./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-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/egcd2-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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --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 15:52:33,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:52:33,656 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:52:33,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:52:33,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:52:33,681 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:52:33,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:52:33,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:52:33,682 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:52:33,682 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:52:33,683 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:52:33,683 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:52:33,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:52:33,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:52:33,687 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:52:33,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:52:33,688 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:52:33,688 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:52:33,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:52:33,688 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:52:33,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:52:33,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:52:33,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:52:33,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:52:33,690 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:52:33,690 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:52:33,691 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:52:33,691 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:52:33,691 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:52:33,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:52:33,691 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:52:33,691 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:52:33,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:52:33,691 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:52:33,692 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:52:33,692 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:52:33,692 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:52:33,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:52:33,692 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:52:33,692 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:52:33,692 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:52:33,693 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:52:33,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:52:33,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:52:33,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:52:33,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:52:33,920 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:52:33,920 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:52:33,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-18 15:52:35,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:52:35,252 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:52:35,255 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-18 15:52:35,263 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8df475e11/3569f99911804564a0f87b33e29a33fa/FLAG9f22952f3 [2024-09-18 15:52:35,668 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8df475e11/3569f99911804564a0f87b33e29a33fa [2024-09-18 15:52:35,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:52:35,671 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:52:35,672 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:52:35,672 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:52:35,677 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:52:35,677 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,678 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e093e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35, skipping insertion in model container [2024-09-18 15:52:35,678 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,691 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:52:35,819 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/egcd2-ll.c[490,503] [2024-09-18 15:52:35,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:52:35,851 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:52:35,864 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/egcd2-ll.c[490,503] [2024-09-18 15:52:35,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:52:35,901 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:52:35,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35 WrapperNode [2024-09-18 15:52:35,904 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:52:35,905 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:52:35,905 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:52:35,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:52:35,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,923 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:52:35,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:52:35,924 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:52:35,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:52:35,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:52:35,930 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,931 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,941 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 15:52:35,941 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,947 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:52:35,952 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:52:35,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:52:35,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:52:35,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (1/1) ... [2024-09-18 15:52:35,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:52:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:35,980 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 15:52:35,981 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 15:52:36,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:52:36,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 15:52:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 15:52:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:52:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:52:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:52:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:52:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:52:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:52:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:52:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:52:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:52:36,060 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:52:36,061 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:52:36,208 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-18 15:52:36,208 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:52:36,222 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:52:36,222 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:52:36,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:52:36 BoogieIcfgContainer [2024-09-18 15:52:36,222 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:52:36,224 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:52:36,225 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:52:36,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:52:36,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:52:35" (1/3) ... [2024-09-18 15:52:36,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dea42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:52:36, skipping insertion in model container [2024-09-18 15:52:36,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:52:35" (2/3) ... [2024-09-18 15:52:36,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dea42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:52:36, skipping insertion in model container [2024-09-18 15:52:36,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:52:36" (3/3) ... [2024-09-18 15:52:36,232 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-09-18 15:52:36,244 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:52:36,244 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:52:36,284 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:52:36,288 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;@2863b9f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:52:36,288 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:52:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:52:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:52:36,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:36,298 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:36,298 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:36,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1130788706, now seen corresponding path program 1 times [2024-09-18 15:52:36,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680120413] [2024-09-18 15:52:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:52:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:52:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:52:36,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:36,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680120413] [2024-09-18 15:52:36,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680120413] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:36,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:36,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:52:36,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959196535] [2024-09-18 15:52:36,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:36,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:52:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:52:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:52:36,464 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:52:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:36,492 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2024-09-18 15:52:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:52:36,494 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-18 15:52:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:36,498 INFO L225 Difference]: With dead ends: 64 [2024-09-18 15:52:36,498 INFO L226 Difference]: Without dead ends: 31 [2024-09-18 15:52:36,501 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 15:52:36,503 INFO L434 NwaCegarLoop]: 42 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, 42 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 15:52:36,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-18 15:52:36,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-18 15:52:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 15:52:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-09-18 15:52:36,533 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 31 [2024-09-18 15:52:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:36,533 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-09-18 15:52:36,534 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:52:36,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-09-18 15:52:36,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:52:36,535 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:36,535 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:36,536 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:52:36,536 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:36,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1704590499, now seen corresponding path program 1 times [2024-09-18 15:52:36,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:36,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212778174] [2024-09-18 15:52:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:36,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:52:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:52:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:52:36,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:36,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212778174] [2024-09-18 15:52:36,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212778174] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:36,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735837601] [2024-09-18 15:52:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:36,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:36,766 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 15:52:36,775 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 15:52:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:36,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:52:36,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:52:36,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:36,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735837601] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:36,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:36,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-09-18 15:52:36,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15048577] [2024-09-18 15:52:36,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:36,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:52:36,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:36,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:52:36,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:52:36,993 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 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 15:52:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:37,073 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2024-09-18 15:52:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:52:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 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 32 [2024-09-18 15:52:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:37,076 INFO L225 Difference]: With dead ends: 48 [2024-09-18 15:52:37,076 INFO L226 Difference]: Without dead ends: 46 [2024-09-18 15:52:37,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:52:37,077 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:37,078 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-18 15:52:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-09-18 15:52:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 15:52:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2024-09-18 15:52:37,095 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 32 [2024-09-18 15:52:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:37,096 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2024-09-18 15:52:37,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 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 15:52:37,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2024-09-18 15:52:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:52:37,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:37,100 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:37,112 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 15:52:37,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:37,302 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:37,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1312615442, now seen corresponding path program 1 times [2024-09-18 15:52:37,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:37,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246061666] [2024-09-18 15:52:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:37,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139971867] [2024-09-18 15:52:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:37,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:37,327 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 15:52:37,328 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 15:52:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:52:37,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:52:37,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:37,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:37,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246061666] [2024-09-18 15:52:37,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:37,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139971867] [2024-09-18 15:52:37,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139971867] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:37,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:37,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137976460] [2024-09-18 15:52:37,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:37,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:37,398 