./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --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 a9b967e5 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_valuebound20.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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --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-a9b967e-m [2024-09-11 19:54:13,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:54:13,581 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:54:13,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:54:13,588 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:54:13,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:54:13,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:54:13,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:54:13,621 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:54:13,622 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:54:13,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:54:13,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:54:13,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:54:13,626 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:54:13,626 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:54:13,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:54:13,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:54:13,627 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:54:13,627 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:54:13,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:54:13,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:54:13,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:54:13,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:54:13,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:54:13,632 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:54:13,632 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:54:13,633 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:54:13,633 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:54:13,633 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:54:13,633 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:54:13,633 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:54:13,634 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:54:13,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:54:13,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:54:13,634 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:54:13,634 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:54:13,634 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:54:13,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:54:13,635 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:54:13,635 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:54:13,635 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:54:13,636 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:54:13,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:54:13,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:54:13,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:54:13,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:54:13,883 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:54:13,883 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:54:13,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2024-09-11 19:54:15,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:54:15,475 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:54:15,475 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2024-09-11 19:54:15,483 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b8f18b3d0/03b0d5edc09e4d53a10f690849e9a17f/FLAG5b90f945f [2024-09-11 19:54:15,851 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b8f18b3d0/03b0d5edc09e4d53a10f690849e9a17f [2024-09-11 19:54:15,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:54:15,855 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:54:15,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:54:15,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:54:15,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:54:15,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:54:15" (1/1) ... [2024-09-11 19:54:15,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522dbdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:15, skipping insertion in model container [2024-09-11 19:54:15,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:54:15" (1/1) ... [2024-09-11 19:54:15,885 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:54:16,030 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_valuebound20.c[490,503] [2024-09-11 19:54:16,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:54:16,071 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:54:16,080 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_valuebound20.c[490,503] [2024-09-11 19:54:16,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:54:16,106 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:54:16,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16 WrapperNode [2024-09-11 19:54:16,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:54:16,108 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:54:16,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:54:16,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:54:16,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,147 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-09-11 19:54:16,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:54:16,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:54:16,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:54:16,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:54:16,158 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,160 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,172 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]. [2024-09-11 19:54:16,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,173 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,182 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:54:16,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:54:16,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:54:16,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:54:16,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (1/1) ... [2024-09-11 19:54:16,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:54:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:16,223 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) [2024-09-11 19:54:16,227 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 [2024-09-11 19:54:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:54:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 19:54:16,269 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 19:54:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:54:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:54:16,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:54:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:54:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:54:16,328 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:54:16,330 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:54:16,483 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-11 19:54:16,483 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:54:16,508 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:54:16,508 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 19:54:16,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:54:16 BoogieIcfgContainer [2024-09-11 19:54:16,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:54:16,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:54:16,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:54:16,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:54:16,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:54:15" (1/3) ... [2024-09-11 19:54:16,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52466d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:54:16, skipping insertion in model container [2024-09-11 19:54:16,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:54:16" (2/3) ... [2024-09-11 19:54:16,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52466d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:54:16, skipping insertion in model container [2024-09-11 19:54:16,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:54:16" (3/3) ... [2024-09-11 19:54:16,539 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2024-09-11 19:54:16,566 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:54:16,578 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:54:16,647 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:54:16,655 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;@5a019d71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:54:16,656 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:54:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:54:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:54:16,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:16,675 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] [2024-09-11 19:54:16,675 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:16,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535902, now seen corresponding path program 1 times [2024-09-11 19:54:16,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:16,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172712313] [2024-09-11 19:54:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:16,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:16,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:16,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:16,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:16,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:16,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:54:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:16,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:54:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:54:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:16,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172712313] [2024-09-11 19:54:16,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172712313] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:16,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:16,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:54:16,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134616558] [2024-09-11 19:54:16,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:16,957 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:54:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:54:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:54:16,992 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:54:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:17,023 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-09-11 19:54:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:54:17,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-09-11 19:54:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:17,032 INFO L225 Difference]: With dead ends: 62 [2024-09-11 19:54:17,032 INFO L226 Difference]: Without dead ends: 30 [2024-09-11 19:54:17,035 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:54:17,038 INFO L434 NwaCegarLoop]: 41 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, 41 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 [2024-09-11 19:54:17,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-11 19:54:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-11 19:54:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 19:54:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-09-11 19:54:17,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2024-09-11 19:54:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:17,085 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-09-11 19:54:17,085 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:54:17,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-09-11 19:54:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 19:54:17,089 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:17,089 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] [2024-09-11 19:54:17,089 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:54:17,089 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:17,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -279596905, now seen corresponding path program 1 times [2024-09-11 19:54:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384480247] [2024-09-11 