./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.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 fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 00:26:27,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 00:26:27,912 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 00:26:27,916 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 00:26:27,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 00:26:27,940 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 00:26:27,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 00:26:27,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 00:26:27,943 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 00:26:27,944 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 00:26:27,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 00:26:27,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 00:26:27,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 00:26:27,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 00:26:27,947 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 00:26:27,947 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 00:26:27,947 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 00:26:27,947 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 00:26:27,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 00:26:27,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 00:26:27,948 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 00:26:27,948 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 00:26:27,949 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 00:26:27,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 00:26:27,949 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 00:26:27,949 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 00:26:27,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 00:26:27,949 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 00:26:27,950 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 00:26:27,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 00:26:27,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 00:26:27,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 00:26:27,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:26:27,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 00:26:27,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 00:26:27,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 00:26:27,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 00:26:27,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 00:26:27,951 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 00:26:27,951 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 00:26:27,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 00:26:27,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 00:26:27,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 00:26:28,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 00:26:28,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 00:26:28,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 00:26:28,228 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 00:26:28,230 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 00:26:28,231 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2024-09-13 00:26:29,481 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 00:26:29,646 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 00:26:29,647 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2024-09-13 00:26:29,654 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f006df6c9/27b7b596c4ff43eb9ed2dee9c890446a/FLAG3ef6a6eb0 [2024-09-13 00:26:29,671 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f006df6c9/27b7b596c4ff43eb9ed2dee9c890446a [2024-09-13 00:26:29,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 00:26:29,677 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 00:26:29,678 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 00:26:29,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 00:26:29,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 00:26:29,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556422e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29, skipping insertion in model container [2024-09-13 00:26:29,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,705 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 00:26:29,847 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2024-09-13 00:26:29,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:26:29,881 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 00:26:29,892 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2024-09-13 00:26:29,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:26:29,920 INFO L204 MainTranslator]: Completed translation [2024-09-13 00:26:29,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29 WrapperNode [2024-09-13 00:26:29,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 00:26:29,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 00:26:29,922 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 00:26:29,922 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 00:26:29,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,941 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 00:26:29,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 00:26:29,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 00:26:29,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 00:26:29,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 00:26:29,951 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,956 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,971 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]. [2024-09-13 00:26:29,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,972 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,976 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,981 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,985 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 00:26:29,987 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 00:26:29,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 00:26:29,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 00:26:29,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (1/1) ... [2024-09-13 00:26:29,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:26:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:30,016 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) [2024-09-13 00:26:30,018 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 [2024-09-13 00:26:30,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 00:26:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 00:26:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 00:26:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 00:26:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 00:26:30,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 00:26:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 00:26:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 00:26:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 00:26:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 00:26:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 00:26:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 00:26:30,114 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 00:26:30,116 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 00:26:30,261 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-13 00:26:30,262 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 00:26:30,292 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 00:26:30,292 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 00:26:30,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:26:30 BoogieIcfgContainer [2024-09-13 00:26:30,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 00:26:30,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 00:26:30,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 00:26:30,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 00:26:30,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 12:26:29" (1/3) ... [2024-09-13 00:26:30,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b037f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:26:30, skipping insertion in model container [2024-09-13 00:26:30,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:26:29" (2/3) ... [2024-09-13 00:26:30,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b037f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:26:30, skipping insertion in model container [2024-09-13 00:26:30,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:26:30" (3/3) ... [2024-09-13 00:26:30,301 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2024-09-13 00:26:30,317 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 00:26:30,317 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 00:26:30,380 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 00:26:30,386 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;@488a9bb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 00:26:30,389 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 00:26:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 00:26:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 00:26:30,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:30,415 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:26:30,417 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:30,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:30,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-13 00:26:30,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:30,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175895930] [2024-09-13 00:26:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:30,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:26:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:26:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:26:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:26:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:26:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:26:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:26:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:26:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175895930] [2024-09-13 00:26:30,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175895930] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:26:30,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:26:30,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 00:26:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736416055] [2024-09-13 00:26:30,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:26:30,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 00:26:30,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 00:26:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:26:30,722 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:26:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:30,746 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-13 00:26:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 00:26:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-13 00:26:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:30,754 INFO L225 Difference]: With dead ends: 70 [2024-09-13 00:26:30,755 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 00:26:30,758 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:26:30,760 INFO L434 NwaCegarLoop]: 47 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, 47 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 [2024-09-13 00:26:30,761 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:26:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 00:26:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 00:26:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 00:26:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-13 00:26:30,794 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-13 00:26:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:30,795 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-13 00:26:30,795 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:26:30,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-13 00:26:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 00:26:30,798 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:30,798 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:26:30,798 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 00:26:30,798 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-13 00:26:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951299524] [2024-09-13 00:26:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:26:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:26:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:30,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:26:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:31,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:26:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:31,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:26:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:31,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:26:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:31,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:26:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:26:31,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951299524] [2024-09-13 00:26:31,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951299524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278384466] [2024-09-13 00:26:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:31,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:31,069 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) [2024-09-13 00:26:31,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 00:26:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:31,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 00:26:31,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:26:31,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:31,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278384466] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:31,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:26:31,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-13 00:26:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326046704] [2024-09-13 00:26:31,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:31,462 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:26:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:26:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:26:31,463 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:26:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:31,659 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-13 00:26:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:26:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-13 00:26:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:31,662 INFO L225 Difference]: With dead ends: 55 [2024-09-13 00:26:31,662 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 00:26:31,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-13 00:26:31,663 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:31,664 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:26:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 00:26:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-13 00:26:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:26:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-13 00:26:31,675 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-13 00:26:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:31,676 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-13 00:26:31,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:26:31,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-13 00:26:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 00:26:31,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:31,677 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:26:31,693 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 00:26:31,881 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 [2024-09-13 00:26:31,882 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:31,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-13 00:26:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787277819] [2024-09-13 00:26:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:31,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258566110] [2024-09-13 00:26:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:31,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:31,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:31,913 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) [2024-09-13 00:26:31,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 00:26:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:32,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:26:32,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:26:32,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:26:32,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:32,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787277819] [2024-09-13 00:26:32,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258566110] [2024-09-13 00:26:32,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258566110] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:26:32,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:26:32,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:26:32,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227019829] [2024-09-13 00:26:32,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:26:32,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:26:32,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:32,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:26:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:26:32,078 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:26:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:32,139 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-13 00:26:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:26:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-13 00:26:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:32,140 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:26:32,140 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:26:32,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:26:32,142 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:32,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:26:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:26:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-13 00:26:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:26:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-13 00:26:32,158 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-13 00:26:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:32,159 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-13 00:26:32,159 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:26:32,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-13 00:26:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 00:26:32,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:32,161 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:26:32,174 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 00:26:32,361 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 [2024-09-13 00:26:32,362 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:32,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-13 00:26:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:32,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963567080] [2024-09-13 00:26:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:32,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:32,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813568185] [2024-09-13 00:26:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:32,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:32,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:32,386 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) [2024-09-13 00:26:32,387 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 00:26:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:32,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:26:32,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:26:32,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:26:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963567080] [2024-09-13 00:26:32,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813568185] [2024-09-13 00:26:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813568185] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:26:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:26:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:26:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507963621] [2024-09-13 00:26:32,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:26:32,510 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:26:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:26:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:26:32,511 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-09-13 00:26:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:32,563 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-13 00:26:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:26:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 49 [2024-09-13 00:26:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:32,566 INFO L225 Difference]: With dead ends: 61 [2024-09-13 00:26:32,566 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 00:26:32,567 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:26:32,568 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:32,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:26:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 00:26:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-13 00:26:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:26:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-13 00:26:32,579 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-13 00:26:32,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:32,580 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-13 00:26:32,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-09-13 00:26:32,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-13 00:26:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 00:26:32,581 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:32,585 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2024-09-13 00:26:32,603 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 00:26:32,786 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 [2024-09-13 00:26:32,786 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:32,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-13 00:26:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:32,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365195467] [2024-09-13 00:26:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:32,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:32,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823703452] [2024-09-13 00:26:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:32,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:32,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:32,818 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) [2024-09-13 00:26:32,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 00:26:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:32,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:26:32,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 00:26:32,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:26:32,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:32,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365195467] [2024-09-13 00:26:32,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:32,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823703452] [2024-09-13 00:26:32,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823703452] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:26:32,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:26:32,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:26:32,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873557060] [2024-09-13 