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 15:52:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:37,453 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-09-18 15:52:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-18 15:52:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:37,456 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:52:37,456 INFO L226 Difference]: Without dead ends: 61 [2024-09-18 15:52:37,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 15:52:37,457 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 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 15:52:37,459 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-18 15:52:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-09-18 15:52:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 15:52:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2024-09-18 15:52:37,477 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 33 [2024-09-18 15:52:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:37,477 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2024-09-18 15:52:37,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 15:52:37,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2024-09-18 15:52:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 15:52:37,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:37,478 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 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 15:52:37,491 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:52:37,679 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:37,679 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:37,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1674155548, now seen corresponding path program 1 times [2024-09-18 15:52:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162942678] [2024-09-18 15:52:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:52:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:52:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:52:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:52:37,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162942678] [2024-09-18 15:52:37,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162942678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:37,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734145017] [2024-09-18 15:52:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:37,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:37,807 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 15:52:37,808 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 15:52:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:37,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:52:37,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:52:37,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:37,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734145017] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:37,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:37,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-18 15:52:37,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065918228] [2024-09-18 15:52:37,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:37,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:37,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:37,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:52:37,948 INFO L87 Difference]: Start difference. First operand 52 states and 68 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, (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 15:52:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:38,021 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-09-18 15:52:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:38,022 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, (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 37 [2024-09-18 15:52:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:38,023 INFO L225 Difference]: With dead ends: 60 [2024-09-18 15:52:38,023 INFO L226 Difference]: Without dead ends: 56 [2024-09-18 15:52:38,023 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:52:38,024 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:38,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-18 15:52:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-18 15:52:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 15:52:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-18 15:52:38,038 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2024-09-18 15:52:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:38,039 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-18 15:52:38,039 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, (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 15:52:38,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-18 15:52:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 15:52:38,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:38,040 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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 15:52:38,053 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 15:52:38,240 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:38,241 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:38,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:38,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1754125331, now seen corresponding path program 1 times [2024-09-18 15:52:38,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:38,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251526540] [2024-09-18 15:52:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:38,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:38,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478407708] [2024-09-18 15:52:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:38,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:38,264 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 15:52:38,264 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 15:52:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:52:38,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:52:38,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:52:38,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251526540] [2024-09-18 15:52:38,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478407708] [2024-09-18 15:52:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478407708] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:52:38,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:52:38,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:52:38,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551650837] [2024-09-18 15:52:38,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:52:38,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:52:38,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:52:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:52:38,441 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-18 15:52:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:38,492 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-09-18 15:52:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:52:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-09-18 15:52:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:38,493 INFO L225 Difference]: With dead ends: 62 [2024-09-18 15:52:38,493 INFO L226 Difference]: Without dead ends: 60 [2024-09-18 15:52:38,494 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 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 15:52:38,494 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:38,494 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:52:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-18 15:52:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-18 15:52:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-18 15:52:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-09-18 15:52:38,506 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 48 [2024-09-18 15:52:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:38,506 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-09-18 15:52:38,507 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-18 15:52:38,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-09-18 15:52:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-18 15:52:38,508 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:38,508 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2024-09-18 15:52:38,520 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:52:38,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:38,708 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:38,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash -914162351, now seen corresponding path program 1 times [2024-09-18 15:52:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:38,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151377260] [2024-09-18 15:52:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:38,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398935977] [2024-09-18 15:52:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:38,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:38,729 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 15:52:38,730 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 15:52:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:52:38,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-18 15:52:38,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-18 15:52:38,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:38,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151377260] [2024-09-18 15:52:38,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:38,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398935977] [2024-09-18 15:52:38,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398935977] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:38,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:52:38,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-18 15:52:38,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072947803] [2024-09-18 15:52:38,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:38,940 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:52:38,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:38,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:52:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:52:38,942 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-18 15:52:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:39,037 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-09-18 15:52:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:52:39,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-09-18 15:52:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:39,038 INFO L225 Difference]: With dead ends: 87 [2024-09-18 15:52:39,038 INFO L226 Difference]: Without dead ends: 85 [2024-09-18 15:52:39,039 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:52:39,039 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:39,039 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 203 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-18 15:52:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2024-09-18 15:52:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-18 15:52:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-09-18 15:52:39,056 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 55 [2024-09-18 15:52:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:39,057 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-09-18 15:52:39,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-18 15:52:39,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-09-18 15:52:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 15:52:39,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:39,061 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2024-09-18 15:52:39,074 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:52:39,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 15:52:39,262 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:39,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash -268943045, now seen corresponding path program 1 times [2024-09-18 15:52:39,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:39,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34053596] [2024-09-18 15:52:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:52:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:52:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:52:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:52:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:52:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:52:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:52:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:52:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 15:52:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34053596] [2024-09-18 15:52:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34053596] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778949814] [2024-09-18 15:52:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:39,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:39,425 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 15:52:39,426 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 15:52:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:52:39,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 15:52:39,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 15:52:39,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778949814] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:39,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:39,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-18 15:52:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151387191] [2024-09-18 15:52:39,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:39,560 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:52:39,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:52:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:52:39,560 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-18 15:52:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:39,690 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-09-18 15:52:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:52:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 57 [2024-09-18 15:52:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:39,691 INFO L225 Difference]: With dead ends: 102 [2024-09-18 15:52:39,691 INFO L226 Difference]: Without dead ends: 94 [2024-09-18 15:52:39,692 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 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 15:52:39,692 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:39,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:52:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-18 15:52:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-09-18 15:52:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-18 15:52:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-09-18 15:52:39,715 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 57 [2024-09-18 15:52:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:39,715 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-09-18 15:52:39,715 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-18 15:52:39,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-09-18 15:52:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-18 15:52:39,717 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:39,717 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1] [2024-09-18 15:52:39,736 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 15:52:39,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:39,920 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:39,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2145912741, now seen corresponding path program 1 times [2024-09-18 15:52:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032092821] [2024-09-18 15:52:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816851015] [2024-09-18 15:52:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:39,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:39,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:39,940 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 15:52:39,941 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 15:52:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:39,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:52:39,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:52:40,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-18 15:52:40,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032092821] [2024-09-18 15:52:40,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816851015] [2024-09-18 15:52:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816851015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:40,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:52:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-18 