19:54:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:54:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:54:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:54:17,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:17,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384480247] [2024-09-11 19:54:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384480247] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181675760] [2024-09-11 19:54:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:17,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:17,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:17,477 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) [2024-09-11 19:54:17,480 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:54:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:17,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-11 19:54:17,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:54:17,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:18,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181675760] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:18,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:54:18,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-11 19:54:18,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322298948] [2024-09-11 19:54:18,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:18,013 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:54:18,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:18,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:54:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:54:18,017 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 19:54:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:18,347 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-09-11 19:54:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:54:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2024-09-11 19:54:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:18,349 INFO L225 Difference]: With dead ends: 51 [2024-09-11 19:54:18,351 INFO L226 Difference]: Without dead ends: 43 [2024-09-11 19:54:18,352 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:54:18,353 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:18,355 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 187 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:54:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-11 19:54:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-11 19:54:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:54:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2024-09-11 19:54:18,378 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 39 [2024-09-11 19:54:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:18,379 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2024-09-11 19:54:18,379 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 19:54:18,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2024-09-11 19:54:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 19:54:18,382 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:18,382 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] [2024-09-11 19:54:18,401 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:18,582 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 [2024-09-11 19:54:18,583 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:18,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash -76887146, now seen corresponding path program 1 times [2024-09-11 19:54:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:18,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729893200] [2024-09-11 19:54:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:18,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:18,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407516460] [2024-09-11 19:54:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:18,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:18,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:18,620 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) [2024-09-11 19:54:18,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:54:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:18,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:54:18,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:54:18,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:54:18,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729893200] [2024-09-11 19:54:18,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407516460] [2024-09-11 19:54:18,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407516460] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:18,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:18,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:18,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584764793] [2024-09-11 19:54:18,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:18,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:18,709 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 19:54:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:18,763 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2024-09-11 19:54:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:54:18,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-09-11 19:54:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:18,765 INFO L225 Difference]: With dead ends: 61 [2024-09-11 19:54:18,765 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 19:54:18,765 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:18,766 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:18,766 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 19:54:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-09-11 19:54:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:54:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2024-09-11 19:54:18,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2024-09-11 19:54:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:18,791 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2024-09-11 19:54:18,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 19:54:18,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2024-09-11 19:54:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-11 19:54:18,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:18,793 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] [2024-09-11 19:54:18,812 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:54:18,993 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 [2024-09-11 19:54:18,994 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:18,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash 345761675, now seen corresponding path program 1 times [2024-09-11 19:54:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:18,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381511127] [2024-09-11 19:54:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:19,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378681716] [2024-09-11 19:54:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:19,014 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) [2024-09-11 19:54:19,019 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:54:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:19,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:54:19,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:54:19,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:54:19,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381511127] [2024-09-11 19:54:19,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378681716] [2024-09-11 19:54:19,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378681716] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:19,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:19,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:19,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469089535] [2024-09-11 19:54:19,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:19,172 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:19,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:19,173 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:54:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:19,230 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-09-11 19:54:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:54:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2024-09-11 19:54:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:19,234 INFO L225 Difference]: With dead ends: 57 [2024-09-11 19:54:19,234 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 19:54:19,234 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:54:19,235 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:19,236 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 19:54:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-09-11 19:54:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:54:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-09-11 19:54:19,248 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 45 [2024-09-11 19:54:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:19,249 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-09-11 19:54:19,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:54:19,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-09-11 19:54:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-11 19:54:19,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:19,251 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] [2024-09-11 19:54:19,267 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:19,451 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 [2024-09-11 19:54:19,452 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:19,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2047387093, now seen corresponding path program 1 times [2024-09-11 19:54:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:19,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768234509] [2024-09-11 19:54:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:19,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555658420] [2024-09-11 19:54:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:19,475 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) [2024-09-11 19:54:19,476 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:54:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:19,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-11 19:54:19,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 19:54:19,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:19,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:19,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768234509] [2024-09-11 19:54:19,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:19,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555658420] [2024-09-11 19:54:19,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555658420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:19,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:54:19,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-11 19:54:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217747532] [2024-09-11 19:54:19,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:19,869 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 19:54:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 19:54:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:54:19,871 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-11 19:54:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:19,992 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-09-11 19:54:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:54:19,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2024-09-11 19:54:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:19,995 INFO L225 Difference]: With dead ends: 61 [2024-09-11 19:54:19,995 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 19:54:19,996 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:54:19,998 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:19,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 19:54:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-11 19:54:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:54:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-09-11 19:54:20,015 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 55 [2024-09-11 19:54:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:20,017 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-09-11 19:54:20,017 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-11 