-18 15:52:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-18 15:52:41,329 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:41,329 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:41,329 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-18 15:52:41,330 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:41,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1428718823, now seen corresponding path program 1 times [2024-09-18 15:52:41,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:41,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953673933] [2024-09-18 15:52:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:41,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117155310] [2024-09-18 15:52:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:41,342 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) [2024-09-18 15:52:41,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:52:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:41,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:52:41,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:52:41,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:41,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:41,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953673933] [2024-09-18 15:52:41,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:41,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117155310] [2024-09-18 15:52:41,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117155310] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:41,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:41,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:41,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291680573] [2024-09-18 15:52:41,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:41,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:41,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:41,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:41,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:41,429 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 15:52:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:41,485 INFO L93 Difference]: Finished difference Result 180 states and 260 transitions. [2024-09-18 15:52:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:41,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2024-09-18 15:52:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:41,486 INFO L225 Difference]: With dead ends: 180 [2024-09-18 15:52:41,487 INFO L226 Difference]: Without dead ends: 178 [2024-09-18 15:52:41,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:41,487 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:41,487 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-18 15:52:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-09-18 15:52:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-18 15:52:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2024-09-18 15:52:41,513 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 40 [2024-09-18 15:52:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:41,513 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2024-09-18 15:52:41,513 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 15:52:41,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2024-09-18 15:52:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-18 15:52:41,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:41,514 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:41,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:52:41,714 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 [2024-09-18 15:52:41,714 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:41,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash -262492089, now seen corresponding path program 1 times [2024-09-18 15:52:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129702635] [2024-09-18 15:52:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:41,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773604433] [2024-09-18 15:52:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:41,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:41,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:41,728 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) [2024-09-18 15:52:41,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:52:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:41,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-18 15:52:41,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-18 15:52:42,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 15:52:43,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:43,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129702635] [2024-09-18 15:52:43,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:43,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773604433] [2024-09-18 15:52:43,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773604433] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:43,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:52:43,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-18 15:52:43,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255856004] [2024-09-18 15:52:43,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:43,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 15:52:43,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:43,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 15:52:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:52:43,649 INFO L87 Difference]: Start difference. First operand 166 states and 238 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-18 15:52:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:46,843 INFO L93 Difference]: Finished difference Result 445 states and 663 transitions. [2024-09-18 15:52:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-18 15:52:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 52 [2024-09-18 15:52:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:46,847 INFO L225 Difference]: With dead ends: 445 [2024-09-18 15:52:46,847 INFO L226 Difference]: Without dead ends: 342 [2024-09-18 15:52:46,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-09-18 15:52:46,849 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 170 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:46,849 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 408 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-18 15:52:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-18 15:52:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-09-18 15:52:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 156 states have internal predecessors, (180), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-18 15:52:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 364 transitions. [2024-09-18 15:52:46,928 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 364 transitions. Word has length 52 [2024-09-18 15:52:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:46,929 INFO L474 AbstractCegarLoop]: Abstraction has 256 states and 364 transitions. [2024-09-18 15:52:46,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-18 15:52:46,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 364 transitions. [2024-09-18 15:52:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 15:52:46,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:46,939 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:46,951 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:47,139 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 [2024-09-18 15:52:47,139 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:47,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1924337224, now seen corresponding path program 1 times [2024-09-18 15:52:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118162158] [2024-09-18 15:52:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:47,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848481927] [2024-09-18 15:52:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:47,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:47,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:47,161 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) [2024-09-18 15:52:47,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:52:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:47,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:52:47,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-09-18 15:52:47,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-18 15:52:47,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:47,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118162158] [2024-09-18 15:52:47,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:47,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848481927] [2024-09-18 15:52:47,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848481927] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:47,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:47,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-18 15:52:47,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472958103] [2024-09-18 15:52:47,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:47,309 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:47,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:47,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:52:47,309 INFO L87 Difference]: Start difference. First operand 256 states and 364 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 15:52:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:47,417 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2024-09-18 15:52:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:47,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2024-09-18 15:52:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:47,420 INFO L225 Difference]: With dead ends: 262 [2024-09-18 15:52:47,420 INFO L226 Difference]: Without dead ends: 260 [2024-09-18 15:52:47,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:52:47,420 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:47,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-18 15:52:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-09-18 15:52:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 159 states have internal predecessors, (183), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-18 15:52:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 367 transitions. [2024-09-18 15:52:47,510 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 367 transitions. Word has length 62 [2024-09-18 15:52:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:47,511 INFO L474 AbstractCegarLoop]: Abstraction has 260 states and 367 transitions. [2024-09-18 15:52:47,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 15:52:47,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 367 transitions. [2024-09-18 15:52:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-18 15:52:47,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:47,512 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:47,524 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:47,712 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 [2024-09-18 15:52:47,713 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:47,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:47,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1180380411, now