00:26:32,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:26:32,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:26:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:32,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:26:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:26:32,990 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:26:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:33,050 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-13 00:26:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:26:33,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-13 00:26:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:33,051 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:26:33,051 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:26:33,052 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:26:33,052 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:33,054 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:26:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:26:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-13 00:26:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:26:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-13 00:26:33,066 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-13 00:26:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:33,066 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-13 00:26:33,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:26:33,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-13 00:26:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-13 00:26:33,070 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:33,070 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2024-09-13 00:26:33,084 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 00:26:33,274 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 [2024-09-13 00:26:33,274 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:33,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-13 00:26:33,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:33,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424263159] [2024-09-13 00:26:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:33,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:33,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852314255] [2024-09-13 00:26:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:33,307 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) [2024-09-13 00:26:33,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 00:26:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:33,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:26:33,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:26:33,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:26:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:33,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424263159] [2024-09-13 00:26:33,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:33,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852314255] [2024-09-13 00:26:33,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852314255] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:26:33,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:26:33,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-13 00:26:33,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235997573] [2024-09-13 00:26:33,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:33,536 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:26:33,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:26:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:26:33,537 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:26:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:33,649 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-13 00:26:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 00:26:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-13 00:26:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:33,653 INFO L225 Difference]: With dead ends: 90 [2024-09-13 00:26:33,654 INFO L226 Difference]: Without dead ends: 88 [2024-09-13 00:26:33,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:26:33,655 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 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 [2024-09-13 00:26:33,655 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:26:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-13 00:26:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-13 00:26:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:26:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-13 00:26:33,674 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-13 00:26:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:33,675 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-13 00:26:33,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:26:33,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-13 00:26:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 00:26:33,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:33,677 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2024-09-13 00:26:33,694 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 00:26:33,877 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 [2024-09-13 00:26:33,878 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:33,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-13 00:26:33,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:33,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128873671] [2024-09-13 00:26:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:33,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:33,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:26:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:26:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:26:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:26:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:26:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:26:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:26:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:26:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:26:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:26:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:26:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:26:34,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:34,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128873671] [2024-09-13 00:26:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128873671] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:34,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148201855] [2024-09-13 00:26:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:34,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:34,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:34,060 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) [2024-09-13 00:26:34,067 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 00:26:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:26:34,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:26:34,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:26:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148201855] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:26:34,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:26:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 00:26:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482001383] [2024-09-13 00:26:34,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:34,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 00:26:34,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 00:26:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 00:26:34,242 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:26:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:34,423 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-13 00:26:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:26:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-13 00:26:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:34,426 INFO L225 Difference]: With dead ends: 105 [2024-09-13 00:26:34,426 INFO L226 Difference]: Without dead ends: 97 [2024-09-13 00:26:34,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:26:34,427 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:34,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:26:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-13 00:26:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-13 00:26:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-13 00:26:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-13 00:26:34,454 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-13 00:26:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:34,454 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-13 00:26:34,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:26:34,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-13 00:26:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 00:26:34,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:34,455 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2024-09-13 00:26:34,472 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 00:26:34,656 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 [2024-09-13 00:26:34,657 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:34,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-13 00:26:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:34,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345585546] [2024-09-13 00:26:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:34,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96439311] [2024-09-13 00:26:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:34,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:34,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:34,680 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) [2024-09-13 00:26:34,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 00:26:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:34,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 00:26:34,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 00:26:34,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:34,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345585546] [2024-09-13 00:26:34,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96439311] [2024-09-13 00:26:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96439311] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:34,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:26:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-13 00:26:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253010532] [2024-09-13 00:26:34,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:34,900 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 00:26:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 00:26:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:26:34,901 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:26:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:35,050 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-13 00:26:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:26:35,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-13 00:26:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:35,052 INFO L225 Difference]: With dead ends: 123 [2024-09-13 00:26:35,052 INFO L226 Difference]: Without dead ends: 120 [2024-09-13 00:26:35,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:26:35,053 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:35,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:26:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-13 00:26:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-13 00:26:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:26:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-13 00:26:35,083 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-13 00:26:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:35,083 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-13 00:26:35,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:26:35,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-13 00:26:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-13 00:26:35,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:35,085 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1] [2024-09-13 00:26:35,102 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 00:26:35,289 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 [2024-09-13 00:26:35,290 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:35,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:35,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-13 00:26:35,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:35,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374315466] [2024-09-13 00:26:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:35,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:35,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773261041] [2024-09-13 00:26:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:26:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:35,311 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) [2024-09-13 00:26:35,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 00:26:35,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:26:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:26:35,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 00:26:35,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 00:26:35,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:35,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:35,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374315466] [2024-09-13 00:26:35,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:35,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773261041] [2024-09-13 00:26:35,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773261041] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:35,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:26:35,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:26:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295878784] [2024-09-13 00:26:35,664 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:35,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:26:35,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:26:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:26:35,665 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:26:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:35,831 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-13 00:26:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:26:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-13 00:26:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:35,833 INFO L225 Difference]: With dead ends: 129 [2024-09-13 00:26:35,833 INFO L226 Difference]: Without dead ends: 127 [2024-09-13 00:26:35,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-13 00:26:35,834 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:35,834 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:26:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-13 00:26:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-13 00:26:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:26:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-13 00:26:35,855 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-13 00:26:35,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:35,855 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-13 00:26:35,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:26:35,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-13 00:26:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 00:26:35,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:35,856 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1] [2024-09-13 00:26:35,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 00:26:36,060 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 [2024-09-13 00:26:36,061 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:36,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-13 00:26:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:36,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27865368] [2024-09-13 00:26:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509354411] [2024-09-13 00:26:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:26:36,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:36,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:36,082 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) [2024-09-13 00:26:36,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 00:26:36,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:26:36,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:26:36,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-13 00:26:36,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-13 00:26:37,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:46,317 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~p~0 c_main_~x~0)) (.cse3 (* c_main_~r~0 c_main_~y~0)) (.cse0 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse1 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (= c_main_~c~0 0) (< c_main_~b~0 (+ c_main_~c~0 1)) (not (= (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0) (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (= (+ (* c_main_~yy~0 c_main_~r~0) .cse0 c_main_~c~0 .cse1 (* c_main_~xy~0 c_main_~p~0)) (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) .cse2 .cse3 (* c_main_~c~0 c_main_~y~0))) (not (= (+ .cse2 .cse3) (+ .cse0 c_main_~c~0 .cse1))))) is different from true [2024-09-13 00:26:48,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:48,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27865368] [2024-09-13 00:26:48,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:48,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509354411] [2024-09-13 00:26:48,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509354411] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:48,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:26:48,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 00:26:48,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918967227] [2024-09-13 00:26:48,009 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:48,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:26:48,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:48,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:26:48,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=502, Unknown=1, NotChecked=46, Total=650 [2024-09-13 00:26:48,010 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:26:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:48,524 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-13 00:26:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:26:48,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-13 00:26:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:48,526 INFO L225 Difference]: With dead ends: 133 [2024-09-13 00:26:48,526 INFO L226 Difference]: Without dead ends: 131 [2024-09-13 00:26:48,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=151, Invalid=664, Unknown=1, NotChecked=54, Total=870 [2024-09-13 00:26:48,527 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:48,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 00:26:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-13 00:26:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-13 00:26:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:26:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-13 00:26:48,568 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-13 00:26:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:48,569 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-13 00:26:48,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:26:48,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-13 00:26:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-13 00:26:48,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:48,570 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2024-09-13 00:26:48,587 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 00:26:48,771 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 [2024-09-13 00:26:48,771 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:48,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-13 00:26:48,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:48,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391384049] [2024-09-13 00:26:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:48,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:48,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556343256] [2024-09-13 00:26:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:48,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:48,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:48,790 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) [2024-09-13 00:26:48,797 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 00:26:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:48,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 00:26:48,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-13 00:26:49,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 00:26:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391384049] [2024-09-13 00:26:49,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556343256] [2024-09-13 00:26:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556343256] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:26:49,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:26:49,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-13 00:26:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117976755] [2024-09-13 00:26:49,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:49,973 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:26:49,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:26:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:26:49,974 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:26:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:52,487 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-13 00:26:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 00:26:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-13 00:26:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:52,490 INFO L225 Difference]: With dead ends: 229 [2024-09-13 00:26:52,490 INFO L226 Difference]: Without dead ends: 225 [2024-09-13 00:26:52,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 00:26:52,492 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:52,493 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-13 00:26:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-13 00:26:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-13 00:26:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-13 00:26:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-13 00:26:52,587 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-13 00:26:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:52,587 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-13 00:26:52,588 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:26:52,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-13 00:26:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-13 00:26:52,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:52,591 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:26:52,603 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 00:26:52,791 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 [2024-09-13 00:26:52,791 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:52,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-13 00:26:52,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:52,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607958577] [2024-09-13 