19:54:20,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-09-11 19:54:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-11 19:54:20,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:20,020 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] [2024-09-11 19:54:20,038 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:54:20,220 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 [2024-09-11 19:54:20,221 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:20,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1705825109, now seen corresponding path program 1 times [2024-09-11 19:54:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:20,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220258970] [2024-09-11 19:54:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946272930] [2024-09-11 19:54:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:20,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:20,245 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) [2024-09-11 19:54:20,247 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:54:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:20,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:54:20,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:54:20,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:54:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220258970] [2024-09-11 19:54:20,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:20,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946272930] [2024-09-11 19:54:20,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946272930] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:20,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:54:20,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-11 19:54:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511977582] [2024-09-11 19:54:20,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:20,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:54:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:54:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:54:20,489 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-11 19:54:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:20,623 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2024-09-11 19:54:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:54:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2024-09-11 19:54:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:20,626 INFO L225 Difference]: With dead ends: 86 [2024-09-11 19:54:20,626 INFO L226 Difference]: Without dead ends: 84 [2024-09-11 19:54:20,626 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:54:20,627 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:20,627 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 180 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-11 19:54:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2024-09-11 19:54:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:54:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-11 19:54:20,651 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 62 [2024-09-11 19:54:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:20,651 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-11 19:54:20,651 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-11 19:54:20,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-11 19:54:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-11 19:54:20,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:20,653 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] [2024-09-11 19:54:20,670 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 19:54:20,857 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 [2024-09-11 19:54:20,858 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:20,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 392643903, now seen corresponding path program 1 times [2024-09-11 19:54:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303558003] [2024-09-11 19:54:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:20,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:20,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:20,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:54:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:54:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:54:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 19:54:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 19:54:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:54:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 19:54:21,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303558003] [2024-09-11 19:54:21,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303558003] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063061574] [2024-09-11 19:54:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:21,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:21,064 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) [2024-09-11 19:54:21,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:54:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:54:21,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 19:54:21,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 19:54:21,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063061574] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:21,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:54:21,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-11 19:54:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922462093] [2024-09-11 19:54:21,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:21,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:54:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:54:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:54:21,268 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-11 19:54:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:21,474 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2024-09-11 19:54:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:54:21,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2024-09-11 19:54:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:21,476 INFO L225 Difference]: With dead ends: 101 [2024-09-11 19:54:21,476 INFO L226 Difference]: Without dead ends: 93 [2024-09-11 19:54:21,477 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:54:21,477 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:21,478 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 283 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-11 19:54:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2024-09-11 19:54:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:54:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2024-09-11 19:54:21,517 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2024-09-11 19:54:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:21,518 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2024-09-11 19:54:21,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-11 19:54:21,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2024-09-11 19:54:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-11 19:54:21,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:21,520 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] [2024-09-11 19:54:21,533 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 19:54:21,720 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 [2024-09-11 19:54:21,721 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:21,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash -45785549, now seen corresponding path program 1 times [2024-09-11 19:54:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:21,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867279951] [2024-09-11 19:54:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237622501] [2024-09-11 19:54:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:21,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:21,754 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) [2024-09-11 19:54:21,757 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:54:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:21,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-11 19:54:21,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-11 19:54:21,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:21,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:21,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867279951] [2024-09-11 19:54:21,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:21,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237622501] [2024-09-11 19:54:21,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237622501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:21,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:54:21,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-11 19:54:21,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064532586] [2024-09-11 19:54:21,983 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:21,983 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:54:21,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:54:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:54:21,984 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-11 19:54:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:22,109 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2024-09-11 19:54:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:54:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-09-11 19:54:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:22,111 INFO L225 Difference]: With dead ends: 119 [2024-09-11 19:54:22,111 INFO L226 Difference]: Without dead ends: 116 [2024-09-11 19:54:22,112 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:54:22,112 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:22,112 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 190 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-11 19:54:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-09-11 19:54:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 62 states have internal predecessors, (73), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-11 19:54:22,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2024-09-11 19:54:22,160 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 70 [2024-09-11 19:54:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:22,161 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2024-09-11 19:54:22,161 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-11 19:54:22,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2024-09-11 19:54:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-11 19:54:22,165 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:22,165 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] [2024-09-11 19:54:22,208 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:22,369 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 [2024-09-11 19:54:22,370 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:22,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1519552206, now seen corresponding path program 2 times [2024-09-11 19:54:22,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:22,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512555103] [2024-09-11 19:54:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:22,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936013900] [2024-09-11 19:54:22,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:54:22,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:22,407 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) [2024-09-11 19:54:22,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:54:22,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:54:22,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:54:22,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-11 19:54:22,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-11 19:54:22,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:22,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:22,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512555103] [2024-09-11 19:54:22,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936013900] [2024-09-11 19:54:22,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936013900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:22,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:54:22,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-11 19:54:22,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720552189] [2024-09-11 