seen corresponding path program 1 times [2024-09-18 15:52:47,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:47,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143158160] [2024-09-18 15:52:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:47,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:47,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803084267] [2024-09-18 15:52:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:47,729 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) [2024-09-18 15:52:47,730 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:52:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:47,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-18 15:52:47,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-18 15:52:48,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143158160] [2024-09-18 15:52:48,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803084267] [2024-09-18 15:52:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803084267] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:48,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-18 15:52:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846465801] [2024-09-18 15:52:48,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:48,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:52:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:52:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:52:48,198 INFO L87 Difference]: Start difference. First operand 260 states and 367 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 15:52:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:48,813 INFO L93 Difference]: Finished difference Result 318 states and 454 transitions. [2024-09-18 15:52:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:52:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-09-18 15:52:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:48,817 INFO L225 Difference]: With dead ends: 318 [2024-09-18 15:52:48,817 INFO L226 Difference]: Without dead ends: 316 [2024-09-18 15:52:48,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-09-18 15:52:48,817 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:48,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 443 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-18 15:52:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2024-09-18 15:52:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 178 states have (on average 1.2078651685393258) internal successors, (215), 188 states have internal predecessors, (215), 117 states have call successors, (117), 16 states have call predecessors, (117), 15 states have return successors, (115), 106 states have call predecessors, (115), 115 states have call successors, (115) [2024-09-18 15:52:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 447 transitions. [2024-09-18 15:52:48,928 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 447 transitions. Word has length 60 [2024-09-18 15:52:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:48,928 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 447 transitions. [2024-09-18 15:52:48,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-18 15:52:48,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 447 transitions. [2024-09-18 15:52:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-18 15:52:48,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:48,929 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:48,956 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 15:52:49,130 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 [2024-09-18 15:52:49,130 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:49,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1640416879, now seen corresponding path program 2 times [2024-09-18 15:52:49,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:49,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982223494] [2024-09-18 15:52:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:49,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:52:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:52:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:52:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-18 15:52:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 15:52:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:52:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-18 15:52:49,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:49,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982223494] [2024-09-18 15:52:49,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982223494] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:49,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:49,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:49,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287526372] [2024-09-18 15:52:49,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:49,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:49,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:49,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:49,202 INFO L87 Difference]: Start difference. First operand 311 states and 447 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 15:52:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:49,386 INFO L93 Difference]: Finished difference Result 534 states and 771 transitions. [2024-09-18 15:52:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:49,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2024-09-18 15:52:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:49,393 INFO L225 Difference]: With dead ends: 534 [2024-09-18 15:52:49,393 INFO L226 Difference]: Without dead ends: 320 [2024-09-18 15:52:49,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:52:49,395 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:49,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-09-18 15:52:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 308. [2024-09-18 15:52:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 184 states have internal predecessors, (221), 109 states have call successors, (109), 16 states have call predecessors, (109), 15 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-18 15:52:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 437 transitions. [2024-09-18 15:52:49,505 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 437 transitions. Word has length 65 [2024-09-18 15:52:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:49,505 INFO L474 AbstractCegarLoop]: Abstraction has 308 states and 437 transitions. [2024-09-18 15:52:49,506 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 15:52:49,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 437 transitions. [2024-09-18 15:52:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-18 15:52:49,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:49,507 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:49,507 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-18 15:52:49,507 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:49,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -629454135, now seen corresponding path program 3 times [2024-09-18 15:52:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856813751] [2024-09-18 15:52:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:49,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:49,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791761863] [2024-09-18 15:52:49,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:52:49,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:49,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:49,520 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) [2024-09-18 15:52:49,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:52:49,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:52:49,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:49,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-18 15:52:49,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:52:50,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:54,465 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~k~0) c_main_~c~0 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (forall ((v_main_~p~0_23 Int) (v_main_~r~0_23 Int)) (or (< (+ (* v_main_~p~0_23 c_main_~x~0) (* v_main_~r~0_23 c_main_~y~0)) c_main_~b~0) (< c_main_~q~0 v_main_~p~0_23) (< c_main_~s~0 v_main_~r~0_23)))) is different from false [2024-09-18 15:52:55,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856813751] [2024-09-18 15:52:55,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791761863] [2024-09-18 15:52:55,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791761863] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:55,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:55,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-18 15:52:55,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921151088] [2024-09-18 15:52:55,248 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:55,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:52:55,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:55,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:52:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=462, Unknown=1, NotChecked=44, Total=600 [2024-09-18 15:52:55,250 INFO L87 Difference]: Start difference. First operand 308 states and 437 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-18 15:52:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:55,910 INFO L93 Difference]: Finished difference Result 336 states and 461 transitions. [2024-09-18 15:52:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:52:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 65 [2024-09-18 15:52:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:55,912 INFO L225 Difference]: With dead ends: 336 [2024-09-18 15:52:55,912 INFO L226 Difference]: Without dead ends: 334 [2024-09-18 15:52:55,913 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=155, Invalid=778, Unknown=1, NotChecked=58, Total=992 [2024-09-18 15:52:55,913 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:55,913 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 441 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-09-18 15:52:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2024-09-18 15:52:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 196 states have internal predecessors, (233), 109 states have call successors, (109), 20 states have call predecessors, (109), 19 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-18 15:52:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 449 transitions. [2024-09-18 15:52:56,027 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 449 transitions. Word has length 65 [2024-09-18 15:52:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:56,027 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 449 transitions. [2024-09-18 15:52:56,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-18 15:52:56,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 449 transitions. [2024-09-18 15:52:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-18 15:52:56,028 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:56,028 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:56,041 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-18 