00:26:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:52,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:26:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:26:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:26:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:26:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:26:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:26:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:26:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:26:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:26:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:26:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:26:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:26:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:26:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:26:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:26:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-13 00:26:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-13 00:26:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607958577] [2024-09-13 00:26:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607958577] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:26:52,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:26:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:26:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112756475] [2024-09-13 00:26:52,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:26:52,905 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:26:52,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:26:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:26:52,908 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-09-13 00:26:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:53,006 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-13 00:26:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:26:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 99 [2024-09-13 00:26:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:53,008 INFO L225 Difference]: With dead ends: 275 [2024-09-13 00:26:53,008 INFO L226 Difference]: Without dead ends: 201 [2024-09-13 00:26:53,009 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 [2024-09-13 00:26:53,010 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 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 [2024-09-13 00:26:53,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:26:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-13 00:26:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-13 00:26:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-13 00:26:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-13 00:26:53,086 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-13 00:26:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:53,088 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-13 00:26:53,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-09-13 00:26:53,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-13 00:26:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-13 00:26:53,089 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:53,089 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1] [2024-09-13 00:26:53,089 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 00:26:53,089 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:53,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-13 00:26:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:53,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172073735] [2024-09-13 00:26:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:53,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380921065] [2024-09-13 00:26:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:53,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:53,116 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) [2024-09-13 00:26:53,117 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 00:26:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:53,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 00:26:53,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-13 00:26:55,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:55,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172073735] [2024-09-13 00:26:55,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380921065] [2024-09-13 00:26:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380921065] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:55,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:26:55,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:26:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472537377] [2024-09-13 00:26:55,776 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:55,777 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:26:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:26:55,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:26:55,778 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:26:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:56,582 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-13 00:26:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:26:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-13 00:26:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:56,584 INFO L225 Difference]: With dead ends: 201 [2024-09-13 00:26:56,584 INFO L226 Difference]: Without dead ends: 199 [2024-09-13 00:26:56,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:26:56,585 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:56,585 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:26:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-13 00:26:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-13 00:26:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-13 00:26:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-13 00:26:56,676 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-13 00:26:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:56,676 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-13 00:26:56,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:26:56,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-13 00:26:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 00:26:56,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:56,678 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2024-09-13 00:26:56,695 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 00:26:56,879 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:56,879 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:56,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-13 00:26:56,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:56,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750296223] [2024-09-13 00:26:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:56,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:26:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:26:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:26:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:26:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:26:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:26:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:26:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:26:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:26:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:26:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:26:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:26:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:26:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:26:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:26:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 00:26:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 00:26:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 00:26:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 00:26:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:56,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 00:26:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:26:57,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:57,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750296223] [2024-09-13 00:26:57,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750296223] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:57,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793178889] [2024-09-13 00:26:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:57,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:57,006 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) [2024-09-13 00:26:57,015 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 00:26:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:57,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:26:57,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-13 00:26:57,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:26:57,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793178889] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:26:57,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:26:57,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-13 00:26:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524552578] [2024-09-13 00:26:57,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:57,180 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:26:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:26:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:26:57,181 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:26:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:57,385 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-13 00:26:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 00:26:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-13 00:26:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:57,387 INFO L225 Difference]: With dead ends: 227 [2024-09-13 00:26:57,387 INFO L226 Difference]: Without dead ends: 215 [2024-09-13 00:26:57,388 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:26:57,388 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 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 [2024-09-13 00:26:57,388 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:26:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-13 00:26:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-13 00:26:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-13 00:26:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-13 00:26:57,454 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-13 00:26:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:57,454 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-13 00:26:57,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:26:57,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-13 00:26:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-13 00:26:57,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:57,456 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2024-09-13 00:26:57,468 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 00:26:57,656 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 [2024-09-13 00:26:57,657 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:57,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-13 00:26:57,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:57,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619335723] [2024-09-13 00:26:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:57,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:57,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484168039] [2024-09-13 00:26:57,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:26:57,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:57,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:57,685 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) [2024-09-13 00:26:57,689 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 00:26:57,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:26:57,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:26:57,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 00:26:57,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:26:58,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:58,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:58,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619335723] [2024-09-13 00:26:58,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:58,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484168039] [2024-09-13 00:26:58,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484168039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:58,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:26:58,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:26:58,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17773244] [2024-09-13 00:26:58,117 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:58,117 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:26:58,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:58,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:26:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:26:58,118 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:26:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:58,365 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-13 00:26:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:26:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-13 00:26:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:58,367 INFO L225 Difference]: With dead ends: 230 [2024-09-13 00:26:58,367 INFO L226 Difference]: Without dead ends: 227 [2024-09-13 00:26:58,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-13 00:26:58,368 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:58,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:26:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-13 00:26:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-13 00:26:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:26:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-13 00:26:58,431 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-13 00:26:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:58,432 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-13 00:26:58,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:26:58,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-13 00:26:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-13 00:26:58,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:58,433 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2024-09-13 00:26:58,446 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 00:26:58,634 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 [2024-09-13 00:26:58,634 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:58,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-13 00:26:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450945647] [2024-09-13 00:26:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:58,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922927629] [2024-09-13 00:26:58,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:26:58,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:58,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:58,652 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) [2024-09-13 00:26:58,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 00:26:58,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:26:58,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:26:58,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 00:26:58,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:26:59,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:26:59,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450945647] [2024-09-13 00:26:59,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922927629] [2024-09-13 00:26:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922927629] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:26:59,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:26:59,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-13 00:26:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319238517] [2024-09-13 00:26:59,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:59,491 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:26:59,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:26:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-13 00:26:59,493 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:27:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:27:00,705 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-13 00:27:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:27:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-13 00:27:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:27:00,708 INFO L225 Difference]: With dead ends: 253 [2024-09-13 00:27:00,708 INFO L226 Difference]: Without dead ends: 251 [2024-09-13 00:27:00,708 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:27:00,709 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:27:00,709 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 00:27:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-13 00:27:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-13 00:27:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:27:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-13 00:27:00,831 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-13 00:27:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:27:00,832 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-13 00:27:00,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:27:00,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:27:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-13 00:27:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-13 00:27:00,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:27:00,833 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2024-09-13 00:27:00,850 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 00:27:01,037 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 [2024-09-13 00:27:01,038 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:27:01,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:27:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-13 00:27:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:27:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329410222] [2024-09-13 00:27:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:27:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:27:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:27:01,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375855712] [2024-09-13 00:27:01,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:27:01,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:27:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:27:01,059 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) [2024-09-13 00:27:01,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 00:27:01,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:27:01,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:27:01,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 00:27:01,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:27:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 00:27:01,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:27:32,921 WARN L293 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:27:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 00:27:51,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:27:51,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329410222] [2024-09-13 00:27:51,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:27:51,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375855712] [2024-09-13 00:27:51,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375855712] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:27:51,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:27:51,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2024-09-13 00:27:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151229477] [2024-09-13 00:27:51,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:27:51,715 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 00:27:51,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:27:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 00:27:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=390, Unknown=1, NotChecked=0, Total=506 [2024-09-13 00:27:51,715 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 00:28:24,088 WARN L293 SmtUtils]: Spent 30.65s on a formula simplification. DAG size of input: 95 DAG size of output: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:28:31,126 WARN L293 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:28:35,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:28:36,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:28:40,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:28:44,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:29:08,207 WARN L293 SmtUtils]: Spent 12.30s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:29:11,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:29:15,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:29:23,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:29:24,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:29:28,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:29:41,039 WARN L293 SmtUtils]: Spent 10.54s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:29:55,194 WARN L293 SmtUtils]: Spent 11.96s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:29:56,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:56,695 INFO L93 Difference]: Finished difference Result 318 states and 455 transitions. [2024-09-13 00:29:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 00:29:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 128 [2024-09-13 00:29:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:56,697 INFO L225 Difference]: With dead ends: 318 [2024-09-13 00:29:56,697 INFO L226 Difference]: Without dead ends: 316 [2024-09-13 00:29:56,698 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 106.7s TimeCoverageRelationStatistics Valid=399, Invalid=1082, Unknown=1, NotChecked=0, Total=1482 [2024-09-13 00:29:56,698 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 81 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 118 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:56,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 504 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 536 Invalid, 4 Unknown, 0 Unchecked, 36.3s Time] [2024-09-13 00:29:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-13 00:29:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2024-09-13 00:29:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 162 states have internal predecessors, (186), 131 states have call successors, (131), 21 states have call predecessors, (131), 20 states have return successors, (128), 126 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-13 00:29:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 445 transitions. [2024-09-13 00:29:56,983 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 445 transitions. Word has length 128 [2024-09-13 00:29:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:56,984 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 445 transitions. [2024-09-13 00:29:56,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 00:29:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 445 transitions. [2024-09-13 00:29:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-13 00:29:56,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:56,985 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2024-09-13 00:29:56,997 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 00:29:57,185 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 [2024-09-13 00:29:57,186 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:57,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:57,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-13 00:29:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:57,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884509960] [2024-09-13 00:29:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:29:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361638711] [2024-09-13 00:29:57,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:29:57,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:57,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:57,211 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) [2024-09-13 00:29:57,211 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 00:29:57,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 00:29:57,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:57,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-13 00:29:57,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:29:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 102 proven. 