15:52:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000108635] [2024-09-18 15:52:40,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:40,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:52:40,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:40,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:52:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:52:40,376 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-18 15:52:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:41,180 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-18 15:52:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:52:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-09-18 15:52:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:41,182 INFO L225 Difference]: With dead ends: 136 [2024-09-18 15:52:41,182 INFO L226 Difference]: Without dead ends: 133 [2024-09-18 15:52:41,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:52:41,183 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:41,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:52:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-18 15:52:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-09-18 15:52:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 49 states have call successors, (49), 9 states have call predecessors, (49), 8 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-18 15:52:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2024-09-18 15:52:41,209 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 63 [2024-09-18 15:52:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:41,209 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2024-09-18 15:52:41,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-18 15:52:41,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2024-09-18 15:52:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-18 15:52:41,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:41,210 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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 15:52:41,223 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:41,414 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:41,415 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:41,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:41,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009882, now seen corresponding path program 2 times [2024-09-18 15:52:41,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:41,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804297872] [2024-09-18 15:52:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:41,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:41,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544492390] [2024-09-18 15:52:41,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:52:41,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:41,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:41,436 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 15:52:41,437 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 15:52:41,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:52:41,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:41,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-18 15:52:41,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-18 15:52:41,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-18 15:52:41,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:41,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804297872] [2024-09-18 15:52:41,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:41,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544492390] [2024-09-18 15:52:41,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544492390] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:41,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:52:41,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-18 15:52:41,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494802413] [2024-09-18 15:52:41,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:41,957 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:52:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:52:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:52:41,958 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-18 15:52:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:42,944 INFO L93 Difference]: Finished difference Result 243 states and 366 transitions. [2024-09-18 15:52:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 15:52:42,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 68 [2024-09-18 15:52:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:42,949 INFO L225 Difference]: With dead ends: 243 [2024-09-18 15:52:42,949 INFO L226 Difference]: Without dead ends: 241 [2024-09-18 15:52:42,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:52:42,950 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:42,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 287 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:52:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-18 15:52:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2024-09-18 15:52:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 112 states have internal predecessors, (137), 85 states have call successors, (85), 11 states have call predecessors, (85), 10 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2024-09-18 15:52:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 304 transitions. [2024-09-18 15:52:43,009 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 304 transitions. Word has length 68 [2024-09-18 15:52:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:43,009 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 304 transitions. [2024-09-18 15:52:43,009 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-18 15:52:43,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 304 transitions. [2024-09-18 15:52:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-18 15:52:43,010 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:43,010 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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 15:52:43,022 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 15:52:43,210 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:43,211 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:43,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1448853371, now seen corresponding path program 3 times [2024-09-18 15:52:43,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:43,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503793255] [2024-09-18 15:52:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:43,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:52:43,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979579444] [2024-09-18 15:52:43,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:52:43,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:43,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:43,228 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 15:52:43,229 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 15:52:43,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:52:43,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:43,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-18 15:52:43,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:52:44,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:58,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:58,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503793255] [2024-09-18 15:52:58,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:52:58,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979579444] [2024-09-18 15:52:58,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979579444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:58,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:52:58,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-18 15:52:58,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488248914] [2024-09-18 15:52:58,537 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:58,537 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 15:52:58,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:58,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 15:52:58,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:52:58,538 INFO L87 Difference]: Start difference. First operand 206 states and 304 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-18 15:53:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:00,236 INFO L93 Difference]: Finished difference Result 227 states and 327 transitions. [2024-09-18 15:53:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 15:53:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2024-09-18 15:53:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:00,238 INFO L225 Difference]: With dead ends: 227 [2024-09-18 15:53:00,239 INFO L226 Difference]: Without dead ends: 225 [2024-09-18 15:53:00,240 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:53:00,240 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:00,241 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:53:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-18 15:53:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2024-09-18 15:53:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 89 states have call successors, (89), 14 states have call predecessors, (89), 13 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-18 15:53:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 324 transitions. [2024-09-18 15:53:00,300 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 324 transitions. Word has length 73 [2024-09-18 15:53:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:00,300 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 324 transitions. [2024-09-18 15:53:00,300 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-18 15:53:00,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 324 transitions. [2024-09-18 15:53:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-18 15:53:00,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:00,302 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1] [2024-09-18 15:53:00,315 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 15:53:00,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-18 15:53:00,503 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:00,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash 910050682, now seen corresponding path program 1 times [2024-09-18 15:53:00,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:00,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369049018] [2024-09-18 15:53:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417232691] [2024-09-18 15:53:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:00,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:00,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:00,523 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 15:53:00,524 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 15:53:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:00,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-18 15:53:00,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-18 15:53:00,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-18 15:53:01,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369049018] [2024-09-18 15:53:01,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417232691] [2024-09-18 15:53:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417232691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:01,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:01,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-18 15:53:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310507627] [2024-09-18 15:53:01,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:01,554 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:53:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:53:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:53:01,555 INFO L87 Difference]: Start difference. First operand 224 states and 324 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 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 15:53:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:04,095 INFO L93 Difference]: Finished difference Result 353 states and 532 transitions. [2024-09-18 15:53:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-18 15:53:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 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 79 [2024-09-18 15:53:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:04,097 INFO L225 Difference]: With dead ends: 353 [2024-09-18 15:53:04,097 INFO L226 Difference]: Without dead ends: 349 [2024-09-18 15:53:04,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 15:53:04,098 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:04,098 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 609 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-18 15:53:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-18 15:53:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2024-09-18 15:53:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 181 states have internal predecessors, (225), 150 states have call successors, (150), 17 states have call predecessors, (150), 16 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-18 15:53:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2024-09-18 15:53:04,228 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 79 [2024-09-18 15:53:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:04,228 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2024-09-18 15:53:04,228 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 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 15:53:04,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2024-09-18 15:53:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-18 15:53:04,229 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:04,229 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:53:04,242 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:04,429 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 15:53:04,430 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:04,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash 623896260, now seen corresponding path program 1 times [2024-09-18 15:53:04,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:04,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679146214] [2024-09-18 15:53:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:04,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:04,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930215799] [2024-09-18 15:53:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:04,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:04,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:04,452 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 15:53:04,453 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 15:53:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:04,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-18 15:53:04,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-18 15:53:05,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:07,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679146214] [2024-09-18 15:53:07,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930215799] [2024-09-18 15:53:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930215799] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:07,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:07,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-18 15:53:07,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94445603] [2024-09-18 15:53:07,016 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:07,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:53:07,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:53:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:53:07,017 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-18 15:53:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:08,045 INFO L93 Difference]: Finished difference Result 358 states and 533 transitions. [2024-09-18 15:53:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 15:53:08,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 95 [2024-09-18 15:53:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:08,047 INFO L225 Difference]: With dead ends: 358 [2024-09-18 15:53:08,047 INFO L226 Difference]: Without dead ends: 356 [2024-09-18 15:53:08,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:53:08,048 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:08,048 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 369 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 15:53:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-09-18 15:53:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2024-09-18 15:53:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 184 states have (on