15:52:56,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 15:52:56,232 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:56,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash -232813088, now seen corresponding path program 1 times [2024-09-18 15:52:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:56,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999436905] [2024-09-18 15:52:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:56,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455384756] [2024-09-18 15:52:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:56,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:56,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:56,263 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) [2024-09-18 15:52:56,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:52:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:56,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-18 15:52:56,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-18 15:52:57,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:58,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999436905] [2024-09-18 15:52:58,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455384756] [2024-09-18 15:52:58,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455384756] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:58,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:58,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-18 15:52:58,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87106473] [2024-09-18 15:52:58,630 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:58,630 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:52:58,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:52:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:52:58,631 INFO L87 Difference]: Start difference. First operand 324 states and 449 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-18 15:52:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:59,627 INFO L93 Difference]: Finished difference Result 400 states and 561 transitions. [2024-09-18 15:52:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 15:52:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 79 [2024-09-18 15:52:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:59,630 INFO L225 Difference]: With dead ends: 400 [2024-09-18 15:52:59,630 INFO L226 Difference]: Without dead ends: 397 [2024-09-18 15:52:59,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-09-18 15:52:59,631 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:59,631 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 537 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:52:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-09-18 15:52:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2024-09-18 15:52:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 226 states have (on average 1.2079646017699115) internal successors, (273), 227 states have internal predecessors, (273), 137 states have call successors, (137), 22 states have call predecessors, (137), 21 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-18 15:52:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 545 transitions. [2024-09-18 15:52:59,781 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 545 transitions. Word has length 79 [2024-09-18 15:52:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:59,782 INFO L474 AbstractCegarLoop]: Abstraction has 385 states and 545 transitions. [2024-09-18 15:52:59,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-18 15:52:59,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 545 transitions. [2024-09-18 15:52:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-18 15:52:59,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:59,783 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:59,795 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 15:52:59,983 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 15:52:59,983 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:59,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash -203814726, now seen corresponding path program 1 times [2024-09-18 15:52:59,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:59,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168118237] [2024-09-18 15:52:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:59,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534165861] [2024-09-18 15:52:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:59,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:59,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:59,994 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) [2024-09-18 15:52:59,995 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:53:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:00,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 15:53:00,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-18 15:53:00,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-09-18 15:53:00,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:00,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168118237] [2024-09-18 15:53:00,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:00,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534165861] [2024-09-18 15:53:00,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534165861] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:00,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:00,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-18 15:53:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406931520] [2024-09-18 15:53:00,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:00,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:53:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:53:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:53:00,816 INFO L87 Difference]: Start difference. First operand 385 states and 545 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-18 15:53:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:02,342 INFO L93 Difference]: Finished difference Result 885 states and 1384 transitions. [2024-09-18 15:53:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-18 15:53:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 82 [2024-09-18 15:53:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:02,347 INFO L225 Difference]: With dead ends: 885 [2024-09-18 15:53:02,348 INFO L226 Difference]: Without dead ends: 883 [2024-09-18 15:53:02,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:53:02,349 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 148 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:02,349 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 436 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:53:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2024-09-18 15:53:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 829. [2024-09-18 15:53:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 403 states have (on average 1.3101736972704714) internal successors, (528), 404 states have internal predecessors, (528), 401 states have call successors, (401), 25 states have call predecessors, (401), 24 states have return successors, (399), 399 states have call predecessors, (399), 399 states have call successors, (399) [2024-09-18 15:53:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1328 transitions. [2024-09-18 15:53:02,797 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1328 transitions. Word has length 82 [2024-09-18 15:53:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:02,798 INFO L474 AbstractCegarLoop]: Abstraction has 829 states and 1328 transitions. [2024-09-18 15:53:02,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-18 15:53:02,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1328 transitions. [2024-09-18 15:53:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-18 15:53:02,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:02,799 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:02,811 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-18 15:53:02,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 15:53:02,999 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:03,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:03,000 INFO L85 PathProgramCache]: Analyzing trace with hash 807148018, now seen corresponding path program 1 times [2024-09-18 15:53:03,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:03,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343789794] [2024-09-18 15:53:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:03,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:03,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021688642] [2024-09-18 15:53:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:03,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:03,040 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) [2024-09-18 15:53:03,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 15:53:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:03,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-18 15:53:03,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-18 15:53:03,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-09-18 15:53:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343789794] [2024-09-18 15:53:04,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021688642] [2024-09-18 15:53:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021688642] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:04,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-18 15:53:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186555436] [2024-09-18 15:53:04,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:04,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 15:53:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 15:53:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:53:04,965 INFO L87 Difference]: Start difference. First operand 829 states and 1328 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-18 15:53:11,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:17,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:53:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:22,258 INFO L93 Difference]: Finished difference Result 1294 states and 2097 transitions. [2024-09-18 15:53:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-18 15:53:22,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 82 [2024-09-18 15:53:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:22,265 INFO L225 Difference]: With dead ends: 1294 [2024-09-18 15:53:22,265 INFO L226 Difference]: Without dead ends: 1292 [2024-09-18 15:53:22,266 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=854, Invalid=3178, Unknown=0, NotChecked=0, Total=4032 [2024-09-18 15:53:22,266 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 164 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 148 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:22,267 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 722 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 954 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2024-09-18 15:53:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2024-09-18 15:53:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1097. [2024-09-18 15:53:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 