91 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-13 00:29:58,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:30:27,192 WARN L293 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:31:28,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:31:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884509960] [2024-09-13 00:31:28,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:31:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361638711] [2024-09-13 00:31:28,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361638711] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:31:28,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:31:28,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:31:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920799111] [2024-09-13 00:31:28,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:31:28,502 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:31:28,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:31:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:31:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=697, Unknown=4, NotChecked=0, Total=870 [2024-09-13 00:31:28,503 INFO L87 Difference]: Start difference. First operand 310 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:31:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:31:29,809 INFO L93 Difference]: Finished difference Result 369 states and 516 transitions. [2024-09-13 00:31:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:31:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 131 [2024-09-13 00:31:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:31:29,812 INFO L225 Difference]: With dead ends: 369 [2024-09-13 00:31:29,812 INFO L226 Difference]: Without dead ends: 367 [2024-09-13 00:31:29,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=276, Invalid=1126, Unknown=4, NotChecked=0, Total=1406 [2024-09-13 00:31:29,812 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:31:29,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 424 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:31:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-09-13 00:31:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362. [2024-09-13 00:31:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 191 states have internal predecessors, (218), 147 states have call successors, (147), 28 states have call predecessors, (147), 27 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2024-09-13 00:31:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 509 transitions. [2024-09-13 00:31:30,132 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 509 transitions. Word has length 131 [2024-09-13 00:31:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:31:30,132 INFO L474 AbstractCegarLoop]: Abstraction has 362 states and 509 transitions. [2024-09-13 00:31:30,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:31:30,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 509 transitions. [2024-09-13 00:31:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-13 00:31:30,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:31:30,133 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 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, 1, 1, 1] [2024-09-13 00:31:30,145 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 00:31:30,334 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 [2024-09-13 00:31:30,334 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:31:30,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-13 00:31:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:31:30,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925848533] [2024-09-13 00:31:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:31:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:31:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:31:30,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059496192] [2024-09-13 00:31:30,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:31:30,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:31:30,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:31:30,350 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) [2024-09-13 00:31:30,350 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 00:31:30,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:31:30,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:31:30,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:31:30,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:31:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 00:31:31,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:31:33,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:31:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925848533] [2024-09-13 00:31:33,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:31:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059496192] [2024-09-13 00:31:33,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059496192] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:31:33,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:31:33,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-13 00:31:33,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810693928] [2024-09-13 00:31:33,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:31:33,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:31:33,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:31:33,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:31:33,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:31:33,884 INFO L87 Difference]: Start difference. First operand 362 states and 509 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:31:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:31:35,199 INFO L93 Difference]: Finished difference Result 391 states and 552 transitions. [2024-09-13 00:31:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:31:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-09-13 00:31:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:31:35,202 INFO L225 Difference]: With dead ends: 391 [2024-09-13 00:31:35,202 INFO L226 Difference]: Without dead ends: 384 [2024-09-13 00:31:35,203 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 00:31:35,203 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 29 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:31:35,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 663 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 00:31:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-09-13 00:31:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 362. [2024-09-13 00:31:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 187 states have (on average 1.160427807486631) internal successors, (217), 191 states have internal predecessors, (217), 147 states have call successors, (147), 28 states have call predecessors, (147), 27 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2024-09-13 00:31:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 508 transitions. [2024-09-13 00:31:35,537 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 508 transitions. Word has length 137 [2024-09-13 00:31:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:31:35,538 INFO L474 AbstractCegarLoop]: Abstraction has 362 states and 508 transitions. [2024-09-13 00:31:35,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:31:35,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 508 transitions. [2024-09-13 00:31:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-13 00:31:35,539 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:31:35,539 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:31:35,555 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 00:31:35,743 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 [2024-09-13 00:31:35,744 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:31:35,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 6 times [2024-09-13 00:31:35,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:31:35,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20115967] [2024-09-13 00:31:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:31:35,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:31:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:31:35,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836716271] [2024-09-13 00:31:35,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:31:35,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:31:35,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:31:35,781 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) [2024-09-13 00:31:35,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 00:31:36,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:31:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:31:36,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-13 00:31:36,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:31:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 102 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2024-09-13 00:31:39,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:31:51,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:31:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20115967] [2024-09-13 00:31:51,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:31:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836716271] [2024-09-13 00:31:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836716271] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:31:51,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:31:51,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:31:51,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109680035] [2024-09-13 00:31:51,862 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:31:51,863 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:31:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:31:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:31:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2024-09-13 00:31:51,864 INFO L87 Difference]: Start difference. First operand 362 states and 508 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:31:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:31:54,499 INFO L93 Difference]: Finished difference Result 425 states and 588 transitions. [2024-09-13 00:31:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:31:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 153 [2024-09-13 00:31:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:31:54,501 INFO L225 Difference]: With dead ends: 425 [2024-09-13 00:31:54,501 INFO L226 Difference]: Without dead ends: 423 [2024-09-13 00:31:54,502 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 00:31:54,502 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:31:54,502 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 312 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-13 00:31:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-13 00:31:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 418. [2024-09-13 00:31:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 217 states have (on average 1.152073732718894) internal successors, (250), 222 states have internal predecessors, (250), 167 states have call successors, (167), 34 states have call predecessors, (167), 33 states have return successors, (164), 161 states have call predecessors, (164), 164 states have call successors, (164) [2024-09-13 00:31:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 581 transitions. [2024-09-13 00:31:54,894 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 581 transitions. Word has length 153 [2024-09-13 00:31:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:31:54,895 INFO L474 AbstractCegarLoop]: Abstraction has 418 states and 581 transitions. [2024-09-13 00:31:54,895 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:31:54,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 581 transitions. [2024-09-13 00:31:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-13 00:31:54,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:31:54,896 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-09-13 00:31:54,903 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-13 00:31:55,097 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 [2024-09-13 00:31:55,097 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:31:55,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:55,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-13 00:31:55,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:31:55,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586881220] [2024-09-13 00:31:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:31:55,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:31:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:31:55,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931240134] [2024-09-13 00:31:55,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:31:55,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:31:55,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:31:55,117 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) [2024-09-13 00:31:55,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 00:31:55,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:31:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:31:55,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 00:31:55,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:31:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-13 00:31:55,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586881220] [2024-09-13 00:32:00,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931240134] [2024-09-13 00:32:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931240134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:00,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:00,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 00:32:00,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120680193] [2024-09-13 00:32:00,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:00,459 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 00:32:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:00,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 00:32:00,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-13 00:32:00,459 INFO L87 Difference]: Start difference. First operand 418 states and 581 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:32:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:01,096 INFO L93 Difference]: Finished difference Result 435 states and 595 transitions. [2024-09-13 00:32:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 00:32:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-09-13 00:32:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:01,099 INFO L225 Difference]: With dead ends: 435 [2024-09-13 00:32:01,099 INFO L226 Difference]: Without dead ends: 428 [2024-09-13 00:32:01,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:32:01,100 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:01,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 306 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:32:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-09-13 00:32:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 417. [2024-09-13 00:32:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 218 states have (on average 1.1422018348623852) internal successors, (249), 223 states have internal predecessors, (249), 163 states have call successors, (163), 36 states have call predecessors, (163), 35 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2024-09-13 00:32:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 572 transitions. [2024-09-13 00:32:01,491 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 572 transitions. Word has length 156 [2024-09-13 00:32:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:01,491 INFO L474 AbstractCegarLoop]: Abstraction has 417 states and 572 transitions. [2024-09-13 00:32:01,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:32:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 572 transitions. [2024-09-13 00:32:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:32:01,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:01,493 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:01,505 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:01,693 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 [2024-09-13 00:32:01,693 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:01,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-09-13 00:32:01,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:01,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583346568] [2024-09-13 00:32:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:01,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502331264] [2024-09-13 00:32:01,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:32:01,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:01,709 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) [2024-09-13 00:32:01,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 00:32:01,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:32:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:01,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-13 00:32:01,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 63 proven. 116 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-09-13 00:32:02,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583346568] [2024-09-13 00:32:04,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:04,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502331264] [2024-09-13 00:32:04,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502331264] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:04,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:04,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:32:04,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796872959] [2024-09-13 00:32:04,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:04,763 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:32:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:32:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-09-13 00:32:04,764 INFO L87 Difference]: Start difference. First operand 417 states and 572 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:32:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:06,578 INFO L93 Difference]: Finished difference Result 468 states and 645 transitions. [2024-09-13 00:32:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:32:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 159 [2024-09-13 00:32:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:06,581 INFO L225 Difference]: With dead ends: 468 [2024-09-13 00:32:06,581 INFO L226 Difference]: Without dead ends: 461 [2024-09-13 00:32:06,582 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:06,586 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:06,587 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 508 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 00:32:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-09-13 00:32:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 434. [2024-09-13 00:32:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 234 states have internal predecessors, (261), 167 states have call successors, (167), 38 states have call predecessors, (167), 37 states have return successors, (164), 161 states have call predecessors, (164), 164 states have call successors, (164) [2024-09-13 00:32:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 592 transitions. [2024-09-13 00:32:07,045 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 592 transitions. Word has length 159 [2024-09-13 00:32:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:07,046 INFO L474 AbstractCegarLoop]: Abstraction has 434 states and 592 transitions. [2024-09-13 00:32:07,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:32:07,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 592 transitions. [2024-09-13 00:32:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:32:07,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:07,047 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:07,060 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-13 00:32:07,251 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 [2024-09-13 00:32:07,251 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:07,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 895086330, now seen corresponding path program 5 times [2024-09-13 00:32:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202075458] [2024-09-13 00:32:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908821906] [2024-09-13 00:32:07,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:32:07,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:07,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:07,276 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) [2024-09-13 00:32:07,277 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 00:32:07,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 00:32:07,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:07,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:32:07,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-09-13 00:32:10,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:18,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202075458] [2024-09-13 00:32:18,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:18,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908821906] [2024-09-13 00:32:18,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908821906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:18,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:18,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:32:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688389280] [2024-09-13 00:32:18,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:18,237 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:32:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:18,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:32:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:32:18,238 INFO L87 Difference]: Start difference. First operand 434 states and 592 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:32:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:23,036 INFO L93 Difference]: Finished difference Result 486 states and 661 transitions. [2024-09-13 00:32:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:32:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 159 [2024-09-13 00:32:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:23,041 INFO L225 Difference]: With dead ends: 486 [2024-09-13 00:32:23,041 INFO L226 Difference]: Without dead ends: 484 [2024-09-13 00:32:23,042 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 00:32:23,042 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 34 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:23,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 779 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-13 00:32:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-13 00:32:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 454. [2024-09-13 00:32:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 244 states have (on average 1.1352459016393444) internal successors, (277), 250 states have internal predecessors, (277), 168 states have call successors, (168), 42 states have call predecessors, (168), 41 states have return successors, (165), 161 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-13 00:32:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 610 transitions. [2024-09-13 00:32:23,495 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 610 transitions. Word has length 159 [2024-09-13 00:32:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:23,495 INFO L474 AbstractCegarLoop]: Abstraction has 454 states and 610 transitions. [2024-09-13 00:32:23,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:32:23,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 610 transitions. [2024-09-13 00:32:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-13 00:32:23,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:23,497 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:23,515 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:23,697 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 [2024-09-13 00:32:23,697 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:23,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash 487350504, now seen corresponding path program 2 times [2024-09-13 00:32:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:23,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690932967] [2024-09-13 00:32:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:23,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:23,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124426733] [2024-09-13 00:32:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:32:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:23,716 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) [2024-09-13 00:32:23,717 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 00:32:23,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:32:23,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:23,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 00:32:23,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 104 proven. 