average 1.2554347826086956) internal successors, (231), 187 states have internal predecessors, (231), 150 states have call successors, (150), 19 states have call predecessors, (150), 18 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-18 15:53:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 528 transitions. [2024-09-18 15:53:08,174 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 528 transitions. Word has length 95 [2024-09-18 15:53:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:08,174 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 528 transitions. [2024-09-18 15:53:08,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-18 15:53:08,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 528 transitions. [2024-09-18 15:53:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-18 15:53:08,175 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:08,176 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:08,190 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 15:53:08,376 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:08,376 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:08,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash 658114285, now seen corresponding path program 4 times [2024-09-18 15:53:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784228309] [2024-09-18 15:53:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:08,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:53:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:53:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:53:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:53:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:53:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:53:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:53:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:53:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:53:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:53:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 15:53:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 15:53:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-18 15:53:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-18 15:53:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-18 15:53:08,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:08,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784228309] [2024-09-18 15:53:08,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784228309] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:08,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:08,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160299786] [2024-09-18 15:53:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:08,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:08,476 INFO L87 Difference]: Start difference. First operand 353 states and 528 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-18 15:53:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:08,602 INFO L93 Difference]: Finished difference Result 426 states and 629 transitions. [2024-09-18 15:53:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:53:08,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2024-09-18 15:53:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:08,604 INFO L225 Difference]: With dead ends: 426 [2024-09-18 15:53:08,604 INFO L226 Difference]: Without dead ends: 230 [2024-09-18 15:53:08,605 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 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 15:53:08,605 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:08,606 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-18 15:53:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2024-09-18 15:53:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 78 states have call successors, (78), 19 states have call predecessors, (78), 18 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-18 15:53:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 279 transitions. [2024-09-18 15:53:08,673 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 279 transitions. Word has length 98 [2024-09-18 15:53:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:08,673 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 279 transitions. [2024-09-18 15:53:08,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-18 15:53:08,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 279 transitions. [2024-09-18 15:53:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-18 15:53:08,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:08,674 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:08,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-18 15:53:08,674 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:08,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:08,674 INFO L85 PathProgramCache]: Analyzing trace with hash -825105347, now seen corresponding path program 1 times [2024-09-18 15:53:08,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:08,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148109450] [2024-09-18 15:53:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:08,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:53:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:53:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:53:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:53:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:53:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:53:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-18 15:53:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:53:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:53:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:53:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:53:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 15:53:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:53:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:53:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 15:53:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-18 15:53:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 15:53:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-18 15:53:08,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:08,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148109450] [2024-09-18 15:53:08,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148109450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:08,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243094723] [2024-09-18 15:53:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:08,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:08,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:08,789 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 15:53:08,790 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 15:53:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:08,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:53:08,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-09-18 15:53:08,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-18 15:53:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243094723] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:08,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-18 15:53:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987084809] [2024-09-18 15:53:08,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:08,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:53:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:53:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:53:08,939 INFO L87 Difference]: Start difference. First operand 206 states and 279 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-18 15:53:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:09,189 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2024-09-18 15:53:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 15:53:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 109 [2024-09-18 15:53:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:09,191 INFO L225 Difference]: With dead ends: 232 [2024-09-18 15:53:09,191 INFO L226 Difference]: Without dead ends: 220 [2024-09-18 15:53:09,191 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:53:09,191 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 17 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:09,191 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 307 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-18 15:53:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2024-09-18 15:53:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 106 states have (on average 1.150943396226415) internal successors, (122), 108 states have internal predecessors, (122), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-09-18 15:53:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2024-09-18 15:53:09,266 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 109 [2024-09-18 15:53:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:09,266 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2024-09-18 15:53:09,266 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-18 15:53:09,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2024-09-18 15:53:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-18 15:53:09,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:09,267 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:09,280 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:09,467 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:53:09,467 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:09,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash 429591308, now seen corresponding path program 2 times [2024-09-18 15:53:09,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:09,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113927890] [2024-09-18 15:53:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:09,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:09,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678171489] [2024-09-18 15:53:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:09,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:09,483 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 15:53:09,485 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 15:53:09,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:09,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:09,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 15:53:09,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-09-18 15:53:09,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:10,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113927890] [2024-09-18 15:53:10,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:10,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678171489] [2024-09-18 15:53:10,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678171489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:10,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:10,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-18 15:53:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827036585] [2024-09-18 15:53:10,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:10,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:53:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:53:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:53:10,185 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-18 15:53:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:10,928 INFO L93 Difference]: Finished difference Result 231 states and 316 transitions. [2024-09-18 15:53:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 15:53:10,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2024-09-18 15:53:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:10,930 INFO L225 Difference]: With dead ends: 231 [2024-09-18 15:53:10,930 INFO L226 Difference]: Without dead ends: 229 [2024-09-18 15:53:10,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:53:10,931 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:10,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 428 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:53:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-18 15:53:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2024-09-18 15:53:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-18 15:53:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2024-09-18 15:53:11,013 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 110 [2024-09-18 15:53:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:11,013 INFO L474 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2024-09-18 15:53:11,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-18 15:53:11,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2024-09-18 15:53:11,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-18 15:53:11,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:11,015 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:11,028 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:11,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 15:53:11,215 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:11,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1625892333, now seen corresponding path program 3 times [2024-09-18 15:53:11,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:11,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313641073] [2024-09-18 15:53:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:11,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601658063] [2024-09-18 15:53:11,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:53:11,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:11,231 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 15:53:11,233 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 15:53:11,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:53:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:11,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-18 15:53:11,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-09-18 15:53:11,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-09-18 15:53:12,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313641073] [2024-09-18 15:53:12,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601658063] [2024-09-18 15:53:12,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601658063] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:12,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:12,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-09-18 15:53:12,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6592716] [2024-09-18 15:53:12,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:12,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:53:12,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:53:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:53:12,863 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-18 15:53:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:15,224 INFO L93 Difference]: Finished difference Result 267 states and 364 transitions. [2024-09-18 15:53:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 15:53:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2024-09-18 15:53:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:15,226 INFO L225 Difference]: With dead ends: 267 [2024-09-18 15:53:15,226 INFO L226 Difference]: Without dead ends: 265 [2024-09-18 15:53:15,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:53:15,226 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:15,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 482 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 15:53:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-18 15:53:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2024-09-18 15:53:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 101 states have call successors, (101), 22 states have call predecessors, (101), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-18 15:53:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 359 transitions. [2024-09-18 15:53:15,337 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 359 transitions. Word has length 115 [2024-09-18 15:53:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:15,337 INFO L474 AbstractCegarLoop]: Abstraction has 262 states and 359 transitions. [2024-09-18 15:53:15,338 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-18 15:53:15,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 359 transitions. [2024-09-18 15:53:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-18 15:53:15,340 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:15,340 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:15,355 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-18 15:53:15,546 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 15:53:15,547 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:15,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 34587587, now seen corresponding path program 4 times [2024-09-18 