532 states have (on average 1.3233082706766917) internal successors, (704), 533 states have internal predecessors, (704), 537 states have call successors, (537), 28 states have call predecessors, (537), 27 states have return successors, (535), 535 states have call predecessors, (535), 535 states have call successors, (535) [2024-09-18 15:53:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1776 transitions. [2024-09-18 15:53:23,056 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1776 transitions. Word has length 82 [2024-09-18 15:53:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:23,057 INFO L474 AbstractCegarLoop]: Abstraction has 1097 states and 1776 transitions. [2024-09-18 15:53:23,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-18 15:53:23,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1776 transitions. [2024-09-18 15:53:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-18 15:53:23,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:23,058 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:23,071 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:23,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-18 15:53:23,263 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:23,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:23,263 INFO L85 PathProgramCache]: Analyzing trace with hash 590263059, now seen corresponding path program 4 times [2024-09-18 15:53:23,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:23,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055882506] [2024-09-18 15:53:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:23,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:23,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211097224] [2024-09-18 15:53:23,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:53:23,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:23,287 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) [2024-09-18 15:53:23,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 15:53:23,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:53:23,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:23,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-18 15:53:23,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-18 15:53:24,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-18 15:53:25,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:25,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055882506] [2024-09-18 15:53:25,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:25,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211097224] [2024-09-18 15:53:25,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211097224] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:25,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:25,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2024-09-18 15:53:25,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717475114] [2024-09-18 15:53:25,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:25,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:53:25,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:53:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:53:25,589 INFO L87 Difference]: Start difference. First operand 1097 states and 1776 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-18 15:53:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:30,520 INFO L93 Difference]: Finished difference Result 1227 states and 1974 transitions. [2024-09-18 15:53:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 15:53:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 85 [2024-09-18 15:53:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:30,527 INFO L225 Difference]: With dead ends: 1227 [2024-09-18 15:53:30,528 INFO L226 Difference]: Without dead ends: 1225 [2024-09-18 15:53:30,528 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2024-09-18 15:53:30,529 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 86 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:30,529 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 582 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-18 15:53:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-18 15:53:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1117. [2024-09-18 15:53:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 547 states have (on average 1.3144424131627057) internal successors, (719), 548 states have internal predecessors, (719), 537 states have call successors, (537), 33 states have call predecessors, (537), 32 states have return successors, (535), 535 states have call predecessors, (535), 535 states have call successors, (535) [2024-09-18 15:53:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1791 transitions. [2024-09-18 15:53:31,442 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1791 transitions. Word has length 85 [2024-09-18 15:53:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:31,443 INFO L474 AbstractCegarLoop]: Abstraction has 1117 states and 1791 transitions. [2024-09-18 15:53:31,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-18 15:53:31,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1791 transitions. [2024-09-18 15:53:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-18 15:53:31,444 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:31,444 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:31,456 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-18 15:53:31,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:31,649 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:31,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1412818839, now seen corresponding path program 2 times [2024-09-18 15:53:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:31,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584351048] [2024-09-18 15:53:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:31,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:53:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:53:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:53:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:53:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-18 15:53:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-18 15:53:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-18 15:53:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-18 15:53:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:53:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:53:31,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:31,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584351048] [2024-09-18 15:53:31,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584351048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:31,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808521690] [2024-09-18 15:53:31,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:31,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:31,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:31,804 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) [2024-09-18 15:53:31,806 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 15:53:31,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:31,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:31,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-18 15:53:31,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:53:31,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:53:31,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808521690] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:31,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:31,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-18 15:53:31,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083921892] [2024-09-18 15:53:31,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:31,994 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:53:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:53:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:53:31,995 INFO L87 Difference]: Start difference. First operand 1117 states and 1791 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-18 15:53:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:33,254 INFO L93 Difference]: Finished difference Result 1255 states and 2007 transitions. [2024-09-18 15:53:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:53:33,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2024-09-18 15:53:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:33,261 INFO L225 Difference]: With dead ends: 1255 [2024-09-18 15:53:33,261 INFO L226 Difference]: Without dead ends: 1248 [2024-09-18 15:53:33,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 194 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:53:33,262 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:33,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 365 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:53:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2024-09-18 15:53:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1086. [2024-09-18 15:53:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 524 states have (on average 1.3206106870229009) internal successors, (692), 525 states have internal predecessors, (692), 529 states have call successors, (529), 33 states have call predecessors, (529), 32 states have return successors, (527), 527 states have call predecessors, (527), 527 states have call successors, (527) [2024-09-18 15:53:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1748 transitions. [2024-09-18 15:53:34,160 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1748 transitions. Word has length 87 [2024-09-18 15:53:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:34,160 INFO L474 AbstractCegarLoop]: Abstraction has 1086 states and 1748 transitions. [2024-09-18 15:53:34,161 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-18 15:53:34,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1748 transitions. [2024-09-18 15:53:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-18 15:53:34,162 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:34,162 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:34,174 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-18 15:53:34,362 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:34,363 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:34,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1409368955, now seen corresponding path program 5 times [2024-09-18 15:53:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:34,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550550446] [2024-09-18 15:53:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:34,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414187038] [2024-09-18 15:53:34,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:53:34,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:34,376 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) [2024-09-18 15:53:34,377 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 15:53:34,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-18 15:53:34,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:34,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-18 15:53:34,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-18 