80 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2024-09-13 00:32:24,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-13 00:32:24,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690932967] [2024-09-13 00:32:24,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124426733] [2024-09-13 00:32:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124426733] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:32:24,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:32:24,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-13 00:32:24,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831009618] [2024-09-13 00:32:24,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:24,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:32:24,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:32:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:32:24,633 INFO L87 Difference]: Start difference. First operand 454 states and 610 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:32:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:27,786 INFO L93 Difference]: Finished difference Result 508 states and 685 transitions. [2024-09-13 00:32:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:32:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) Word has length 164 [2024-09-13 00:32:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:27,790 INFO L225 Difference]: With dead ends: 508 [2024-09-13 00:32:27,790 INFO L226 Difference]: Without dead ends: 495 [2024-09-13 00:32:27,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:27,791 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 62 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:27,791 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 656 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-13 00:32:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2024-09-13 00:32:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 470. [2024-09-13 00:32:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 256 states have (on average 1.12890625) internal successors, (289), 263 states have internal predecessors, (289), 171 states have call successors, (171), 43 states have call predecessors, (171), 42 states have return successors, (169), 163 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-13 00:32:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 629 transitions. [2024-09-13 00:32:28,278 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 629 transitions. Word has length 164 [2024-09-13 00:32:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:28,278 INFO L474 AbstractCegarLoop]: Abstraction has 470 states and 629 transitions. [2024-09-13 00:32:28,279 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:32:28,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 629 transitions. [2024-09-13 00:32:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-13 00:32:28,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:28,281 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:28,296 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-13 00:32:28,482 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 [2024-09-13 00:32:28,482 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:28,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:28,482 INFO L85 PathProgramCache]: Analyzing trace with hash -700524310, now seen corresponding path program 7 times [2024-09-13 00:32:28,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:28,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454410303] [2024-09-13 00:32:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:28,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940180232] [2024-09-13 00:32:28,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:32:28,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:28,501 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) [2024-09-13 00:32:28,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 00:32:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:28,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-13 00:32:28,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:37,111 WARN L293 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:32:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 216 proven. 174 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2024-09-13 00:32:37,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:37,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:37,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454410303] [2024-09-13 00:32:37,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:37,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940180232] [2024-09-13 00:32:37,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940180232] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:37,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:37,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 00:32:37,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645370600] [2024-09-13 00:32:37,545 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:37,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:32:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:32:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:32:37,546 INFO L87 Difference]: Start difference. First operand 470 states and 629 transitions. Second operand has 24 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 14 states have call predecessors, (30), 11 states have call successors, (30) [2024-09-13 00:32:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:40,609 INFO L93 Difference]: Finished difference Result 519 states and 692 transitions. [2024-09-13 00:32:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:32:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 14 states have call predecessors, (30), 11 states have call successors, (30) Word has length 175 [2024-09-13 00:32:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:40,612 INFO L225 Difference]: With dead ends: 519 [2024-09-13 00:32:40,612 INFO L226 Difference]: Without dead ends: 517 [2024-09-13 00:32:40,612 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 00:32:40,612 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 61 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:40,613 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 488 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-13 00:32:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2024-09-13 00:32:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 514. [2024-09-13 00:32:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 279 states have (on average 1.1290322580645162) internal successors, (315), 286 states have internal predecessors, (315), 187 states have call successors, (187), 48 states have call predecessors, (187), 47 states have return successors, (185), 179 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-13 00:32:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 687 transitions. [2024-09-13 00:32:41,129 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 687 transitions. Word has length 175 [2024-09-13 00:32:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:41,130 INFO L474 AbstractCegarLoop]: Abstraction has 514 states and 687 transitions. [2024-09-13 00:32:41,130 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 14 states have call predecessors, (30), 11 states have call successors, (30) [2024-09-13 00:32:41,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 687 transitions. [2024-09-13 00:32:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-09-13 00:32:41,135 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:41,135 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:41,148 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:41,336 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 [2024-09-13 00:32:41,336 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:41,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -942115888, now seen corresponding path program 8 times [2024-09-13 00:32:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057354248] [2024-09-13 00:32:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:41,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599874629] [2024-09-13 00:32:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:32:41,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:41,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:41,356 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) [2024-09-13 00:32:41,357 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 00:32:41,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:32:41,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:41,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-13 00:32:41,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 219 proven. 170 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-09-13 00:32:42,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057354248] [2024-09-13 00:32:43,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599874629] [2024-09-13 00:32:43,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599874629] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:43,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:43,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 00:32:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375581853] [2024-09-13 00:32:43,159 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:43,160 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:32:43,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:32:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:32:43,161 INFO L87 Difference]: Start difference. First operand 514 states and 687 transitions. Second operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:32:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:45,246 INFO L93 Difference]: Finished difference Result 568 states and 755 transitions. [2024-09-13 00:32:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:32:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) Word has length 178 [2024-09-13 00:32:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:45,249 INFO L225 Difference]: With dead ends: 568 [2024-09-13 00:32:45,249 INFO L226 Difference]: Without dead ends: 566 [2024-09-13 00:32:45,250 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:45,250 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 42 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:45,250 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 650 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 00:32:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-09-13 00:32:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 561. [2024-09-13 00:32:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 305 states have (on average 1.1278688524590164) internal successors, (344), 312 states have internal predecessors, (344), 203 states have call successors, (203), 53 states have call predecessors, (203), 52 states have return successors, (201), 195 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-13 00:32:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 748 transitions. [2024-09-13 00:32:45,846 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 748 transitions. Word has length 178 [2024-09-13 00:32:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:45,847 INFO L474 AbstractCegarLoop]: Abstraction has 561 states and 748 transitions. [2024-09-13 00:32:45,847 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:32:45,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 748 transitions. [2024-09-13 00:32:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:32:45,848 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:45,848 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:45,861 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-13 00:32:46,049 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 [2024-09-13 00:32:46,049 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:46,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1646591799, now seen corresponding path program 6 times [2024-09-13 00:32:46,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:46,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365580877] [2024-09-13 00:32:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:46,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061905904] [2024-09-13 00:32:46,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:32:46,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:46,069 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) [2024-09-13 00:32:46,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 00:32:46,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 00:32:46,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:46,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:32:46,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 127 proven. 132 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-13 00:32:48,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:52,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:52,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365580877] [2024-09-13 00:32:52,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:52,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061905904] [2024-09-13 00:32:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061905904] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:52,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:32:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641852725] [2024-09-13 00:32:52,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:52,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:32:52,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:32:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=509, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:32:52,287 INFO L87 Difference]: Start difference. First operand 561 states and 748 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:32:59,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:05,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:07,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:09,474 INFO L93 Difference]: Finished difference Result 583 states and 766 transitions. [2024-09-13 00:33:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:33:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 181 [2024-09-13 00:33:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:09,478 INFO L225 Difference]: With dead ends: 583 [2024-09-13 00:33:09,478 INFO L226 Difference]: Without dead ends: 576 [2024-09-13 00:33:09,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=133, Invalid=736, Unknown=1, NotChecked=0, Total=870 [2024-09-13 00:33:09,479 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:09,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 546 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 476 Invalid, 2 Unknown, 0 Unchecked, 15.8s Time] [2024-09-13 00:33:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-13 00:33:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 573. [2024-09-13 00:33:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 314 states have (on average 1.1210191082802548) internal successors, (352), 321 states have internal predecessors, (352), 203 states have call successors, (203), 56 states have call predecessors, (203), 55 states have return successors, (201), 195 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-13 00:33:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 756 transitions. [2024-09-13 00:33:10,095 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 756 transitions. Word has length 181 [2024-09-13 00:33:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:10,096 INFO L474 AbstractCegarLoop]: Abstraction has 573 states and 756 transitions. [2024-09-13 00:33:10,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:33:10,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 756 transitions. [2024-09-13 00:33:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:33:10,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:10,098 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:10,111 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:10,298 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 [2024-09-13 00:33:10,298 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:10,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash -468699879, now seen corresponding path program 7 times [2024-09-13 00:33:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131054522] [2024-09-13 00:33:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:10,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213964959] [2024-09-13 00:33:10,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:33:10,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:10,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:10,317 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) [2024-09-13 00:33:10,318 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 00:33:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:10,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 00:33:10,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 119 proven. 110 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2024-09-13 00:33:12,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:23,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:23,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131054522] [2024-09-13 00:33:23,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:23,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213964959] [2024-09-13 00:33:23,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213964959] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:23,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:23,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:33:23,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258449507] [2024-09-13 00:33:23,319 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:23,319 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:33:23,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:33:23,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=623, Unknown=2, NotChecked=0, Total=702 [2024-09-13 00:33:23,320 INFO L87 Difference]: Start difference. First operand 573 states and 756 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:33:32,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:33:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:33,379 INFO L93 Difference]: Finished difference Result 620 states and 826 transitions. [2024-09-13 00:33:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 00:33:33,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) Word has length 181 [2024-09-13 00:33:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:33,383 INFO L225 Difference]: With dead ends: 620 [2024-09-13 00:33:33,383 INFO L226 Difference]: Without dead ends: 613 [2024-09-13 00:33:33,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=146, Invalid=1184, Unknown=2, NotChecked=0, Total=1332 [2024-09-13 00:33:33,383 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 47 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:33,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 549 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1038 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2024-09-13 00:33:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2024-09-13 00:33:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 586. [2024-09-13 00:33:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 322 states have (on average 1.1211180124223603) internal successors, (361), 329 states have internal predecessors, (361), 207 states have call successors, (207), 57 states have call predecessors, (207), 56 states have return successors, (205), 199 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-13 00:33:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 773 transitions. [2024-09-13 00:33:34,019 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 773 transitions. Word has length 181 [2024-09-13 00:33:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:34,019 INFO L474 AbstractCegarLoop]: Abstraction has 586 states and 773 transitions. [2024-09-13 00:33:34,019 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:33:34,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 773 transitions. [2024-09-13 00:33:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:33:34,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:34,021 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:34,034 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:34,221 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 [2024-09-13 00:33:34,221 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:34,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:34,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1752760443, now seen corresponding path program 8 times [2024-09-13 00:33:34,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:34,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539284675] [2024-09-13 00:33:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:34,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:34,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388144851] [2024-09-13 00:33:34,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:33:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:34,243 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) [2024-09-13 00:33:34,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 00:33:34,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:33:34,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:34,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 00:33:34,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 101 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2024-09-13 00:33:35,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:38,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:38,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539284675] [2024-09-13 00:33:38,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:38,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388144851] [2024-09-13 00:33:38,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388144851] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:38,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:38,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:33:38,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941772495] [2024-09-13 