15:53:15,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:15,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698739039] [2024-09-18 15:53:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:15,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:15,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447023821] [2024-09-18 15:53:15,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:53:15,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:15,571 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 15:53:15,572 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 15:53:15,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:53:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:15,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:53:15,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-18 15:53:16,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:16,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698739039] [2024-09-18 15:53:16,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447023821] [2024-09-18 15:53:16,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447023821] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:16,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:16,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-18 15:53:16,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614704767] [2024-09-18 15:53:16,606 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:16,607 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:53:16,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:53:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:53:16,607 INFO L87 Difference]: Start difference. First operand 262 states and 359 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-18 15:53:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:17,629 INFO L93 Difference]: Finished difference Result 295 states and 404 transitions. [2024-09-18 15:53:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:53:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2024-09-18 15:53:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:17,631 INFO L225 Difference]: With dead ends: 295 [2024-09-18 15:53:17,631 INFO L226 Difference]: Without dead ends: 293 [2024-09-18 15:53:17,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:53:17,633 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:17,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 452 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:53:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-18 15:53:17,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2024-09-18 15:53:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 146 states have internal predecessors, (164), 104 states have call successors, (104), 22 states have call predecessors, (104), 21 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-18 15:53:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 369 transitions. [2024-09-18 15:53:17,749 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 369 transitions. Word has length 117 [2024-09-18 15:53:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:17,749 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 369 transitions. [2024-09-18 15:53:17,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-18 15:53:17,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 369 transitions. [2024-09-18 15:53:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-18 15:53:17,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:17,751 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:17,762 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:17,951 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 15:53:17,951 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:17,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1783402708, now seen corresponding path program 5 times [2024-09-18 15:53:17,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:17,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882297068] [2024-09-18 15:53:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:17,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996772274] [2024-09-18 15:53:17,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:53:17,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:17,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:17,971 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 15:53:17,971 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 15:53:18,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-18 15:53:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:18,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-18 15:53:18,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-18 15:53:18,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:39,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:39,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882297068] [2024-09-18 15:53:39,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996772274] [2024-09-18 15:53:39,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996772274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:39,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:39,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-18 15:53:39,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141784512] [2024-09-18 15:53:39,468 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:39,468 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:53:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:53:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=722, Unknown=2, NotChecked=0, Total=870 [2024-09-18 15:53:39,469 INFO L87 Difference]: Start difference. First operand 269 states and 369 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-18 15:53:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:40,249 INFO L93 Difference]: Finished difference Result 285 states and 382 transitions. [2024-09-18 15:53:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 15:53:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 120 [2024-09-18 15:53:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:40,251 INFO L225 Difference]: With dead ends: 285 [2024-09-18 15:53:40,251 INFO L226 Difference]: Without dead ends: 283 [2024-09-18 15:53:40,252 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=235, Invalid=1095, Unknown=2, NotChecked=0, Total=1332 [2024-09-18 15:53:40,252 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:40,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:53:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-18 15:53:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2024-09-18 15:53:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 152 states have (on average 1.138157894736842) internal successors, (173), 155 states have internal predecessors, (173), 104 states have call successors, (104), 25 states have call predecessors, (104), 24 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-18 15:53:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2024-09-18 15:53:40,372 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 120 [2024-09-18 15:53:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:40,372 INFO L474 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2024-09-18 15:53:40,372 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-18 15:53:40,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2024-09-18 15:53:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-18 15:53:40,374 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:40,374 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 15:53:40,383 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 15:53:40,574 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:40,575 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:40,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2078513889, now seen corresponding path program 2 times [2024-09-18 15:53:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619542450] [2024-09-18 15:53:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835235161] [2024-09-18 15:53:40,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:40,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:40,593 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 15:53:40,594 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 15:53:40,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:40,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:40,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-18 15:53:40,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-18 15:53:41,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-18 15:53:42,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619542450] [2024-09-18 15:53:42,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835235161] [2024-09-18 15:53:42,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835235161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:42,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:42,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-09-18 15:53:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409762766] [2024-09-18 15:53:42,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:42,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 15:53:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 15:53:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:53:42,488 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-18 15:53:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:47,778 INFO L93 Difference]: Finished difference Result 414 states and 593 transitions. [2024-09-18 15:53:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 15:53:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 126 [2024-09-18 15:53:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:47,780 INFO L225 Difference]: With dead ends: 414 [2024-09-18 15:53:47,780 INFO L226 Difference]: Without dead ends: 412 [2024-09-18 15:53:47,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=569, Invalid=2401, Unknown=0, NotChecked=0, Total=2970 [2024-09-18 15:53:47,782 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:47,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 591 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-18 15:53:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-09-18 15:53:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 392. [2024-09-18 15:53:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 202 states have (on average 1.183168316831683) internal successors, (239), 205 states have internal predecessors, (239), 162 states have call successors, (162), 28 states have call predecessors, (162), 27 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2024-09-18 15:53:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 560 transitions. [2024-09-18 15:53:48,018 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 560 transitions. Word has length 126 [2024-09-18 15:53:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:48,019 INFO L474 AbstractCegarLoop]: Abstraction has 392 states and 560 transitions. [2024-09-18 15:53:48,019 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-18 15:53:48,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 560 transitions. [2024-09-18 15:53:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-18 15:53:48,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:48,020 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 15:53:48,032 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:48,220 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:48,221 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:48,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash -627102050, now seen corresponding path program 2 times [2024-09-18 15:53:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109534976] [2024-09-18 15:53:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:48,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174811634] [2024-09-18 15:53:48,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:48,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:48,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:48,234 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 15:53:48,240 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 15:53:48,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:48,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:48,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-18 15:53:48,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-09-18 15:53:48,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-18 15:53:49,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:49,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109534976] [2024-09-18 15:53:49,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:49,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174811634] [2024-09-18 15:53:49,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174811634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:49,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:49,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-18 15:53:49,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541347270] [2024-09-18 15:53:49,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:49,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-18 15:53:49,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:49,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-18 15:53:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:53:49,119 INFO L87 Difference]: Start difference. First operand 392 states and 560 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-18 15:53:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:51,838 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2024-09-18 15:53:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-18 15:53:51,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 131 [2024-09-18 15:53:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:51,840 INFO L225 Difference]: With dead ends: 415 [2024-09-18 15:53:51,840 INFO L226 Difference]: Without dead ends: 405 [2024-09-18 15:53:51,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 15:53:51,841 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 67 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:51,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 695 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 15:53:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-18 15:53:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 395. [2024-09-18 15:53:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 206 states have internal predecessors, (238), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-09-18 15:53:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2024-09-18 15:53:52,087 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 131 [2024-09-18 15:53:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:52,087 INFO L474 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2024-09-18 15:53:52,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-18 15:53:52,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2024-09-18 15:53:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-18 15:53:52,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:52,088 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:52,103 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 15:53:52,289 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:52,289 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:52,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 231977005, now seen corresponding path program 6 times [2024-09-18 15:53:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:52,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024108167] [2024-09-18 15:53:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:52,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:52,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210860631] [2024-09-18 15:53:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:53:52,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:52,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:52,306 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 15:53:52,308 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 15:53:52,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 15:53:52,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:52,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-18 15:53:52,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-09-18 15:53:55,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:10,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024108167] [2024-09-18 15:54:10,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210860631] [2024-09-18 15:54:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210860631] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:10,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:54:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-18 15:54:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859226037] [2024-09-18 15:54:10,650 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:10,650 