15:53:36,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:37,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550550446] [2024-09-18 15:53:37,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414187038] [2024-09-18 15:53:37,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414187038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:37,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:37,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-18 15:53:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391635114] [2024-09-18 15:53:37,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:37,508 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:53:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:53:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-09-18 15:53:37,509 INFO L87 Difference]: Start difference. First operand 1086 states and 1748 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-18 15:53:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:39,478 INFO L93 Difference]: Finished difference Result 1223 states and 1954 transitions. [2024-09-18 15:53:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:53:39,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 90 [2024-09-18 15:53:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:39,484 INFO L225 Difference]: With dead ends: 1223 [2024-09-18 15:53:39,485 INFO L226 Difference]: Without dead ends: 1221 [2024-09-18 15:53:39,485 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 15:53:39,486 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 50 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:39,486 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 597 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:53:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-09-18 15:53:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1203. [2024-09-18 15:53:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 581 states have (on average 1.3184165232358003) internal successors, (766), 582 states have internal predecessors, (766), 585 states have call successors, (585), 37 states have call predecessors, (585), 36 states have return successors, (583), 583 states have call predecessors, (583), 583 states have call successors, (583) [2024-09-18 15:53:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1934 transitions. [2024-09-18 15:53:40,419 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1934 transitions. Word has length 90 [2024-09-18 15:53:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:40,420 INFO L474 AbstractCegarLoop]: Abstraction has 1203 states and 1934 transitions. [2024-09-18 15:53:40,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-18 15:53:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1934 transitions. [2024-09-18 15:53:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-18 15:53:40,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:40,422 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:40,428 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-18 15:53:40,624 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:40,625 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1093787319, now seen corresponding path program 2 times [2024-09-18 15:53:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:40,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460344824] [2024-09-18 15:53:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:40,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455529157] [2024-09-18 15:53:40,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:40,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:40,640 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) [2024-09-18 15:53:40,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 15:53:40,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:40,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:40,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-18 15:53:40,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-18 15:53:41,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-18 15:53:43,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460344824] [2024-09-18 15:53:43,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455529157] [2024-09-18 15:53:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455529157] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:43,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:43,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2024-09-18 15:53:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950772990] [2024-09-18 15:53:43,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:43,611 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 15:53:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 15:53:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-09-18 15:53:43,612 INFO L87 Difference]: Start difference. First operand 1203 states and 1934 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-18 15:53:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:54,293 INFO L93 Difference]: Finished difference Result 1418 states and 2256 transitions. [2024-09-18 15:53:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-18 15:53:54,295 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 96 [2024-09-18 15:53:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:54,306 INFO L225 Difference]: With dead ends: 1418 [2024-09-18 15:53:54,306 INFO L226 Difference]: Without dead ends: 1410 [2024-09-18 15:53:54,307 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1128, Invalid=4572, Unknown=0, NotChecked=0, Total=5700 [2024-09-18 15:53:54,307 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 221 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:54,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 858 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-18 15:53:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2024-09-18 15:53:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1384. [2024-09-18 15:53:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 677 states have (on average 1.3161004431314622) internal successors, (891), 678 states have internal predecessors, (891), 665 states have call successors, (665), 42 states have call predecessors, (665), 41 states have return successors, (663), 663 states have call predecessors, (663), 663 states have call successors, (663) [2024-09-18 15:53:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2219 transitions. [2024-09-18 15:53:55,461 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2219 transitions. Word has length 96 [2024-09-18 15:53:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:55,461 INFO L474 AbstractCegarLoop]: Abstraction has 1384 states and 2219 transitions. [2024-09-18 15:53:55,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-18 15:53:55,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2219 transitions. [2024-09-18 15:53:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-18 15:53:55,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:55,463 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:55,478 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-18 15:53:55,666 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-18 15:53:55,667 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:55,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash -187092685, now seen corresponding path program 6 times [2024-09-18 15:53:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:55,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172546518] [2024-09-18 15:53:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:55,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380810837] [2024-09-18 15:53:55,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:53:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:55,707 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) [2024-09-18 15:53:55,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-18 15:53:55,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 15:53:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:55,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-18 15:53:55,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-09-18 15:53:58,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:00,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:00,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172546518] [2024-09-18 15:54:00,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:00,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380810837] [2024-09-18 15:54:00,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380810837] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:00,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:54:00,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-18 15:54:00,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89237265] [2024-09-18 15:54:00,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:00,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 15:54:00,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 15:54:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:54:00,728 INFO L87 Difference]: Start difference. First operand 1384 states and 2219 transitions. Second operand has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-18 15:54:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:03,941 INFO L93 Difference]: Finished difference Result 1514 states and 2421 transitions. [2024-09-18 15:54:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:54:03,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 95 [2024-09-18 15:54:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:03,952 INFO L225 Difference]: With dead ends: 1514 [2024-09-18 15:54:03,952 INFO L226 Difference]: Without dead ends: 1512 [2024-09-18 15:54:03,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2024-09-18 15:54:03,954 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:03,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 316 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:54:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2024-09-18 15:54:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1396. [2024-09-18 15:54:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 686 states have (on average 1.3119533527696794) internal successors, (900), 688 states have internal predecessors, (900), 667 states have call successors, (667), 43 states have call predecessors, (667), 42 states have return successors, (665), 664 states have call predecessors, (665), 665 states have call successors, (665) [2024-09-18 15:54:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2232 transitions. [2024-09-18 15:54:05,296 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2232 transitions. Word has length 95 [2024-09-18 15:54:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:05,296 INFO L474 AbstractCegarLoop]: Abstraction has 1396 states and 2232 transitions. [2024-09-18 15:54:05,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-18 15:54:05,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2232 transitions. [2024-09-18 15:54:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-18 15:54:05,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:05,298 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:05,304 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-18 15:54:05,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-18 15:54:05,503 