00:33:38,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:38,455 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:33:38,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:33:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:33:38,456 INFO L87 Difference]: Start difference. First operand 586 states and 773 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2024-09-13 00:33:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:41,033 INFO L93 Difference]: Finished difference Result 638 states and 847 transitions. [2024-09-13 00:33:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:33:41,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 181 [2024-09-13 00:33:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:41,037 INFO L225 Difference]: With dead ends: 638 [2024-09-13 00:33:41,037 INFO L226 Difference]: Without dead ends: 631 [2024-09-13 00:33:41,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 00:33:41,038 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 37 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:41,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 942 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-13 00:33:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2024-09-13 00:33:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 603. [2024-09-13 00:33:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 333 states have (on average 1.12012012012012) internal successors, (373), 340 states have internal predecessors, (373), 211 states have call successors, (211), 59 states have call predecessors, (211), 58 states have return successors, (209), 203 states have call predecessors, (209), 209 states have call successors, (209) [2024-09-13 00:33:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 793 transitions. [2024-09-13 00:33:41,682 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 793 transitions. Word has length 181 [2024-09-13 00:33:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:41,682 INFO L474 AbstractCegarLoop]: Abstraction has 603 states and 793 transitions. [2024-09-13 00:33:41,682 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2024-09-13 00:33:41,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 793 transitions. [2024-09-13 00:33:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-09-13 00:33:41,684 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:41,684 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 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] [2024-09-13 00:33:41,697 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:41,884 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 [2024-09-13 00:33:41,885 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:41,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:41,885 INFO L85 PathProgramCache]: Analyzing trace with hash 58480029, now seen corresponding path program 9 times [2024-09-13 00:33:41,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:41,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844592624] [2024-09-13 00:33:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:41,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:41,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344945786] [2024-09-13 00:33:41,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:33:41,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:41,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:41,913 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) [2024-09-13 00:33:41,916 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 00:33:42,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 00:33:42,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:42,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-13 00:33:42,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 148 proven. 152 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2024-09-13 00:33:43,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 201 proven. 68 refuted. 0 times theorem prover too weak. 1048 trivial. 0 not checked. [2024-09-13 00:33:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844592624] [2024-09-13 00:33:44,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344945786] [2024-09-13 00:33:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344945786] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:44,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2024-09-13 00:33:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447910394] [2024-09-13 00:33:44,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:44,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 00:33:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 00:33:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:33:44,810 INFO L87 Difference]: Start difference. First operand 603 states and 793 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:33:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:53,774 INFO L93 Difference]: Finished difference Result 665 states and 873 transitions. [2024-09-13 00:33:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-13 00:33:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) Word has length 184 [2024-09-13 00:33:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:53,778 INFO L225 Difference]: With dead ends: 665 [2024-09-13 00:33:53,778 INFO L226 Difference]: Without dead ends: 657 [2024-09-13 00:33:53,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=783, Invalid=3639, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 00:33:53,780 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 139 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:53,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 817 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-13 00:33:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2024-09-13 00:33:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 646. [2024-09-13 00:33:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 356 states have (on average 1.1207865168539326) internal successors, (399), 363 states have internal predecessors, (399), 227 states have call successors, (227), 63 states have call predecessors, (227), 62 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2024-09-13 00:33:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 851 transitions. [2024-09-13 00:33:54,640 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 851 transitions. Word has length 184 [2024-09-13 00:33:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:54,640 INFO L474 AbstractCegarLoop]: Abstraction has 646 states and 851 transitions. [2024-09-13 00:33:54,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:33:54,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 851 transitions. [2024-09-13 00:33:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-09-13 00:33:54,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:54,643 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:54,652 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:54,843 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 [2024-09-13 00:33:54,843 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:54,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash 735942281, now seen corresponding path program 9 times [2024-09-13 00:33:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:54,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098187766] [2024-09-13 00:33:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:54,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:54,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410930421] [2024-09-13 00:33:54,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:33:54,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:54,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:54,876 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) [2024-09-13 00:33:54,883 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-13 00:33:54,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:33:54,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:54,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-13 00:33:54,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 223 proven. 72 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2024-09-13 00:33:56,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:56,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:56,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098187766] [2024-09-13 00:33:56,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:56,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410930421] [2024-09-13 00:33:56,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410930421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:56,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:56,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 00:33:56,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402152986] [2024-09-13 00:33:56,561 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:56,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:33:56,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:33:56,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-13 00:33:56,562 INFO L87 Difference]: Start difference. First operand 646 states and 851 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:33:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:58,010 INFO L93 Difference]: Finished difference Result 675 states and 874 transitions. [2024-09-13 00:33:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:33:58,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 197 [2024-09-13 00:33:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:58,014 INFO L225 Difference]: With dead ends: 675 [2024-09-13 00:33:58,014 INFO L226 Difference]: Without dead ends: 673 [2024-09-13 00:33:58,014 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:33:58,014 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 18 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:58,015 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 578 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:33:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2024-09-13 00:33:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 670. [2024-09-13 00:33:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 374 states have (on average 1.1149732620320856) internal successors, (417), 381 states have internal predecessors, (417), 227 states have call successors, (227), 69 states have call predecessors, (227), 68 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2024-09-13 00:33:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 869 transitions. [2024-09-13 00:33:58,790 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 869 transitions. Word has length 197 [2024-09-13 00:33:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:58,790 INFO L474 AbstractCegarLoop]: Abstraction has 670 states and 869 transitions. [2024-09-13 00:33:58,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:33:58,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 869 transitions. [2024-09-13 00:33:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-09-13 00:33:58,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:58,792 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:58,805 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-13 00:33:58,996 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 [2024-09-13 00:33:58,997 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:58,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash -659240853, now seen corresponding path program 10 times [2024-09-13 00:33:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:58,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855695660] [2024-09-13 00:33:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:58,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:59,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990910178] [2024-09-13 00:33:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:33:59,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:59,016 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) [2024-09-13 00:33:59,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-13 00:33:59,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:33:59,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:59,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 00:33:59,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 254 proven. 203 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2024-09-13 00:34:01,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:01,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855695660] [2024-09-13 00:34:01,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990910178] [2024-09-13 00:34:01,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990910178] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:34:01,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:34:01,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:34:01,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163548863] [2024-09-13 00:34:01,679 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:01,680 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:34:01,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:01,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:34:01,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-09-13 00:34:01,681 INFO L87 Difference]: Start difference. First operand 670 states and 869 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) [2024-09-13 00:34:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:04,402 INFO L93 Difference]: Finished difference Result 715 states and 929 transitions. [2024-09-13 00:34:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:34:04,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) Word has length 197 [2024-09-13 00:34:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:04,406 INFO L225 Difference]: With dead ends: 715 [2024-09-13 00:34:04,406 INFO L226 Difference]: Without dead ends: 713 [2024-09-13 00:34:04,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:34:04,407 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 40 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:04,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 922 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 00:34:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-09-13 00:34:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 677. [2024-09-13 00:34:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 378 states have (on average 1.1137566137566137) internal successors, (421), 386 states have internal predecessors, (421), 229 states have call successors, (229), 70 states have call predecessors, (229), 69 states have return successors, (227), 220 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-13 00:34:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 877 transitions. [2024-09-13 00:34:05,211 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 877 transitions. Word has length 197 [2024-09-13 00:34:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:05,211 INFO L474 AbstractCegarLoop]: Abstraction has 677 states and 877 transitions. [2024-09-13 00:34:05,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) [2024-09-13 00:34:05,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 877 transitions. [2024-09-13 00:34:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:34:05,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:05,213 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:05,226 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-13 00:34:05,417 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 [2024-09-13 00:34:05,418 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:05,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2074926545, now seen corresponding path program 11 times [2024-09-13 00:34:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064862564] [2024-09-13 00:34:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:05,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320747719] [2024-09-13 00:34:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:34:05,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:05,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:05,437 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) [2024-09-13 00:34:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-13 00:34:05,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-13 00:34:05,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:05,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-13 00:34:05,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 136 proven. 203 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2024-09-13 00:34:07,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064862564] [2024-09-13 00:34:08,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320747719] [2024-09-13 00:34:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320747719] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:34:08,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:34:08,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:34:08,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044449171] [2024-09-13 00:34:08,469 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:08,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:34:08,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:34:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-09-13 00:34:08,470 INFO L87 Difference]: Start difference. First operand 677 states and 877 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 00:34:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:11,913 INFO L93 Difference]: Finished difference Result 742 states and 973 transitions. [2024-09-13 00:34:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:34:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) Word has length 200 [2024-09-13 00:34:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:11,921 INFO L225 Difference]: With dead ends: 742 [2024-09-13 00:34:11,921 INFO L226 Difference]: Without dead ends: 740 [2024-09-13 00:34:11,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-09-13 00:34:11,922 INFO L434 NwaCegarLoop]: 70 mSDtfsCounter, 39 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:11,922 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 938 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-13 00:34:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2024-09-13 00:34:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 684. [2024-09-13 00:34:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 381 states have (on average 1.1154855643044619) internal successors, (425), 388 states have internal predecessors, (425), 233 states have call successors, (233), 70 states have call predecessors, (233), 69 states have return successors, (231), 225 states have call predecessors, (231), 231 states have call successors, (231) [2024-09-13 00:34:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 889 transitions. [2024-09-13 00:34:12,765 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 889 transitions. Word has length 200 [2024-09-13 00:34:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:12,766 INFO L474 AbstractCegarLoop]: Abstraction has 684 states and 889 transitions. [2024-09-13 00:34:12,766 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 00:34:12,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 889 transitions. [2024-09-13 00:34:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:34:12,768 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:12,768 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:12,775 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-13 00:34:12,968 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:12,968 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:12,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash 572704943, now seen corresponding path program 12 times [2024-09-13 00:34:12,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:12,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511448287] [2024-09-13 00:34:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:12,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:12,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14803779] [2024-09-13 00:34:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:34:12,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:12,997 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:12,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-13 00:34:13,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:34:13,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:13,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-13 00:34:13,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 217 proven. 38 refuted. 0 times theorem prover too weak. 1398 trivial. 0 not checked. [2024-09-13 00:34:15,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:15,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:15,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511448287] [2024-09-13 00:34:15,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14803779] [2024-09-13 00:34:15,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14803779] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:34:15,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:34:15,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:34:15,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183576117] [2024-09-13 00:34:15,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:15,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:34:15,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:34:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:34:15,644 INFO L87 Difference]: Start difference. First operand 684 states and 889 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:34:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:18,794 INFO L93 Difference]: Finished difference Result 770 states and 1003 transitions. [2024-09-13 00:34:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 00:34:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) Word has length 200 [2024-09-13 00:34:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:18,797 INFO L225 Difference]: With dead ends: 770 [2024-09-13 00:34:18,797 INFO L226 Difference]: Without dead ends: 768 [2024-09-13 00:34:18,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 00:34:18,798 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 28 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:18,798 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 482 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 00:34:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2024-09-13 00:34:19,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 685. [2024-09-13 00:34:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 384 states have (on average 1.1119791666666667) internal successors, (427), 392 states have internal predecessors, (427), 229 states have call successors, (229), 72 states have call predecessors, (229), 71 states have return successors, (227), 220 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-13 00:34:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 883 transitions. [2024-09-13 00:34:19,650 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 883 transitions. Word has length 200 [2024-09-13 00:34:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:19,651 INFO L474 AbstractCegarLoop]: Abstraction has 685 states and 883 transitions. [2024-09-13 00:34:19,651 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:34:19,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 883 transitions. [2024-09-13 00:34:19,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-09-13 00:34:19,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:19,653 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:19,661 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-13 00:34:19,853 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-13 00:34:19,854 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:19,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:19,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1842378248, now seen corresponding path program 10 times [2024-09-13 00:34:19,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:19,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082093945] [2024-09-13 00:34:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:19,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:19,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436342295] [2024-09-13 00:34:19,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:34:19,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:19,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:19,875 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:19,888 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-13 00:34:19,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:34:19,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:19,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-13 00:34:19,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 91 proven. 