19:54:22,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:22,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:54:22,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:54:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:54:22,726 INFO L87 Difference]: Start difference. First operand 113 states and 161 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 19:54:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:22,894 INFO L93 Difference]: Finished difference Result 125 states and 171 transitions. [2024-09-11 19:54:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:54:22,894 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-09-11 19:54:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:22,896 INFO L225 Difference]: With dead ends: 125 [2024-09-11 19:54:22,896 INFO L226 Difference]: Without dead ends: 123 [2024-09-11 19:54:22,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:54:22,897 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:22,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 207 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:54:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-11 19:54:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-09-11 19:54:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-11 19:54:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2024-09-11 19:54:22,942 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 75 [2024-09-11 19:54:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:22,943 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2024-09-11 19:54:22,943 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, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 19:54:22,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2024-09-11 19:54:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-11 19:54:22,944 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:22,946 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] [2024-09-11 19:54:22,963 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 19:54:23,146 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 [2024-09-11 19:54:23,147 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:23,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1881497901, now seen corresponding path program 3 times [2024-09-11 19:54:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:23,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074117828] [2024-09-11 19:54:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:23,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:23,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985290272] [2024-09-11 19:54:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:54:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:23,177 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) [2024-09-11 19:54:23,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:54:23,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:54:23,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:54:23,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-11 19:54:23,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-11 19:54:24,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:32,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074117828] [2024-09-11 19:54:32,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985290272] [2024-09-11 19:54:32,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985290272] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:32,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:54:32,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 19:54:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187479338] [2024-09-11 19:54:32,999 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:32,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:54:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:32,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:54:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:54:33,000 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-11 19:54:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:33,503 INFO L93 Difference]: Finished difference Result 129 states and 174 transitions. [2024-09-11 19:54:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:54:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2024-09-11 19:54:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:33,505 INFO L225 Difference]: With dead ends: 129 [2024-09-11 19:54:33,505 INFO L226 Difference]: Without dead ends: 127 [2024-09-11 19:54:33,506 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:54:33,506 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:33,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 253 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:54:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-11 19:54:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-11 19:54:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-11 19:54:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2024-09-11 19:54:33,537 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 80 [2024-09-11 19:54:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:33,538 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2024-09-11 19:54:33,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-11 19:54:33,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2024-09-11 19:54:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-11 19:54:33,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:33,540 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] [2024-09-11 19:54:33,558 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-11 19:54:33,743 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 [2024-09-11 19:54:33,744 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:33,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1305329662, now seen corresponding path program 1 times [2024-09-11 19:54:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:33,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187306925] [2024-09-11 19:54:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:33,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120778008] [2024-09-11 19:54:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:33,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:33,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:33,776 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) [2024-09-11 19:54:33,777 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:54:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:33,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-11 19:54:33,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-11 19:54:34,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-11 19:54:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187306925] [2024-09-11 19:54:35,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:35,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120778008] [2024-09-11 19:54:35,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120778008] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:54:35,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:54:35,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-11 19:54:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174945440] [2024-09-11 19:54:35,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:35,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:54:35,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:54:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:54:35,064 INFO L87 Difference]: Start difference. First operand 125 states and 170 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-11 19:54:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:37,552 INFO L93 Difference]: Finished difference Result 225 states and 333 transitions. [2024-09-11 19:54:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 19:54:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 86 [2024-09-11 19:54:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:37,555 INFO L225 Difference]: With dead ends: 225 [2024-09-11 19:54:37,555 INFO L226 Difference]: Without dead ends: 221 [2024-09-11 19:54:37,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:54:37,560 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 79 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:37,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 468 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-11 19:54:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-09-11 19:54:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2024-09-11 19:54:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 114 states have internal predecessors, (138), 94 states have call successors, (94), 12 states have call predecessors, (94), 12 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2024-09-11 19:54:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 324 transitions. [2024-09-11 19:54:37,648 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 324 transitions. Word has length 86 [2024-09-11 19:54:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:37,649 INFO L474 AbstractCegarLoop]: Abstraction has 218 states and 324 transitions. [2024-09-11 19:54:37,649 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-11 19:54:37,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 324 transitions. [2024-09-11 19:54:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-11 19:54:37,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:37,651 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] [2024-09-11 19:54:37,665 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:37,854 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 [2024-09-11 19:54:37,854 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:37,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:37,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1470837899, now seen corresponding path program 4 times [2024-09-11 19:54:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:37,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699811373] [2024-09-11 19:54:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:37,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:54:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:54:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:54:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:54:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:54:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:54:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:54:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 19:54:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 19:54:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:54:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-11 19:54:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-11 19:54:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-11 19:54:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-11 19:54:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:37,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-11 19:54:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-11 19:54:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699811373] [2024-09-11 19:54:38,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699811373] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:54:38,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:54:38,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:54:38,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571235130] [2024-09-11 19:54:38,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:54:38,002 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:54:38,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:54:38,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:54:38,003 INFO L87 Difference]: Start difference. First operand 218 states and 324 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 19:54:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:38,131 INFO L93 Difference]: Finished difference Result 271 states and 400 transitions. [2024-09-11 19:54:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:54:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2024-09-11 19:54:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:38,134 INFO L225 Difference]: With dead ends: 271 [2024-09-11 19:54:38,134 INFO L226 Difference]: Without dead ends: 197 [2024-09-11 19:54:38,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:54:38,135 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:38,136 