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1017703828, now seen corresponding path program 3 times [2024-09-18 15:54:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335585021] [2024-09-18 15:54:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:05,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624065252] [2024-09-18 15:54:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:54:05,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:05,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:05,516 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) [2024-09-18 15:54:05,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-18 15:54:05,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-18 15:54:05,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:05,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-18 15:54:05,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-18 15:54:06,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-18 15:54:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335585021] [2024-09-18 15:54:09,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624065252] [2024-09-18 15:54:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624065252] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:09,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:54:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2024-09-18 15:54:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333559522] [2024-09-18 15:54:09,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:09,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-18 15:54:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-18 15:54:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:54:09,574 INFO L87 Difference]: Start difference. First operand 1396 states and 2232 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-18 15:54:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:27,215 INFO L93 Difference]: Finished difference Result 2187 states and 3492 transitions. [2024-09-18 15:54:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-18 15:54:27,215 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 99 [2024-09-18 15:54:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:27,222 INFO L225 Difference]: With dead ends: 2187 [2024-09-18 15:54:27,223 INFO L226 Difference]: Without dead ends: 1640 [2024-09-18 15:54:27,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1791, Invalid=7715, Unknown=0, NotChecked=0, Total=9506 [2024-09-18 15:54:27,226 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 258 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:27,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 724 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-09-18 15:54:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2024-09-18 15:54:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1501. [2024-09-18 15:54:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 735 states have (on average 1.308843537414966) internal successors, (962), 737 states have internal predecessors, (962), 719 states have call successors, (719), 47 states have call predecessors, (719), 46 states have return successors, (717), 716 states have call predecessors, (717), 717 states have call successors, (717) [2024-09-18 15:54:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2398 transitions. [2024-09-18 15:54:28,728 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2398 transitions. Word has length 99 [2024-09-18 15:54:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:28,729 INFO L474 AbstractCegarLoop]: Abstraction has 1501 states and 2398 transitions. [2024-09-18 15:54:28,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-18 15:54:28,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2398 transitions. [2024-09-18 15:54:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-18 15:54:28,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:28,730 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:28,736 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-18 15:54:28,931 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-18 15:54:28,931 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:28,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:28,932 INFO L85 PathProgramCache]: Analyzing trace with hash -396138734, now seen corresponding path program 4 times [2024-09-18 15:54:28,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:28,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599448811] [2024-09-18 15:54:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:28,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234452450] [2024-09-18 15:54:28,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:54:28,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:28,945 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) [2024-09-18 15:54:28,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-18 15:54:29,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:54:29,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:29,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-18 15:54:29,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 52 proven. 46 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-18 15:54:31,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:38,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:38,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599448811] [2024-09-18 15:54:38,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:38,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234452450] [2024-09-18 15:54:38,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234452450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:38,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:54:38,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-18 15:54:38,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905298915] [2024-09-18 15:54:38,640 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:38,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 15:54:38,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:38,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 15:54:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2024-09-18 15:54:38,641 INFO L87 Difference]: Start difference. First operand 1501 states and 2398 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-18 15:54:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:42,937 INFO L93 Difference]: Finished difference Result 1632 states and 2600 transitions. [2024-09-18 15:54:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 15:54:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 104 [2024-09-18 15:54:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:42,946 INFO L225 Difference]: With dead ends: 1632 [2024-09-18 15:54:42,946 INFO L226 Difference]: Without dead ends: 1625 [2024-09-18 15:54:42,947 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2024-09-18 15:54:42,948 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 84 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:42,948 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 449 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-18 15:54:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2024-09-18 15:54:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1505. [2024-09-18 15:54:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 738 states have (on average 1.3075880758807588) internal successors, (965), 740 states have internal predecessors, (965), 719 states have call successors, (719), 48 states have call predecessors, (719), 47 states have return successors, (717), 716 states have call predecessors, (717), 717 states have call successors, (717) [2024-09-18 15:54:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2401 transitions. [2024-09-18 15:54:44,557 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2401 transitions. Word has length 104 [2024-09-18 15:54:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:44,558 INFO L474 AbstractCegarLoop]: Abstraction has 1505 states and 2401 transitions. [2024-09-18 15:54:44,558 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-18 15:54:44,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:44,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2401 transitions. [2024-09-18 15:54:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-18 15:54:44,560 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:44,561 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:44,573 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-18 15:54:44,766 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-18 15:54:44,767 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:44,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash 920643019, now seen corresponding path program 2 times [2024-09-18 15:54:44,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:44,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359281666] [2024-09-18 15:54:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:44,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251213004] [2024-09-18 15:54:44,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:54:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:44,782 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:54:44,783 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-18 15:54:44,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:54:44,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:44,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-18 15:54:44,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 52 proven. 56 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-18 15:54:45,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-18 15:54:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:50,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359281666] [2024-09-18 15:54:50,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:50,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251213004] [2024-09-18 15:54:50,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251213004] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:50,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:54:50,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-09-18 15:54:50,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886981352] [2024-09-18 15:54:50,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:50,671 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-18 15:54:50,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:50,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-18 15:54:50,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:54:50,673 INFO L87 Difference]: Start difference. First operand 1505 states and 2401 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-18 15:55:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:55:07,908 INFO L93 Difference]: Finished difference Result 1762 states and 2763 transitions. [2024-09-18 15:55:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-18 15:55:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 109 [2024-09-18 15:55:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:55:07,917 INFO L225 Difference]: With dead ends: 1762 [2024-09-18 15:55:07,918 INFO L226 Difference]: Without dead ends: 1760 [2024-09-18 15:55:07,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2024-09-18 15:55:07,920 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 