194 refuted. 0 times theorem prover too weak. 1476 trivial. 0 not checked. [2024-09-13 00:34:21,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 85 proven. 185 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2024-09-13 00:34:26,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082093945] [2024-09-13 00:34:26,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436342295] [2024-09-13 00:34:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436342295] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:34:26,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:34:26,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2024-09-13 00:34:26,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777903552] [2024-09-13 00:34:26,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:26,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 00:34:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 00:34:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 00:34:26,188 INFO L87 Difference]: Start difference. First operand 685 states and 883 transitions. Second operand has 36 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) [2024-09-13 00:34:33,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:34:39,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:35:23,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:35:51,424 WARN L293 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 123 DAG size of output: 128 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:35:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:57,724 INFO L93 Difference]: Finished difference Result 1017 states and 1464 transitions. [2024-09-13 00:35:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-13 00:35:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) Word has length 203 [2024-09-13 00:35:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:57,729 INFO L225 Difference]: With dead ends: 1017 [2024-09-13 00:35:57,729 INFO L226 Difference]: Without dead ends: 1009 [2024-09-13 00:35:57,731 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 62.0s TimeCoverageRelationStatistics Valid=1765, Invalid=8740, Unknown=1, NotChecked=0, Total=10506 [2024-09-13 00:35:57,731 INFO L434 NwaCegarLoop]: 94 mSDtfsCounter, 229 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 399 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:57,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1631 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2233 Invalid, 2 Unknown, 0 Unchecked, 30.2s Time] [2024-09-13 00:35:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2024-09-13 00:35:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 781. [2024-09-13 00:35:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 416 states have (on average 1.1394230769230769) internal successors, (474), 424 states have internal predecessors, (474), 293 states have call successors, (293), 72 states have call predecessors, (293), 71 states have return successors, (291), 284 states have call predecessors, (291), 291 states have call successors, (291) [2024-09-13 00:35:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1058 transitions. [2024-09-13 00:35:59,194 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1058 transitions. Word has length 203 [2024-09-13 00:35:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:59,195 INFO L474 AbstractCegarLoop]: Abstraction has 781 states and 1058 transitions. [2024-09-13 00:35:59,195 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) [2024-09-13 00:35:59,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1058 transitions. [2024-09-13 00:35:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-09-13 00:35:59,197 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:59,197 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:59,210 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-13 00:35:59,401 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-13 00:35:59,401 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:59,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash 337297370, now seen corresponding path program 11 times [2024-09-13 00:35:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536463709] [2024-09-13 00:35:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:59,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2918857] [2024-09-13 00:35:59,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:35:59,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:59,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:59,417 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:59,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-13 00:35:59,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-13 00:35:59,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:59,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 00:35:59,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:36:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 97 proven. 173 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2024-09-13 00:36:03,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:13,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:13,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536463709] [2024-09-13 00:36:13,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:13,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2918857] [2024-09-13 00:36:13,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2918857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:36:13,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:36:13,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:36:13,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609544068] [2024-09-13 00:36:13,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:13,057 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:36:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:36:13,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=1, NotChecked=0, Total=812 [2024-09-13 00:36:13,058 INFO L87 Difference]: Start difference. First operand 781 states and 1058 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 11 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) [2024-09-13 00:36:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:36:23,085 INFO L93 Difference]: Finished difference Result 841 states and 1145 transitions. [2024-09-13 00:36:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:36:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 11 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 203 [2024-09-13 00:36:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:36:23,089 INFO L225 Difference]: With dead ends: 841 [2024-09-13 00:36:23,089 INFO L226 Difference]: Without dead ends: 834 [2024-09-13 00:36:23,090 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=186, Invalid=1373, Unknown=1, NotChecked=0, Total=1560 [2024-09-13 00:36:23,090 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 41 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:36:23,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 980 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-09-13 00:36:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2024-09-13 00:36:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 789. [2024-09-13 00:36:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 422 states have (on average 1.1374407582938388) internal successors, (480), 430 states have internal predecessors, (480), 293 states have call successors, (293), 74 states have call predecessors, (293), 73 states have return successors, (291), 284 states have call predecessors, (291), 291 states have call successors, (291) [2024-09-13 00:36:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1064 transitions. [2024-09-13 00:36:24,493 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1064 transitions. Word has length 203 [2024-09-13 00:36:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:36:24,494 INFO L474 AbstractCegarLoop]: Abstraction has 789 states and 1064 transitions. [2024-09-13 00:36:24,494 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 11 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) [2024-09-13 00:36:24,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1064 transitions. [2024-09-13 00:36:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2024-09-13 00:36:24,495 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:36:24,496 INFO L216 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:36:24,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-13 00:36:24,699 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-13 00:36:24,699 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:36:24,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1772388170, now seen corresponding path program 13 times [2024-09-13 00:36:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:36:24,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849864958] [2024-09-13 00:36:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:36:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:36:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:36:24,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719552865] [2024-09-13 00:36:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:36:24,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:36:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:36:24,726 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:36:24,727 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-13 00:36:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:36:24,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-13 00:36:24,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:36:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 257 proven. 240 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2024-09-13 00:36:31,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:31,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849864958] [2024-09-13 00:36:31,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:31,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719552865] [2024-09-13 00:36:31,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719552865] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:36:31,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:36:31,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-13 00:36:31,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852903301] [2024-09-13 00:36:31,766 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:31,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:36:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:36:31,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:36:31,767 INFO L87 Difference]: Start difference. First operand 789 states and 1064 transitions. Second operand has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 19 states have internal predecessors, (42), 13 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 12 states have call successors, (38) [2024-09-13 00:36:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:36:37,220 INFO L93 Difference]: Finished difference Result 860 states and 1164 transitions. [2024-09-13 00:36:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 00:36:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 19 states have internal predecessors, (42), 13 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 12 states have call successors, (38) Word has length 219 [2024-09-13 00:36:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:36:37,223 INFO L225 Difference]: With dead ends: 860 [2024-09-13 00:36:37,224 INFO L226 Difference]: Without dead ends: 858 [2024-09-13 00:36:37,224 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 00:36:37,224 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 50 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:36:37,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 831 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-13 00:36:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2024-09-13 00:36:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 803. [2024-09-13 00:36:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 430 states have (on average 1.1372093023255814) internal successors, (489), 438 states have internal predecessors, (489), 297 states have call successors, (297), 76 states have call predecessors, (297), 75 states have return successors, (295), 288 states have call predecessors, (295), 295 states have call successors, (295) [2024-09-13 00:36:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1081 transitions. [2024-09-13 00:36:38,692 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1081 transitions. Word has length 219 [2024-09-13 00:36:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:36:38,693 INFO L474 AbstractCegarLoop]: Abstraction has 803 states and 1081 transitions. [2024-09-13 00:36:38,693 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 19 states have internal predecessors, (42), 13 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 12 states have call successors, (38) [2024-09-13 00:36:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1081 transitions. [2024-09-13 00:36:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-09-13 00:36:38,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:36:38,695 INFO L216 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 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] [2024-09-13 00:36:38,707 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-13 00:36:38,895 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-13 00:36:38,895 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:36:38,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1534598350, now seen corresponding path program 14 times [2024-09-13 00:36:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:36:38,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309082557] [2024-09-13 00:36:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:36:38,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:36:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:36:38,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577507315] [2024-09-13 00:36:38,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:36:38,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:36:38,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:36:38,913 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:36:38,914 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-13 00:36:39,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:36:39,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:36:39,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-13 00:36:39,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:36:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 157 proven. 186 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2024-09-13 00:36:41,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:42,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:42,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309082557] [2024-09-13 00:36:42,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:42,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577507315] [2024-09-13 00:36:42,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577507315] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:36:42,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:36:42,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 00:36:42,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713684075] [2024-09-13 00:36:42,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:42,165 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:36:42,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:36:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:36:42,165 INFO L87 Difference]: Start difference. First operand 803 states and 1081 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) [2024-09-13 00:36:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:36:49,249 INFO L93 Difference]: Finished difference Result 868 states and 1177 transitions. [2024-09-13 00:36:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 00:36:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) Word has length 222 [2024-09-13 00:36:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:36:49,253 INFO L225 Difference]: With dead ends: 868 [2024-09-13 00:36:49,253 INFO L226 Difference]: Without dead ends: 866 [2024-09-13 00:36:49,253 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:36:49,254 INFO L434 NwaCegarLoop]: 67 mSDtfsCounter, 57 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:36:49,254 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 759 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-09-13 00:36:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2024-09-13 00:36:50,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 809. [2024-09-13 00:36:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 432 states have (on average 1.1388888888888888) internal successors, (492), 440 states have internal predecessors, (492), 301 states have call successors, (301), 76 states have call predecessors, (301), 75 states have return successors, (299), 292 states have call predecessors, (299), 299 states have call successors, (299) [2024-09-13 00:36:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1092 transitions. [2024-09-13 00:36:50,793 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1092 transitions. Word has length 222 [2024-09-13 00:36:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:36:50,793 INFO L474 AbstractCegarLoop]: Abstraction has 809 states and 1092 transitions. [2024-09-13 00:36:50,793 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) [2024-09-13 00:36:50,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1092 transitions. [2024-09-13 00:36:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-09-13 00:36:50,795 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:36:50,795 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:36:50,808 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-13 00:36:50,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-13 00:36:50,996 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:36:50,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -324643877, now seen corresponding path program 12 times [2024-09-13 00:36:50,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:36:50,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533408906] [2024-09-13 00:36:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:36:50,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:36:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:36:51,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779181405] [2024-09-13 00:36:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:36:51,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:36:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:36:51,013 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:36:51,014 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-13 00:36:51,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 00:36:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:36:51,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 00:36:51,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:36:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 211 proven. 180 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2024-09-13 00:36:55,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:57,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533408906] [2024-09-13 00:36:57,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779181405] [2024-09-13 00:36:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779181405] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:36:57,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:36:57,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-13 00:36:57,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752730926] [2024-09-13 00:36:57,449 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:57,449 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:36:57,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:36:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-09-13 00:36:57,450 INFO L87 Difference]: Start difference. First operand 809 states and 1092 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-13 00:37:01,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:06,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:11,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:37:17,160 INFO L93 Difference]: Finished difference Result 923 states and 1261 transitions. [2024-09-13 00:37:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:37:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) Word has length 225 [2024-09-13 00:37:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:37:17,164 INFO L225 Difference]: With dead ends: 923 [2024-09-13 00:37:17,164 INFO L226 Difference]: Without dead ends: 916 [2024-09-13 00:37:17,165 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:37:17,165 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 20 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:37:17,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 692 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 639 Invalid, 1 Unknown, 0 Unchecked, 16.8s Time] [2024-09-13 00:37:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2024-09-13 00:37:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 850. [2024-09-13 00:37:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 453 states have (on average 1.1324503311258278) internal successors, (513), 463 states have internal predecessors, (513), 317 states have call successors, (317), 80 states have call predecessors, (317), 79 states have return successors, (315), 306 states have call predecessors, (315), 315 states have call successors, (315) [2024-09-13 00:37:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1145 transitions. [2024-09-13 00:37:18,878 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1145 transitions. Word has length 225 [2024-09-13 00:37:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:37:18,878 INFO L474 AbstractCegarLoop]: Abstraction has 850 states and 1145 transitions. [2024-09-13 00:37:18,878 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-13 00:37:18,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1145 transitions. [2024-09-13 00:37:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-09-13 00:37:18,880 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:37:18,880 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 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] [2024-09-13 00:37:18,893 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-13 00:37:19,085 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-13 00:37:19,085 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:37:19,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 957873661, now seen corresponding path program 13 times [2024-09-13 00:37:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:37:19,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621111895] [2024-09-13 00:37:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:37:19,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:37:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:37:19,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833717419] [2024-09-13 00:37:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:37:19,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:37:19,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:37:19,103 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:37:19,103 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-13 00:37:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:37:19,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-13 00:37:19,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:37:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 173 proven. 269 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2024-09-13 00:37:20,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:37:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 239 proven. 182 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2024-09-13 00:37:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:37:25,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621111895] [2024-09-13 00:37:25,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:37:25,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833717419] [2024-09-13 00:37:25,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833717419] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:37:25,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:37:25,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 37 [2024-09-13 00:37:25,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843295041] [2024-09-13 00:37:25,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:37:25,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-13 00:37:25,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:37:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-13 00:37:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:37:25,230 INFO L87 Difference]: Start difference. First operand 850 states and 1145 transitions. Second operand has 37 states, 35 states have (on average 2.142857142857143) internal successors, (75), 33 states have internal predecessors, (75), 21 states have call successors, (74), 3 states have call predecessors, (74), 3 states have return successors, (73), 19 states have call predecessors, (73), 19 states have call successors, (73) [2024-09-13 00:37:32,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:37:40,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:38:19,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:38:21,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:38:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:38:23,846 INFO L93 Difference]: Finished difference Result 1117 states and 1566 transitions. [2024-09-13 00:38:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-09-13 00:38:23,846 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.142857142857143) internal successors, (75), 33 states have internal predecessors, (75), 21 states have call successors, (74), 3 states have call predecessors, (74), 3 states have return successors, (73), 19 states have call predecessors, (73), 19 states have call successors, (73) Word has length 228 [2024-09-13 00:38:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:38:23,850 INFO L225 Difference]: With dead ends: 1117 [2024-09-13 00:38:23,851 INFO L226 Difference]: Without dead ends: 1109 [2024-09-13 00:38:23,851 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=1544, Invalid=7576, Unknown=0, NotChecked=0, Total=9120 [2024-09-13 00:38:23,852 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 205 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:38:23,852 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1267 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 20.4s Time] [2024-09-13 00:38:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2024-09-13 00:38:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 893. [2024-09-13 00:38:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 478 states have (on average 1.1317991631799162) internal successors, (541), 487 states have internal predecessors, (541), 329 states have call successors, (329), 86 states have call predecessors, (329), 85 states have return successors, (327), 319 states have call predecessors, (327), 327 states have call successors, (327) [2024-09-13 00:38:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1197 transitions. [2024-09-13 00:38:25,905 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1197 transitions. Word has length 228 [2024-09-13 00:38:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:38:25,905 INFO L474 AbstractCegarLoop]: Abstraction has 893 states and 1197 transitions. [2024-09-13 00:38:25,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.142857142857143) internal successors, (75), 33 states have internal predecessors, (75), 21 states have call successors, (74), 3 states have call predecessors, (74), 3 states have return successors, (73), 19 states have call predecessors, (73), 19 states have call successors, (73) [2024-09-13 00:38:25,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1197 transitions. [2024-09-13 00:38:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-09-13 00:38:25,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:38:25,908 INFO L216 NwaCegarLoop]: trace histogram [36, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:38:25,920 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-13 00:38:26,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-13 00:38:26,108 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:38:26,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:26,109 INFO L85 PathProgramCache]: Analyzing trace with hash -243518231, now seen corresponding path program 15 times [2024-09-13 00:38:26,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:38:26,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154728983] [2024-09-13 00:38:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:38:26,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:38:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:38:26,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519622574] [2024-09-13 00:38:26,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:38:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:38:26,130 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:38:26,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-13 00:38:26,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:38:26,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:38:26,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-13 00:38:26,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:38:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2725 backedges. 379 proven. 143 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2024-09-13 00:38:31,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:38:43,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:38:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154728983] [2024-09-13 00:38:43,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:38:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519622574] [2024-09-13 00:38:43,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519622574] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:38:43,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:38:43,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:38:43,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294971534] [2024-09-13 00:38:43,066 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:38:43,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:38:43,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:38:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:38:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=608, Unknown=1, NotChecked=0, Total=756 [2024-09-13 00:38:43,067 INFO L87 Difference]: Start difference. First operand 893 states and 1197 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:38:47,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:38:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:38:50,526 INFO L93 Difference]: Finished difference Result 963 states and 1285 transitions. [2024-09-13 00:38:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:38:50,527 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 241 [2024-09-13 00:38:50,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:38:50,530 INFO L225 Difference]: With dead ends: 963 [2024-09-13 00:38:50,530 INFO L226 Difference]: Without dead ends: 961 [2024-09-13 00:38:50,531 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=195, Invalid=796, Unknown=1, NotChecked=0, Total=992 [2024-09-13 00:38:50,531 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 20 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:38:50,531 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 596 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-09-13 00:38:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-09-13 00:38:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 913. [2024-09-13 00:38:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 493 states have (on average 1.127789046653144) internal successors, (556), 502 states have internal predecessors, (556), 329 states have call successors, (329), 91 states have call predecessors, (329), 90 states have return successors, (327), 319 states have call predecessors, (327), 327 states have call successors, (327) [2024-09-13 00:38:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1212 transitions. [2024-09-13 00:38:52,686 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1212 transitions. Word has length 241 [2024-09-13 00:38:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:38:52,686 INFO L474 AbstractCegarLoop]: Abstraction has 913 states and 1212 transitions. [2024-09-13 00:38:52,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:38:52,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1212 transitions. [2024-09-13 00:38:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-09-13 00:38:52,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:38:52,688 INFO L216 NwaCegarLoop]: trace histogram [36, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 5, 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] [2024-09-13 00:38:52,700 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-13 00:38:52,889 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:52,889 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:38:52,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash 530519917, now seen corresponding path program 16 times [2024-09-13 00:38:52,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:38:52,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545449332] [2024-09-13 00:38:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:38:52,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:38:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:38:52,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579516038] [2024-09-13 00:38:52,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:38:52,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:52,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:38:52,917 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:38:52,918 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-13 00:38:53,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:38:53,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:38:53,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:38:53,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:38:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 177 proven. 233 refuted. 0 times theorem prover too weak. 2323 trivial. 0 not checked. [2024-09-13 00:38:56,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:38:56,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:38:56,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545449332] [2024-09-13 00:38:56,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:38:56,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579516038] [2024-09-13 00:38:56,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579516038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:38:56,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:38:56,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-13 00:38:56,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788693776] [2024-09-13 00:38:56,686 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:38:56,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:38:56,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:38:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:38:56,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:38:56,686 INFO L87 Difference]: Start difference. First operand 913 states and 1212 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 13 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (42), 13 states have call predecessors, (42), 12 states have call successors, (42) [2024-09-13 00:39:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:39:05,433 INFO L93 Difference]: Finished difference Result 979 states and 1309 transitions. [2024-09-13 00:39:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 00:39:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 13 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (42), 13 states have call predecessors, (42), 12 states have call successors, (42) Word has length 244 [2024-09-13 00:39:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:39:05,437 INFO L225 Difference]: With dead ends: 979 [2024-09-13 00:39:05,438 INFO L226 Difference]: Without dead ends: 977 [2024-09-13 00:39:05,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 00:39:05,438 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 57 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:39:05,438 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 995 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-09-13 00:39:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2024-09-13 00:39:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 919. [2024-09-13 00:39:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 495 states have (on average 1.1292929292929292) internal successors, (559), 504 states have internal predecessors, (559), 333 states have call successors, (333), 91 states have call predecessors, (333), 90 states have return successors, (331), 323 states have call predecessors, (331), 331 states have call successors, (331) [2024-09-13 00:39:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1223 transitions. [2024-09-13 00:39:07,572 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1223 transitions. Word has length 244 [2024-09-13 00:39:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:39:07,572 INFO L474 AbstractCegarLoop]: Abstraction has 919 states and 1223 transitions. [2024-09-13 00:39:07,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 13 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (42), 13 states have call predecessors, (42), 12 states have call successors, (42) [2024-09-13 00:39:07,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:39:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1223 transitions. [2024-09-13 00:39:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-09-13 00:39:07,575 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:39:07,575 INFO L216 NwaCegarLoop]: trace histogram [36, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 5, 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] [2024-09-13 00:39:07,593 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-13 00:39:07,775 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-09-13 00:39:07,775 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:39:07,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:39:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -864663217, now seen corresponding path program 17 times [2024-09-13 00:39:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:39:07,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677270646] [2024-09-13 00:39:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:39:07,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:39:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:39:07,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943539149] [2024-09-13 00:39:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:39:07,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:39:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:39:07,799 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:39:07,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-13 00:39:08,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-13 00:39:08,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:39:08,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 00:39:08,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:39:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 171 proven. 224 refuted. 0 times theorem prover too weak. 2338 trivial. 0 not checked. [2024-09-13 00:39:11,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:39:13,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:39:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677270646] [2024-09-13 00:39:13,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:39:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943539149] [2024-09-13 00:39:13,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943539149] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:39:13,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:39:13,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:39:13,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473593272] [2024-09-13 00:39:13,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:39:13,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:39:13,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:39:13,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:39:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2024-09-13 00:39:13,744 INFO L87 Difference]: Start difference. First operand 919 states and 1223 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 12 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 12 states have call predecessors, (42), 11 states have call successors, (42) [2024-09-13 00:39:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:39:21,084 INFO L93 Difference]: Finished difference Result 985 states and 1320 transitions. [2024-09-13 00:39:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 00:39:21,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 12 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 12 states have call predecessors, (42), 11 states have call successors, (42) Word has length 244 [2024-09-13 00:39:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:39:21,088 INFO L225 Difference]: With dead ends: 985 [2024-09-13 00:39:21,088 INFO L226 Difference]: Without dead ends: 983 [2024-09-13 00:39:21,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 00:39:21,089 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 46 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:39:21,089 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1218 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-13 00:39:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2024-09-13 00:39:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 925. [2024-09-13 00:39:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 497 states have (on average 1.130784708249497) internal successors, (562), 506 states have internal predecessors, (562), 337 states have call successors, (337), 91 states have call predecessors, (337), 90 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2024-09-13 00:39:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1234 transitions. [2024-09-13 00:39:23,235 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1234 transitions. Word has length 244 [2024-09-13 00:39:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:39:23,236 INFO L474 AbstractCegarLoop]: Abstraction has 925 states and 1234 transitions. [2024-09-13 00:39:23,236 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 12 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 12 states have call predecessors, (42), 11 states have call successors, (42) [2024-09-13 00:39:23,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:39:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1234 transitions. [2024-09-13 00:39:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-09-13 00:39:23,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:39:23,238 INFO L216 NwaCegarLoop]: trace histogram [36, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 5, 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] [2024-09-13 00:39:23,245 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-13 00:39:23,442 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:39:23,444 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:39:23,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:39:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1620959021, now seen corresponding path program 18 times [2024-09-13 00:39:23,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:39:23,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9363141] [2024-09-13 00:39:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:39:23,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:39:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:39:23,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925409853] [2024-09-13 00:39:23,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:39:23,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:39:23,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:39:23,482 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:39:23,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-13 00:39:23,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:39:23,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:39:23,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 00:39:23,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:39:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 423 proven. 208 refuted. 0 times theorem prover too weak. 2102 trivial. 0 not checked. [2024-09-13 00:39:35,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:39:36,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:39:36,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9363141] [2024-09-13 00:39:36,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:39:36,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925409853] [2024-09-13 00:39:36,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925409853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:39:36,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:39:36,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:39:36,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143656534] [2024-09-13 00:39:36,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:39:36,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:39:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:39:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:39:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2024-09-13 00:39:36,026 INFO L87 Difference]: Start difference. First operand 925 states and 1234 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-13 00:39:40,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:39:48,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:39:52,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:39:56,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:00,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:04,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:08,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:12,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:16,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:20,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:24,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:28,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:32,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:36,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:45,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:40:49,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] Killed by 15