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:54:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:54:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=642, Unknown=3, NotChecked=0, Total=756 [2024-09-18 15:54:10,651 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 15:54:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:14,655 INFO L93 Difference]: Finished difference Result 440 states and 609 transitions. [2024-09-18 15:54:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 15:54:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 132 [2024-09-18 15:54:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:14,657 INFO L225 Difference]: With dead ends: 440 [2024-09-18 15:54:14,657 INFO L226 Difference]: Without dead ends: 438 [2024-09-18 15:54:14,658 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=180, Invalid=939, Unknown=3, NotChecked=0, Total=1122 [2024-09-18 15:54:14,658 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:14,658 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 476 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-18 15:54:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-18 15:54:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2024-09-18 15:54:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 226 states have (on average 1.154867256637168) internal successors, (261), 227 states have internal predecessors, (261), 171 states have call successors, (171), 35 states have call predecessors, (171), 34 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-18 15:54:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 601 transitions. [2024-09-18 15:54:14,937 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 601 transitions. Word has length 132 [2024-09-18 15:54:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:14,938 INFO L474 AbstractCegarLoop]: Abstraction has 432 states and 601 transitions. [2024-09-18 15:54:14,938 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 15:54:14,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 601 transitions. [2024-09-18 15:54:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-18 15:54:14,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:14,939 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:14,945 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 15:54:15,139 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-18 15:54:15,140 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:15,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash -456505470, now seen corresponding path program 7 times [2024-09-18 15:54:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:15,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106613209] [2024-09-18 15:54:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:15,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:15,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134645220] [2024-09-18 15:54:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:54:15,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:15,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:15,163 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 15:54:15,164 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 15:54:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:15,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-18 15:54:15,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 132 proven. 75 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-09-18 15:54:16,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:16,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:16,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106613209] [2024-09-18 15:54:16,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:16,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134645220] [2024-09-18 15:54:16,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134645220] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:16,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:54:16,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-18 15:54:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921350440] [2024-09-18 15:54:16,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:16,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:54:16,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:54:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:54:16,572 INFO L87 Difference]: Start difference. First operand 432 states and 601 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-18 15:54:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:17,554 INFO L93 Difference]: Finished difference Result 466 states and 646 transitions. [2024-09-18 15:54:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:54:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 139 [2024-09-18 15:54:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:17,557 INFO L225 Difference]: With dead ends: 466 [2024-09-18 15:54:17,557 INFO L226 Difference]: Without dead ends: 464 [2024-09-18 15:54:17,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2024-09-18 15:54:17,558 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:17,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 465 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:54:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-09-18 15:54:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2024-09-18 15:54:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 242 states have internal predecessors, (278), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-18 15:54:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 642 transitions. [2024-09-18 15:54:17,848 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 642 transitions. Word has length 139 [2024-09-18 15:54:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:17,848 INFO L474 AbstractCegarLoop]: Abstraction has 462 states and 642 transitions. [2024-09-18 15:54:17,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-18 15:54:17,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 642 transitions. [2024-09-18 15:54:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-18 15:54:17,849 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:17,849 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:17,861 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 15:54:18,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-18 15:54:18,050 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:18,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1541639723, now seen corresponding path program 8 times [2024-09-18 15:54:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:18,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36398990] [2024-09-18 15:54:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204839292] [2024-09-18 15:54:18,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:54:18,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:18,068 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 15:54:18,069 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 15:54:18,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:54:18,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:18,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-18 15:54:18,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 96 proven. 107 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-18 15:54:19,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:48,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36398990] [2024-09-18 15:54:48,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204839292] [2024-09-18 15:54:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204839292] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:48,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:54:48,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-18 15:54:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624470646] [2024-09-18 15:54:48,471 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:48,472 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 15:54:48,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 15:54:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=559, Unknown=3, NotChecked=0, Total=702 [2024-09-18 15:54:48,472 INFO L87 Difference]: Start difference. First operand 462 states and 642 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-18 15:54:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:49,724 INFO L93 Difference]: Finished difference Result 472 states and 651 transitions. [2024-09-18 15:54:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:54:49,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 142 [2024-09-18 15:54:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:49,727 INFO L225 Difference]: With dead ends: 472 [2024-09-18 15:54:49,727 INFO L226 Difference]: Without dead ends: 470 [2024-09-18 15:54:49,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=243, Invalid=944, Unknown=3, NotChecked=0, Total=1190 [2024-09-18 15:54:49,728 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:49,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:54:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-09-18 15:54:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 466. [2024-09-18 15:54:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 244 states have (on average 1.151639344262295) internal successors, (281), 245 states have internal predecessors, (281), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-18 15:54:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 645 transitions. [2024-09-18 15:54:50,022 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 645 transitions. Word has length 142 [2024-09-18 15:54:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:50,022 INFO L474 AbstractCegarLoop]: Abstraction has 466 states and 645 transitions. [2024-09-18 15:54:50,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-18 15:54:50,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 645 transitions. [2024-09-18 15:54:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-18 15:54:50,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:50,024 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:50,036 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-18 15:54:50,224 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:50,224 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:50,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1016913677, now seen corresponding path program 9 times [2024-09-18 15:54:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:50,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449391572] [2024-09-18 15:54:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:50,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880555441] [2024-09-18 15:54:50,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:54:50,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:50,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:50,239 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 15:54:50,240 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 15:54:50,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:54:50,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:50,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-18 15:54:50,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 97 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-09-18 15:54:52,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:52,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449391572] [2024-09-18 15:54:52,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880555441] [2024-09-18 15:54:52,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880555441] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:52,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:54:52,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-18 15:54:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876415723] [2024-09-18 15:54:52,602 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:52,602 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:54:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:54:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:54:52,603 INFO L87 Difference]: Start difference. First operand 466 states and 645 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 15:54:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:54,122 INFO L93 Difference]: Finished difference Result 486 states and 662 transitions. [2024-09-18 15:54:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:54:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 142 [2024-09-18 15:54:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:54,124 INFO L225 Difference]: With dead ends: 486 [2024-09-18 15:54:54,124 INFO L226 Difference]: Without dead ends: 484 [2024-09-18 15:54:54,125 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:54:54,125 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:54,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 541 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-18 15:54:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-18 15:54:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2024-09-18 15:54:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1462450592885376) internal successors, (290), 254 states have internal predecessors, (290), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-18 15:54:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 654 transitions. [2024-09-18 15:54:54,419 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 654 transitions. Word has length 142 [2024-09-18 15:54:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:54,420 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 654 transitions. [2024-09-18 15:54:54,420 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 15:54:54,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 654 transitions. [2024-09-18 15:54:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-18 15:54:54,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:54,421 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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 15:54:54,433 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 15:54:54,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-18 15:54:54,621 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:54,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1445963081, now seen corresponding path program 3 times [2024-09-18 15:54:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:54,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051895545] [2024-09-18 15:54:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:54,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673334262] [2024-09-18 15:54:54,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:54:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:54,634 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 15:54:54,635 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 15:54:54,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:54:54,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:54,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:54:54,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 95 proven. 