244 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:55:07,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 674 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-18 15:55:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2024-09-18 15:55:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1616. [2024-09-18 15:55:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 821 states have (on average 1.294762484774665) internal successors, (1063), 826 states have internal predecessors, (1063), 741 states have call successors, (741), 54 states have call predecessors, (741), 53 states have return successors, (739), 735 states have call predecessors, (739), 739 states have call successors, (739) [2024-09-18 15:55:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2543 transitions. [2024-09-18 15:55:10,001 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2543 transitions. Word has length 109 [2024-09-18 15:55:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:55:10,002 INFO L474 AbstractCegarLoop]: Abstraction has 1616 states and 2543 transitions. [2024-09-18 15:55:10,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-18 15:55:10,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2543 transitions. [2024-09-18 15:55:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-18 15:55:10,007 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:55:10,007 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:55:10,023 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-18 15:55:10,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-18 15:55:10,207 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:55:10,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2081223370, now seen corresponding path program 5 times [2024-09-18 15:55:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:55:10,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539347043] [2024-09-18 15:55:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:55:10,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:55:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:55:10,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868127415] [2024-09-18 15:55:10,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:55:10,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:55:10,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:55:10,235 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:55:10,238 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-18 15:55:10,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-18 15:55:10,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:55:10,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-18 15:55:10,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:55:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-18 15:55:11,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:55:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-09-18 15:55:15,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:55:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539347043] [2024-09-18 15:55:15,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:55:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868127415] [2024-09-18 15:55:15,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868127415] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:55:15,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:55:15,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-09-18 15:55:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988296134] [2024-09-18 15:55:15,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:55:15,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-18 15:55:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:55:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-18 15:55:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 15:55:15,549 INFO L87 Difference]: Start difference. First operand 1616 states and 2543 transitions. Second operand has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-18 15:55:45,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:55:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:55:49,771 INFO L93 Difference]: Finished difference Result 1808 states and 2805 transitions. [2024-09-18 15:55:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-18 15:55:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 109 [2024-09-18 15:55:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:55:49,779 INFO L225 Difference]: With dead ends: 1808 [2024-09-18 15:55:49,779 INFO L226 Difference]: Without dead ends: 1804 [2024-09-18 15:55:49,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1369, Invalid=5771, Unknown=0, NotChecked=0, Total=7140 [2024-09-18 15:55:49,781 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 275 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 319 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:55:49,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 936 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1346 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2024-09-18 15:55:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2024-09-18 15:55:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1715. [2024-09-18 15:55:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 865 states have (on average 1.2913294797687862) internal successors, (1117), 870 states have internal predecessors, (1117), 789 states have call successors, (789), 61 states have call predecessors, (789), 60 states have return successors, (787), 783 states have call predecessors, (787), 787 states have call successors, (787) [2024-09-18 15:55:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2693 transitions. [2024-09-18 15:55:52,615 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2693 transitions. Word has length 109 [2024-09-18 15:55:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:55:52,615 INFO L474 AbstractCegarLoop]: Abstraction has 1715 states and 2693 transitions. [2024-09-18 15:55:52,615 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-18 15:55:52,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2693 transitions. [2024-09-18 15:55:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-18 15:55:52,618 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:55:52,618 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:55:52,625 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-18 15:55:52,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-18 15:55:52,819 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:55:52,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1733684403, now seen corresponding path program 6 times [2024-09-18 15:55:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:55:52,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969539550] [2024-09-18 15:55:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:55:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:55:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:55:52,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187418427] [2024-09-18 15:55:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:55:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:55:52,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:55:52,838 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:55:52,838 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-18 15:55:52,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-18 15:55:52,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:55:52,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-18 15:55:52,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:55:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 95 proven. 67 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2024-09-18 15:55:54,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:55:55,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:55:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969539550] [2024-09-18 15:55:55,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:55:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187418427] [2024-09-18 15:55:55,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187418427] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:55:55,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:55:55,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-18 15:55:55,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873185665] [2024-09-18 15:55:55,630 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:55:55,630 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 15:55:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:55:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 15:55:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:55:55,631 INFO L87 Difference]: Start difference. First operand 1715 states and 2693 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-18 15:56:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:56:00,210 INFO L93 Difference]: Finished difference Result 2025 states and 3174 transitions. [2024-09-18 15:56:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:56:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 126 [2024-09-18 15:56:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:56:00,220 INFO L225 Difference]: With dead ends: 2025 [2024-09-18 15:56:00,220 INFO L226 Difference]: Without dead ends: 2022 [2024-09-18 15:56:00,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 15:56:00,221 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 64 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:56:00,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 666 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 15:56:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2024-09-18 15:56:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1894. [2024-09-18 15:56:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 955 states have (on average 1.2910994764397905) internal successors, (1233), 960 states have internal predecessors, (1233), 869 states have call successors, (869), 70 states have call predecessors, (869), 69 states have return successors, (867), 863 states have call predecessors, (867), 867 states have call successors, (867) [2024-09-18 15:56:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2969 transitions. [2024-09-18 15:56:03,699 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2969 transitions. Word has length 126 [2024-09-18 15:56:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:56:03,699 INFO L474 AbstractCegarLoop]: Abstraction has 1894 states and 2969 transitions. [2024-09-18 15:56:03,699 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-18 15:56:03,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2969 transitions. [2024-09-18 15:56:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-18 15:56:03,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:56:03,702 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:56:03,708 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-18 15:56:03,905 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-18 15:56:03,906 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:56:03,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1887231395, now seen corresponding path program 3 times [2024-09-18 15:56:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:56:03,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906422201] [2024-09-18 