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:54:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-11 19:54:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2024-09-11 19:54:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 97 states have internal predecessors, (111), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-11 19:54:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 265 transitions. [2024-09-11 19:54:38,223 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 265 transitions. Word has length 95 [2024-09-11 19:54:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:38,223 INFO L474 AbstractCegarLoop]: Abstraction has 185 states and 265 transitions. [2024-09-11 19:54:38,224 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 19:54:38,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 265 transitions. [2024-09-11 19:54:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-11 19:54:38,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:38,226 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] [2024-09-11 19:54:38,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-11 19:54:38,226 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:38,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:38,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1556724626, now seen corresponding path program 1 times [2024-09-11 19:54:38,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:38,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657617772] [2024-09-11 19:54:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:38,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:38,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313768955] [2024-09-11 19:54:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:38,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:38,261 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) [2024-09-11 19:54:38,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 19:54:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:54:38,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-11 19:54:38,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 74 proven. 35 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-11 19:54:39,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:55:08,399 WARN L293 SmtUtils]: Spent 8.77s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:55:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 26 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-11 19:55:44,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:55:44,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657617772] [2024-09-11 19:55:44,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:55:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313768955] [2024-09-11 19:55:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313768955] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:55:44,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:55:44,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2024-09-11 19:55:44,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63950242] [2024-09-11 19:55:44,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:55:44,606 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 19:55:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:55:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 19:55:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=487, Unknown=1, NotChecked=0, Total=600 [2024-09-11 19:55:44,607 INFO L87 Difference]: Start difference. First operand 185 states and 265 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-11 19:55:48,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:55:58,359 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:56:14,257 WARN L293 SmtUtils]: Spent 14.83s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:56:19,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:56:35,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:56:39,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:56:47,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:56:51,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:57:03,099 WARN L293 SmtUtils]: Spent 6.89s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:57:06,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:57:13,618 WARN L293 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:57:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:34,569 INFO L93 Difference]: Finished difference Result 209 states and 295 transitions. [2024-09-11 19:57:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 19:57:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) Word has length 102 [2024-09-11 19:57:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:34,571 INFO L225 Difference]: With dead ends: 209 [2024-09-11 19:57:34,571 INFO L226 Difference]: Without dead ends: 207 [2024-09-11 19:57:34,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 96.6s TimeCoverageRelationStatistics Valid=388, Invalid=1246, Unknown=6, NotChecked=0, Total=1640 [2024-09-11 19:57:34,572 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 82 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 118 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:34,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 350 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 489 Invalid, 4 Unknown, 0 Unchecked, 28.5s Time] [2024-09-11 19:57:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-11 19:57:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2024-09-11 19:57:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 108 states have internal predecessors, (122), 82 states have call successors, (82), 14 states have call predecessors, (82), 14 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2024-09-11 19:57:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 284 transitions. [2024-09-11 19:57:34,689 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 284 transitions. Word has length 102 [2024-09-11 19:57:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:34,689 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 284 transitions. [2024-09-11 19:57:34,689 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-11 19:57:34,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 284 transitions. [2024-09-11 19:57:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-09-11 19:57:34,691 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:34,691 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] [2024-09-11 19:57:34,709 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 19:57:34,892 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 [2024-09-11 19:57:34,892 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:34,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:34,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1903041589, now seen corresponding path program 1 times [2024-09-11 19:57:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:34,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774877288] [2024-09-11 19:57:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:34,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:57:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:57:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:57:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:57:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:57:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:57:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:57:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 19:57:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 19:57:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:57:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-11 19:57:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-11 19:57:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-11 19:57:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-11 19:57:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-11 19:57:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-11 19:57:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-11 19:57:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-11 19:57:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-11 19:57:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-11 19:57:35,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774877288] [2024-09-11 19:57:35,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774877288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:57:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435555908] [2024-09-11 19:57:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:35,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:35,090 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) [2024-09-11 19:57:35,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 19:57:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:35,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:57:35,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-11 19:57:35,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-11 19:57:35,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435555908] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:57:35,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:57:35,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-11 19:57:35,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536715562] [2024-09-11 19:57:35,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:35,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:57:35,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:35,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:57:35,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:57:35,279 INFO L87 Difference]: Start difference. First operand 201 states and 284 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-09-11 19:57:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:35,534 INFO L93 Difference]: Finished difference Result 227 states and 323 transitions. [2024-09-11 19:57:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:57:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 116 [2024-09-11 19:57:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:35,536 INFO L225 Difference]: With dead ends: 227 [2024-09-11 19:57:35,536 INFO L226 Difference]: Without dead ends: 215 [2024-09-11 19:57:35,537 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:57:35,537 INFO L434 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:35,537 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 318 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:57:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-11 19:57:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-11 19:57:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 81 states have call successors, (81), 13 states have call predecessors, (81), 13 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2024-09-11 19:57:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 278 transitions. [2024-09-11 19:57:35,701 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 278 transitions. Word has length 116 [2024-09-11 19:57:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:35,701 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 278 transitions. [2024-09-11 19:57:35,702 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-09-11 19:57:35,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:35,702 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 278 transitions. [2024-09-11 19:57:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-11 19:57:35,703 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:35,703 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] [2024-09-11 19:57:35,720 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 19:57:35,903 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 [2024-09-11 19:57:35,904 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:35,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -956526070, now seen corresponding path program 2 times [2024-09-11 19:57:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245879274] [2024-09-11 19:57:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:35,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233414731] [2024-09-11 19:57:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:57:35,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:35,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:35,927 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) [2024-09-11 19:57:35,937 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 19:57:36,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:57:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:36,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-11 19:57:36,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 61 proven. 50 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-09-11 19:57:36,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-09-11 19:57:36,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:36,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245879274] [2024-09-11 19:57:36,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:36,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233414731] [2024-09-11 19:57:36,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233414731] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:57:36,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:57:36,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-09-11 19:57:36,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488104422] [2024-09-11 19:57:36,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:36,705 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 19:57:36,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 19:57:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:57:36,706 INFO L87 Difference]: Start difference. First operand 196 states and 278 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 19:57:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:39,289 INFO L93 Difference]: Finished difference Result 230 states and 324 transitions. [2024-09-11 19:57:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:57:39,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 117 [2024-09-11 19:57:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:39,292 INFO L225 Difference]: With dead ends: 230 [2024-09-11 19:57:39,292 INFO L226 Difference]: Without dead ends: 227 [2024-09-11 19:57:39,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:57:39,293 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:39,294 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 476 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-11 19:57:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-11 19:57:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 202. [2024-09-11 19:57:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 107 states have (on average 1.158878504672897) internal successors, (124), 109 states have internal predecessors, (124), 79 states have call successors, (79), 15 states have call predecessors, (79), 15 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2024-09-11 19:57:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 281 transitions. [2024-09-11 19:57:39,413 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 281 transitions. Word has length 117 [2024-09-11 19:57:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:39,414 INFO L474 AbstractCegarLoop]: Abstraction has 202 states and 281 transitions. [2024-09-11 19:57:39,414 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 19:57:39,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 281 transitions. [2024-09-11 19:57:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-09-11 19:57:39,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:39,416 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] [2024-09-11 19:57:39,433 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 19:57:39,619 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 [2024-09-11 19:57:39,620 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:39,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash 457852880, now seen corresponding path program 3 times [2024-09-11 19:57:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:39,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642937238] [2024-09-11 19:57:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:39,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:39,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70923302] [2024-09-11 19:57:39,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:57:39,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:39,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:39,655 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) [2024-09-11 19:57:39,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 19:57:39,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:57:39,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:39,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 19:57:39,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-11 19:57:40,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642937238] [2024-09-11 19:57:40,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70923302] [2024-09-11 19:57:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70923302] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:57:40,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:57:40,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-11 19:57:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469007614] [2024-09-11 19:57:40,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:40,176 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:57:40,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:57:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:57:40,177 INFO L87 Difference]: Start difference. First operand 202 states and 281 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-11 19:57:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:40,570 INFO L93 Difference]: Finished difference Result 239 states and 329 transitions. [2024-09-11 19:57:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:57:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 119 [2024-09-11 19:57:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:40,573 INFO L225 Difference]: With dead ends: 239 [2024-09-11 19:57:40,573 INFO L226 Difference]: Without dead ends: 237 [2024-09-11 19:57:40,573 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:57:40,573 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:40,574 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 322 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:57:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-09-11 19:57:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2024-09-11 19:57:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 125 states have (on average 1.152) internal successors, (144), 127 states have internal predecessors, (144), 91 states have call successors, (91), 18 states have call predecessors, (91), 18 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2024-09-11 19:57:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 325 transitions. [2024-09-11 19:57:40,731 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 325 transitions. Word has length 119 [2024-09-11 19:57:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:40,732 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 325 transitions. [2024-09-11 19:57:40,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-11 19:57:40,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 325 transitions. [2024-09-11 19:57:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-09-11 19:57:40,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:40,733 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:57:40,756 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-11 19:57:40,933 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 [2024-09-11 19:57:40,934 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:40,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2126175913, now seen corresponding path program 4 times [2024-09-11 19:57:40,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:40,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347993390] [2024-09-11 19:57:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:40,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051499820] [2024-09-11 19:57:40,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:57:40,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:40,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:40,956 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) [2024-09-11 19:57:40,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 19:57:41,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:57:41,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:41,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 19:57:41,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 57 proven. 47 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-11 19:57:42,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:43,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:43,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347993390] [2024-09-11 19:57:43,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:43,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051499820] [2024-09-11 19:57:43,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051499820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:57:43,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:57:43,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-11 19:57:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472996526] [2024-09-11 19:57:43,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:43,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:57:43,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:57:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:57:43,589 INFO L87 Difference]: Start difference. First operand 235 states and 325 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 19:57:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:44,504 INFO L93 Difference]: Finished difference Result 277 states and 377 transitions. [2024-09-11 19:57:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:57:44,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 122 [2024-09-11 19:57:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:44,507 INFO L225 Difference]: With dead ends: 277 [2024-09-11 19:57:44,507 INFO L226 Difference]: Without dead ends: 275 [2024-09-11 19:57:44,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-09-11 19:57:44,508 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 24 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:44,508 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 467 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:57:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-09-11 19:57:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2024-09-11 19:57:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 146 states have (on average 1.143835616438356) internal successors, (167), 148 states have internal predecessors, (167), 103 states have call successors, (103), 22 states have call predecessors, (103), 22 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2024-09-11 19:57:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 372 transitions. [2024-09-11 19:57:44,694 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 372 transitions. Word has length 122 [2024-09-11 19:57:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:44,695 INFO L474 AbstractCegarLoop]: Abstraction has 272 states and 372 transitions. [2024-09-11 19:57:44,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 19:57:44,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 372 transitions. [2024-09-11 19:57:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-11 19:57:44,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:44,697 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] [2024-09-11 19:57:44,714 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-11 19:57:44,900 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 [2024-09-11 19:57:44,901 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:44,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:44,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1600677333, now seen corresponding path program 2 times [2024-09-11 19:57:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:44,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141389359] [2024-09-11 19:57:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:44,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:44,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707458839] [2024-09-11 19:57:44,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:57:44,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:44,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:44,923 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) [2024-09-11 19:57:44,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 19:57:45,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:57:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:45,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-11 19:57:45,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-11 19:57:45,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-11 19:57:48,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:48,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141389359] [2024-09-11 19:57:48,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707458839] [2024-09-11 19:57:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707458839] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:57:48,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:57:48,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2024-09-11 19:57:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524755034] [2024-09-11 19:57:48,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:48,040 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:57:48,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:57:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:57:48,041 INFO L87 Difference]: Start difference. First operand 272 states and 372 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-09-11 19:57:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:54,187 INFO L93 Difference]: Finished difference Result 363 states and 513 transitions. [2024-09-11 19:57:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-11 19:57:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) Word has length 133 [2024-09-11 19:57:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:54,191 INFO L225 Difference]: With dead ends: 363 [2024-09-11 19:57:54,191 INFO L226 Difference]: Without dead ends: 359 [2024-09-11 19:57:54,192 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2024-09-11 19:57:54,192 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 109 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:54,192 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 659 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-11 19:57:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-09-11 19:57:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 318. [2024-09-11 19:57:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 166 states have (on average 1.1506024096385543) internal successors, (191), 169 states have internal predecessors, (191), 127 states have call successors, (127), 24 states have call predecessors, (127), 24 states have return successors, (126), 124 states have call predecessors, (126), 126 states have call successors, (126) [2024-09-11 19:57:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 444 transitions. [2024-09-11 19:57:54,474 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 444 transitions. Word has length 133 [2024-09-11 19:57:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:54,474 INFO L474 AbstractCegarLoop]: Abstraction has 318 states and 444 transitions. [2024-09-11 19:57:54,474 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-09-11 19:57:54,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 444 transitions. [2024-09-11 19:57:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-09-11 19:57:54,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:54,476 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:57:54,495 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-11 19:57:54,676 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 [2024-09-11 19:57:54,677 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:54,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash -181771727, now seen corresponding path program 5 times [2024-09-11 19:57:54,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:54,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758554550] [2024-09-11 19:57:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:54,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:54,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038627087] [2024-09-11 19:57:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:57:54,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:54,710 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) [2024-09-11 19:57:54,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-11 19:57:54,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-11 19:57:54,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:54,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 19:57:54,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-11 19:57:55,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-11 19:57:56,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:56,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758554550] [2024-09-11 19:57:56,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:56,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038627087] [2024-09-11 19:57:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038627087] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:57:56,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:57:56,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2024-09-11 19:57:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770251287] [2024-09-11 19:57:56,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:56,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:57:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:57:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:57:56,507 INFO L87 Difference]: Start difference. First operand 318 states and 444 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 13 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 13 states have call predecessors, (44), 13 states have call successors, (44) [2024-09-11 19:58:01,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:58:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:58:03,685 INFO L93 Difference]: Finished difference Result 446 states and 648 transitions. [2024-09-11 19:58:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 19:58:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 13 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 13 states have call predecessors, (44), 13 states have call successors, (44) Word has length 141 [2024-09-11 19:58:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:58:03,688 INFO L225 Difference]: With dead ends: 446 [2024-09-11 19:58:03,688 INFO L226 Difference]: Without dead ends: 444 [2024-09-11 19:58:03,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2024-09-11 19:58:03,689 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 62 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:58:03,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 967 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-09-11 19:58:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-09-11 19:58:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 398. [2024-09-11 19:58:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 203 states have (on average 1.1724137931034482) internal successors, (238), 207 states have internal predecessors, (238), 167 states have call successors, (167), 27 states have call predecessors, (167), 27 states have return successors, (166), 163 states have call predecessors, (166), 166 states have call successors, (166) [2024-09-11 19:58:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 571 transitions. [2024-09-11 19:58:04,127 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 571 transitions. Word has length 141 [2024-09-11 19:58:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:58:04,128 INFO L474 AbstractCegarLoop]: Abstraction has 398 states and 571 transitions. [2024-09-11 19:58:04,128 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 13 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 13 states have call predecessors, (44), 13 states have call successors, (44) [2024-09-11 19:58:04,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 571 transitions. [2024-09-11 19:58:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-09-11 19:58:04,130 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:58:04,130 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:58:04,137 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-11 19:58:04,330 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 [2024-09-11 19:58:04,331 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:58:04,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash -412950698, now seen corresponding path program 6 times [2024-09-11 19:58:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:58:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248387495] [2024-09-11 19:58:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:58:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:58:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:58:04,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087458304] [2024-09-11 19:58:04,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:58:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:58:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:58:04,357 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) [2024-09-11 19:58:04,362 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-11 19:58:04,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:58:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:58:04,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-11 19:58:04,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:58:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 91 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-09-11 19:58:05,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:58:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 146 proven. 37 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2024-09-11 19:58:06,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:58:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248387495] [2024-09-11 19:58:06,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:58:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087458304] [2024-09-11 19:58:06,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087458304] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:58:06,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:58:06,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 26 [2024-09-11 19:58:06,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304015231] [2024-09-11 19:58:06,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:58:06,843 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 19:58:06,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:58:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 19:58:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:58:06,844 INFO L87 Difference]: Start difference. First operand 398 states and 571 transitions. Second operand has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 13 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 11 states have call successors, (40) [2024-09-11 19:58:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:58:09,755 INFO L93 Difference]: Finished difference Result 469 states and 672 transitions. [2024-09-11 19:58:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-11 19:58:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 13 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 11 states have call successors, (40) Word has length 144 [2024-09-11 19:58:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:58:09,758 INFO L225 Difference]: With dead ends: 469 [2024-09-11 19:58:09,758 INFO L226 Difference]: Without dead ends: 467 [2024-09-11 19:58:09,759 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2024-09-11 19:58:09,760 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 45 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:58:09,760 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 717 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-11 19:58:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2024-09-11 19:58:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 460. [2024-09-11 19:58:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 233 states have (on average 1.1759656652360515) internal successors, (274), 236 states have internal predecessors, (274), 195 states have call successors, (195), 31 states have call predecessors, (195), 31 states have return successors, (194), 192 states have call predecessors, (194), 194 states have call successors, (194) [2024-09-11 19:58:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 663 transitions. [2024-09-11 19:58:10,326 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 663 transitions. Word has length 144 [2024-09-11 19:58:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:58:10,327 INFO L474 AbstractCegarLoop]: Abstraction has 460 states and 663 transitions. [2024-09-11 19:58:10,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 13 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 11 states have call successors, (40) [2024-09-11 19:58:10,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 663 transitions. [2024-09-11 19:58:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-09-11 19:58:10,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:58:10,328 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] [2024-09-11 19:58:10,334 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-11 19:58:10,528 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 [2024-09-11 19:58:10,529 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:58:10,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash 891540329, now seen corresponding path program 7 times [2024-09-11 19:58:10,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:58:10,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626162344] [2024-09-11 19:58:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:58:10,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:58:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:58:10,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526510516] [2024-09-11 19:58:10,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:58:10,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:58:10,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:58:10,552 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) [2024-09-11 19:58:10,554 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-11 19:58:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:58:10,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-11 19:58:10,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:58:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 97 proven. 73 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2024-09-11 19:58:12,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:58:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:58:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626162344] [2024-09-11 19:58:13,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:58:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526510516] [2024-09-11 19:58:13,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526510516] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:58:13,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:58:13,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-11 19:58:13,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741936651] [2024-09-11 19:58:13,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:58:13,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:58:13,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:58:13,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:58:13,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:58:13,198 INFO L87 Difference]: Start difference. First operand 460 states and 663 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-11 19:58:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:58:15,391 INFO L93 Difference]: Finished difference Result 478 states and 678 transitions. [2024-09-11 19:58:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:58:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2024-09-11 19:58:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:58:15,394 INFO L225 Difference]: With dead ends: 478 [2024-09-11 19:58:15,394 INFO L226 Difference]: Without dead ends: 476 [2024-09-11 19:58:15,395 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:58:15,395 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:58:15,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 575 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-11 19:58:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-09-11 19:58:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 472. [2024-09-11 19:58:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 242 states have (on average 1.1694214876033058) internal successors, (283), 245 states have internal predecessors, (283), 195 states have call successors, (195), 34 states have call predecessors, (195), 34 states have return successors, (194), 192 states have call predecessors, (194), 194 states have call successors, (194) [2024-09-11 19:58:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 672 transitions. [2024-09-11 19:58:15,922 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 672 transitions. Word has length 149 [2024-09-11 19:58:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:58:15,922 INFO L474 AbstractCegarLoop]: Abstraction has 472 states and 672 transitions. [2024-09-11 19:58:15,922 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-11 19:58:15,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 672 transitions. [2024-09-11 19:58:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-09-11 19:58:15,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:58:15,925 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] [2024-09-11 19:58:15,940 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-11 19:58:16,125 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 [2024-09-11 19:58:16,125 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:58:16,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2122073176, now seen corresponding path program 8 times [2024-09-11 19:58:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:58:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122558252] [2024-09-11 19:58:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:58:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:58:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:58:16,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579533960] [2024-09-11 19:58:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:58:16,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:58:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:58:16,157 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) [2024-09-11 19:58:16,159 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-11 19:58:16,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:58:16,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:58:16,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-11 19:58:16,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:58:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 225 proven. 168 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2024-09-11 19:58:19,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:58:19,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:58:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122558252] [2024-09-11 19:58:19,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:58:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579533960] [2024-09-11 19:58:19,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579533960] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:58:19,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:58:19,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-11 19:58:19,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246027206] [2024-09-11 19:58:19,447 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:58:19,447 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 19:58:19,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:58:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 19:58:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:58:19,448 INFO L87 Difference]: Start difference. First operand 472 states and 672 transitions. Second operand has 25 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) [2024-09-11 19:58:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:58:22,570 INFO L93 Difference]: Finished difference Result 541 states and 760 transitions. [2024-09-11 19:58:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 19:58:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) Word has length 171 [2024-09-11 19:58:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:58:22,575 INFO L225 Difference]: With dead ends: 541 [2024-09-11 19:58:22,575 INFO L226 Difference]: Without dead ends: 539 [2024-09-11 19:58:22,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:58:22,577 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 60 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:58:22,577 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 630 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-11 19:58:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-09-11 19:58:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 529. [2024-09-11 19:58:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 273 states have (on average 1.1684981684981686) internal successors, (319), 276 states have internal predecessors, (319), 215 states have call successors, (215), 40 states have call predecessors, (215), 40 states have return successors, (214), 212 states have call predecessors, (214), 214 states have call successors, (214) [2024-09-11 19:58:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 748 transitions. [2024-09-11 19:58:23,328 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 748 transitions. Word has length 171 [2024-09-11 19:58:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:58:23,329 INFO L474 AbstractCegarLoop]: Abstraction has 529 states and 748 transitions. [2024-09-11 19:58:23,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) [2024-09-11 19:58:23,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 748 transitions. [2024-09-11 19:58:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-09-11 19:58:23,332 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:58:23,332 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] [2024-09-11 19:58:23,345 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-11 19:58:23,532 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 [2024-09-11 19:58:23,532 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:58:23,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:58:23,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1019680267, now seen corresponding path program 3 times [2024-09-11 19:58:23,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:58:23,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819290063] [2024-09-11 19:58:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:58:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:58:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:58:23,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276325931] [2024-09-11 19:58:23,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:58:23,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:58:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:58:23,576 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) [2024-09-11 19:58:23,578 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-11 19:58:23,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:58:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:58:23,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-11 19:58:23,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:58:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 175 proven. 84 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-11 19:58:39,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:58:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:58:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819290063] [2024-09-11 19:58:41,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:58:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276325931] [2024-09-11 19:58:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276325931] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:58:41,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:58:41,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-11 19:58:41,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11607416] [2024-09-11 19:58:41,860 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:58:41,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:58:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:58:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:58:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=400, Unknown=1, NotChecked=0, Total=462 [2024-09-11 19:58:41,861 INFO L87 Difference]: Start difference. First operand 529 states and 748 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22)