37 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-09-18 15:54:55,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:55:00,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:55:00,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051895545] [2024-09-18 15:55:00,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:55:00,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673334262] [2024-09-18 15:55:00,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673334262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:55:00,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:55:00,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-18 15:55:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805500101] [2024-09-18 15:55:00,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:55:00,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:55:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:55:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:55:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-18 15:55:00,412 INFO L87 Difference]: Start difference. First operand 478 states and 654 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 15:55:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:55:01,057 INFO L93 Difference]: Finished difference Result 488 states and 663 transitions. [2024-09-18 15:55:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:55:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 145 [2024-09-18 15:55:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:55:01,060 INFO L225 Difference]: With dead ends: 488 [2024-09-18 15:55:01,060 INFO L226 Difference]: Without dead ends: 481 [2024-09-18 15:55:01,060 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-18 15:55:01,060 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:55:01,061 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 233 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:55:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-18 15:55:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2024-09-18 15:55:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1422924901185771) internal successors, (289), 254 states have internal predecessors, (289), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-18 15:55:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 653 transitions. [2024-09-18 15:55:01,366 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 653 transitions. Word has length 145 [2024-09-18 15:55:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:55:01,366 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 653 transitions. [2024-09-18 15:55:01,367 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 15:55:01,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 653 transitions. [2024-09-18 15:55:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-09-18 15:55:01,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:55:01,368 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:55:01,380 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 15:55:01,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-18 15:55:01,569 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:55:01,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:01,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1961731402, now seen corresponding path program 10 times [2024-09-18 15:55:01,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:55:01,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366764323] [2024-09-18 15:55:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:55:01,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:55:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:55:01,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019611342] [2024-09-18 15:55:01,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:55:01,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:55:01,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:55:01,588 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 15:55:01,589 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 15:55:01,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:55:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:55:01,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 15:55:01,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:55:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 95 proven. 89 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2024-09-18 15:55:02,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:55:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 123 proven. 7 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-09-18 15:55:02,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:55:02,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366764323] [2024-09-18 15:55:02,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:55:02,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019611342] [2024-09-18 15:55:02,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019611342] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:55:02,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:55:02,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2024-09-18 15:55:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629199381] [2024-09-18 15:55:02,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:55:02,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:55:02,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:55:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:55:02,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:55:02,382 INFO L87 Difference]: Start difference. First operand 478 states and 653 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-18 15:55:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:55:05,245 INFO L93 Difference]: Finished difference Result 501 states and 679 transitions. [2024-09-18 15:55:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:55:05,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 154 [2024-09-18 15:55:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:55:05,247 INFO L225 Difference]: With dead ends: 501 [2024-09-18 15:55:05,247 INFO L226 Difference]: Without dead ends: 499 [2024-09-18 15:55:05,248 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2024-09-18 15:55:05,248 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:55:05,248 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-18 15:55:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-18 15:55:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 486. [2024-09-18 15:55:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 259 states have (on average 1.138996138996139) internal successors, (295), 260 states have internal predecessors, (295), 183 states have call successors, (183), 44 states have call predecessors, (183), 43 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-18 15:55:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 659 transitions. [2024-09-18 15:55:05,564 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 659 transitions. Word has length 154 [2024-09-18 15:55:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:55:05,564 INFO L474 AbstractCegarLoop]: Abstraction has 486 states and 659 transitions. [2024-09-18 15:55:05,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-18 15:55:05,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 659 transitions. [2024-09-18 15:55:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-18 15:55:05,566 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:55:05,566 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:55:05,584 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 15:55:05,766 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-18 15:55:05,766 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:55:05,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1660634611, now seen corresponding path program 11 times [2024-09-18 15:55:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:55:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104731959] [2024-09-18 15:55:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:55:05,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:55:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:55:05,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289590540] [2024-09-18 15:55:05,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:55:05,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:55:05,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:55:05,785 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 15:55:05,787 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 15:55:06,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-18 15:55:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:55:06,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-18 15:55:06,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:55:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-18 15:55:06,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:55:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-18 15:55:07,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:55:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104731959] [2024-09-18 15:55:07,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:55:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289590540] [2024-09-18 15:55:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289590540] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:55:07,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:55:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-09-18 15:55:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643349520] [2024-09-18 15:55:07,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:55:07,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 15:55:07,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:55:07,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 15:55:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:55:07,307 INFO L87 Difference]: Start difference. First operand 486 states and 659 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-18 15:55:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:55:08,789 INFO L93 Difference]: Finished difference Result 523 states and 714 transitions. [2024-09-18 15:55:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 15:55:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 159 [2024-09-18 15:55:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:55:08,792 INFO L225 Difference]: With dead ends: 523 [2024-09-18 15:55:08,792 INFO L226 Difference]: Without dead ends: 521 [2024-09-18 15:55:08,792 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 15:55:08,793 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:55:08,793 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 625 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:55:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-09-18 15:55:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 490. [2024-09-18 15:55:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 262 states have (on average 1.1374045801526718) internal successors, (298), 263 states have internal predecessors, (298), 183 states have call successors, (183), 45 states have call predecessors, (183), 44 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-18 15:55:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 662 transitions. [2024-09-18 15:55:09,149 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 662 transitions. Word has length 159 [2024-09-18 15:55:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:55:09,149 INFO L474 AbstractCegarLoop]: Abstraction has 490 states and 662 transitions. [2024-09-18 15:55:09,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-18 15:55:09,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 662 transitions. [2024-09-18 15:55:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-09-18 15:55:09,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:55:09,151 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:55:09,158 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-18 15:55:09,351 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-18 15:55:09,351 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:55:09,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1550967297, now seen corresponding path program 12 times [2024-09-18 15:55:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:55:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019487261] [2024-09-18 15:55:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:55:09,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:55:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:55:09,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223399921] [2024-09-18 15:55:09,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:55:09,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:55:09,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:55:09,372 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 15:55:09,373 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 15:55:09,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 15:55:09,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:55:09,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-18 15:55:09,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:55:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2024-09-18 15:55:10,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:55:10,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:55:10,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019487261] [2024-09-18 15:55:10,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:55:10,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223399921] [2024-09-18 15:55:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223399921] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:55:10,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:55:10,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-18 15:55:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807879172] [2024-09-18 15:55:10,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:55:10,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 15:55:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:55:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 15:55:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:55:10,344 INFO L87 Difference]: Start difference. First operand 490 states and 662 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-18 15:55:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:55:11,072 INFO L93 Difference]: Finished difference Result 502 states and 672 transitions. [2024-09-18 15:55:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 15:55:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 161 [2024-09-18 15:55:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:55:11,075 INFO L225 Difference]: With dead ends: 502 [2024-09-18 15:55:11,075 INFO L226 Difference]: Without dead ends: 500 [2024-09-18 15:55:11,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:55:11,076 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:55:11,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 287 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:55:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-09-18 15:55:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 459. [2024-09-18 15:55:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 249 states have internal predecessors, (281), 167 states have call successors, (167), 44 states have call predecessors, (167), 43 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-18 15:55:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 613 transitions. [2024-09-18 15:55:11,410 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 613 transitions. Word has length 161 [2024-09-18 15:55:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:55:11,410 INFO L474 AbstractCegarLoop]: Abstraction has 459 states and 613 transitions. [2024-09-18 15:55:11,410 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-18 15:55:11,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 613 transitions. [2024-09-18 15:55:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-18 15:55:11,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:55:11,411 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:55:11,417 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 15:55:11,611 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:55:11,612 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:55:11,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:55:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash 359715818, now seen corresponding path program 13 times [2024-09-18 15:55:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:55:11,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173429962] [2024-09-18 15:55:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:55:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:55:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:55:11,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802824319] [2024-09-18 15:55:11,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:55:11,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:55:11,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:55:11,628 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 15:55:11,629 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 15:55:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:55:11,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-18 15:55:11,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:55:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 116 proven. 157 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2024-09-18 15:55:13,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:56:08,268 WARN L293 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:56:08,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:56:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173429962] [2024-09-18 15:56:08,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:56:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802824319] [2024-09-18 15:56:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802824319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:56:08,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:56:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-18 15:56:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320270428] [2024-09-18 15:56:08,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:56:08,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:56:08,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:56:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:56:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=931, Unknown=3, NotChecked=0, Total=1122 [2024-09-18 15:56:08,271 INFO L87 Difference]: Start difference. First operand 459 states and 613 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-18 15:56:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:56:09,399 INFO L93 Difference]: Finished difference Result 483 states and 639 transitions. [2024-09-18 15:56:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 15:56:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-18 15:56:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:56:09,402 INFO L225 Difference]: With dead ends: 483 [2024-09-18 15:56:09,402 INFO L226 Difference]: Without dead ends: 481 [2024-09-18 15:56:09,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=294, Invalid=1425, Unknown=3, NotChecked=0, Total=1722 [2024-09-18 15:56:09,403 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:56:09,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 409 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:56:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-18 15:56:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2024-09-18 15:56:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 259 states have (on average 1.1312741312741312) internal successors, (293), 260 states have internal predecessors, (293), 171 states have call successors, (171), 47 states have call predecessors, (171), 46 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-18 15:56:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 633 transitions. [2024-09-18 15:56:09,745 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 633 transitions. Word has length 164 [2024-09-18 15:56:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:56:09,746 INFO L474 AbstractCegarLoop]: Abstraction has 477 states and 633 transitions. [2024-09-18 15:56:09,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-18 15:56:09,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 633 transitions. [2024-09-18 15:56:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-18 15:56:09,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:56:09,747 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:56:09,760 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-18 15:56:09,948 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-18 15:56:09,948 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:56:09,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1256755380, now seen corresponding path program 14 times [2024-09-18 15:56:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:56:09,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12502098] [2024-09-18 15:56:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:56:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:56:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:56:09,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349909368] [2024-09-18 15:56:09,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:56:09,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:09,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:56:09,974 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:56:09,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-18 15:56:10,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:56:10,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:56:10,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-18 15:56:10,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:56:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 210 proven. 156 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2024-09-18 15:56:14,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:56:15,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:56:15,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12502098] [2024-09-18 15:56:15,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:56:15,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349909368] [2024-09-18 15:56:15,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349909368] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:56:15,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:56:15,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-18 15:56:15,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248537394] [2024-09-18 15:56:15,180 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:56:15,180 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 15:56:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:56:15,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 15:56:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:56:15,181 INFO L87 Difference]: Start difference. First operand 477 states and 633 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-18 15:56:21,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-18 15:56:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:56:21,921 INFO L93 Difference]: Finished difference Result 526 states and 697 transitions. [2024-09-18 15:56:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 15:56:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-18 15:56:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:56:21,924 INFO L225 Difference]: With dead ends: 526 [2024-09-18 15:56:21,924 INFO L226 Difference]: Without dead ends: 524 [2024-09-18 15:56:21,924 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-09-18 15:56:21,925 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:56:21,925 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 812 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-18 15:56:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-09-18 15:56:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 514. [2024-09-18 15:56:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 280 states have (on average 1.1285714285714286) internal successors, (316), 281 states have internal predecessors, (316), 183 states have call successors, (183), 51 states have call predecessors, (183), 50 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-18 15:56:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 680 transitions. [2024-09-18 15:56:22,299 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 680 transitions. Word has length 164 [2024-09-18 15:56:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:56:22,299 INFO L474 AbstractCegarLoop]: Abstraction has 514 states and 680 transitions. [2024-09-18 15:56:22,299 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-18 15:56:22,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 680 transitions. [2024-09-18 15:56:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-09-18 15:56:22,301 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:56:22,301 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:56:22,313 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-18 15:56:22,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:22,501 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:56:22,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1039525467, now seen corresponding path program 15 times [2024-09-18 15:56:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:56:22,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37972814] [2024-09-18 15:56:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:56:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:56:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:56:22,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788462858] [2024-09-18 15:56:22,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:56:22,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:22,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:56:22,523 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:56:22,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-18 15:56:22,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:56:22,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:56:22,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:56:22,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:56:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 174 proven. 32 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-09-18 15:56:25,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:56:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:56:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37972814] [2024-09-18 15:56:25,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:56:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788462858] [2024-09-18 15:56:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788462858] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:56:25,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:56:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-18 15:56:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596974185] [2024-09-18 15:56:25,278 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:56:25,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:56:25,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:56:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:56:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:56:25,279 INFO L87 Difference]: Start difference. First operand 514 states and 680 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 15:56:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:56:27,795 INFO L93 Difference]: Finished difference Result 574 states and 765 transitions. [2024-09-18 15:56:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:56:27,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 167 [2024-09-18 15:56:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:56:27,798 INFO L225 Difference]: With dead ends: 574 [2024-09-18 15:56:27,798 INFO L226 Difference]: Without dead ends: 572 [2024-09-18 15:56:27,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:56:27,799 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:56:27,799 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 486 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:56:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-18 15:56:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2024-09-18 15:56:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 307 states have (on average 1.1302931596091206) internal successors, (347), 308 states have internal predecessors, (347), 207 states have call successors, (207), 54 states have call predecessors, (207), 53 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-18 15:56:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 759 transitions. [2024-09-18 15:56:28,237 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 759 transitions. Word has length 167 [2024-09-18 15:56:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:56:28,238 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 759 transitions. [2024-09-18 15:56:28,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-18 15:56:28,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 759 transitions. [2024-09-18 15:56:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-18 15:56:28,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:56:28,239 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:56:28,252 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-18 15:56:28,439 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:28,439 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:56:28,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash 487523073, now seen corresponding path program 4 times [2024-09-18 15:56:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:56:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403603402] [2024-09-18 15:56:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:56:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:56:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:56:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587469992] [2024-09-18 15:56:28,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:56:28,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:28,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:56:28,461 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:56:28,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-18 15:56:28,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:56:28,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:56:28,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-18 15:56:28,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:56:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 113 proven. 110 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-18 15:56:29,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:56:35,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:56:35,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403603402] [2024-09-18 15:56:35,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:56:35,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587469992] [2024-09-18 15:56:35,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587469992] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:56:35,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:56:35,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-18 15:56:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724533310] [2024-09-18 15:56:35,924 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:56:35,924 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:56:35,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:56:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:56:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=935, Unknown=1, NotChecked=0, Total=1056 [2024-09-18 15:56:35,925 INFO L87 Difference]: Start difference. First operand 568 states and 759 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-18 15:56:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:56:37,749 INFO L93 Difference]: Finished difference Result 628 states and 839 transitions. [2024-09-18 15:56:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 15:56:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 170 [2024-09-18 15:56:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:56:37,752 INFO L225 Difference]: With dead ends: 628 [2024-09-18 15:56:37,752 INFO L226 Difference]: Without dead ends: 621 [2024-09-18 15:56:37,753 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=204, Invalid=1517, Unknown=1, NotChecked=0, Total=1722 [2024-09-18 15:56:37,753 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:56:37,753 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 490 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:56:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-09-18 15:56:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 596. [2024-09-18 15:56:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 323 states have (on average 1.130030959752322) internal successors, (365), 324 states have internal predecessors, (365), 215 states have call successors, (215), 58 states have call predecessors, (215), 57 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2024-09-18 15:56:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 793 transitions. [2024-09-18 15:56:38,209 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 793 transitions. Word has length 170 [2024-09-18 15:56:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:56:38,209 INFO L474 AbstractCegarLoop]: Abstraction has 596 states and 793 transitions. [2024-09-18 15:56:38,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-18 15:56:38,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 793 transitions. [2024-09-18 15:56:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-18 15:56:38,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:56:38,211 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:56:38,223 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-18 15:56:38,411 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-18 15:56:38,411 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:56:38,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:56:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1959567971, now seen corresponding path program 5 times [2024-09-18 15:56:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:56:38,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90151812] [2024-09-18 15:56:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:56:38,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:56:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:56:38,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367491979] [2024-09-18 15:56:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:56:38,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:56:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:56:38,425 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:56:38,426 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-18 15:56:38,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-18 15:56:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:56:38,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-18 15:56:38,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:57:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 133 proven. 144 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2024-09-18 15:57:05,944 INFO L327 TraceCheckSpWp]: Computing backward predicates...