15:56:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:56:03,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:56:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:56:03,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555060101] [2024-09-18 15:56:03,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:56:03,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:56:03,923 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:56:03,924 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-18 15:56:03,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-18 15:56:03,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:56:03,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-18 15:56:03,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:56:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2024-09-18 15:56:05,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:56:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:56:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906422201] [2024-09-18 15:56:08,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:56:08,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555060101] [2024-09-18 15:56:08,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555060101] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:56:08,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:56:08,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-18 15:56:08,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007462309] [2024-09-18 15:56:08,521 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:56:08,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:56:08,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:56:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:56:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:56:08,522 INFO L87 Difference]: Start difference. First operand 1894 states and 2969 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 15:56:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:56:12,660 INFO L93 Difference]: Finished difference Result 2079 states and 3255 transitions. [2024-09-18 15:56:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:56:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2024-09-18 15:56:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:56:12,669 INFO L225 Difference]: With dead ends: 2079 [2024-09-18 15:56:12,669 INFO L226 Difference]: Without dead ends: 2077 [2024-09-18 15:56:12,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 15:56:12,670 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:56:12,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 340 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:56:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2024-09-18 15:56:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2032. [2024-09-18 15:56:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 1025 states have (on average 1.2926829268292683) internal successors, (1325), 1030 states have internal predecessors, (1325), 933 states have call successors, (933), 74 states have call predecessors, (933), 73 states have return successors, (931), 927 states have call predecessors, (931), 931 states have call successors, (931) [2024-09-18 15:56:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 3189 transitions. [2024-09-18 15:56:16,097 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 3189 transitions. Word has length 129 [2024-09-18 15:56:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:56:16,097 INFO L474 AbstractCegarLoop]: Abstraction has 2032 states and 3189 transitions. [2024-09-18 15:56:16,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 15:56:16,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 3189 transitions. [2024-09-18 15:56:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-18 15:56:16,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:56:16,100 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:56:16,113 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-18 15:56:16,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-18 15:56:16,301 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:56:16,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:16,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1329164778, now seen corresponding path program 7 times [2024-09-18 15:56:16,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:56:16,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404712183] [2024-09-18 15:56:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:56:16,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:56:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:56:16,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356649646] [2024-09-18 15:56:16,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:56:16,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:16,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:56:16,326 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:56:16,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-18 15:56:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:56:16,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-18 15:56:16,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:56:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 70 proven. 76 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-09-18 15:56:17,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:56:19,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:56:19,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404712183] [2024-09-18 15:56:19,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:56:19,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356649646] [2024-09-18 15:56:19,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356649646] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:56:19,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:56:19,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-18 15:56:19,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026084645] [2024-09-18 15:56:19,009 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:56:19,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:56:19,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:56:19,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:56:19,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:56:19,010 INFO L87 Difference]: Start difference. First operand 2032 states and 3189 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-18 15:56:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:56:23,710 INFO L93 Difference]: Finished difference Result 2166 states and 3395 transitions. [2024-09-18 15:56:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:56:23,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 129 [2024-09-18 15:56:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:56:23,718 INFO L225 Difference]: With dead ends: 2166 [2024-09-18 15:56:23,719 INFO L226 Difference]: Without dead ends: 2159 [2024-09-18 15:56:23,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-09-18 15:56:23,719 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:56:23,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 494 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:56:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2024-09-18 15:56:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2144. [2024-09-18 15:56:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1079 states have (on average 1.294717330861909) internal successors, (1397), 1084 states have internal predecessors, (1397), 989 states have call successors, (989), 76 states have call predecessors, (989), 75 states have return successors, (987), 983 states have call predecessors, (987), 987 states have call successors, (987) [2024-09-18 15:56:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3373 transitions. [2024-09-18 15:56:27,378 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3373 transitions. Word has length 129 [2024-09-18 15:56:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:56:27,378 INFO L474 AbstractCegarLoop]: Abstraction has 2144 states and 3373 transitions. [2024-09-18 15:56:27,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-18 15:56:27,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3373 transitions. [2024-09-18 15:56:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-18 15:56:27,381 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:56:27,381 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:56:27,408 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-18 15:56:27,582 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:27,582 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:56:27,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 979073460, now seen corresponding path program 4 times [2024-09-18 15:56:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:56:27,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113152328] [2024-09-18 15:56:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:56:27,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:56:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:56:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686468567] [2024-09-18 15:56:27,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:56:27,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:27,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:56:27,606 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:56:27,607 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-18 15:56:27,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:56:27,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:56:27,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-18 15:56:27,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:56:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2024-09-18 15:56:28,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:56:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 63 proven. 107 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-09-18 15:56:34,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:56:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113152328] [2024-09-18 15:56:34,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:56:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686468567] [2024-09-18 15:56:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686468567] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:56:34,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:56:34,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2024-09-18 15:56:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276465304] [2024-09-18 15:56:34,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:56:34,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-18 15:56:34,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:56:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-18 15:56:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:56:34,685 INFO L87 Difference]: Start difference. First operand 2144 states and 3373 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 37 states have internal predecessors, (87), 13 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2024-09-18 15:56:54,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:57:06,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []