./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 18:32:12,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:32:12,090 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:32:12,097 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:32:12,099 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:32:12,127 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:32:12,128 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:32:12,128 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:32:12,129 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:32:12,132 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:32:12,133 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:32:12,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:32:12,133 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:32:12,134 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:32:12,134 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:32:12,134 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:32:12,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:32:12,135 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:32:12,135 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:32:12,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:32:12,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:32:12,138 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:32:12,138 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:32:12,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:32:12,139 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:32:12,139 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:32:12,139 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:32:12,140 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:32:12,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:32:12,140 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:32:12,141 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:32:12,141 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:32:12,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:32:12,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:32:12,142 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:32:12,142 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:32:12,142 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:32:12,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:32:12,143 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:32:12,143 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:32:12,143 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:32:12,144 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:32:12,144 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:32:12,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:32:12,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:32:12,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:32:12,451 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:32:12,451 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:32:12,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-17 18:32:13,865 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:32:14,073 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:32:14,074 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-17 18:32:14,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5e2232e4c/314b635623694b38a4e27b4f90165707/FLAGf604ede86 [2024-09-17 18:32:14,096 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5e2232e4c/314b635623694b38a4e27b4f90165707 [2024-09-17 18:32:14,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:32:14,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:32:14,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:32:14,101 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:32:14,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:32:14,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,109 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635aba71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14, skipping insertion in model container [2024-09-17 18:32:14,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,129 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:32:14,286 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-09-17 18:32:14,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:32:14,362 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:32:14,372 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-09-17 18:32:14,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:32:14,421 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:32:14,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14 WrapperNode [2024-09-17 18:32:14,425 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:32:14,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:32:14,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:32:14,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:32:14,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,444 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:32:14,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:32:14,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:32:14,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:32:14,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:32:14,456 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,458 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,468 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]. [2024-09-17 18:32:14,468 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,468 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:32:14,478 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:32:14,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:32:14,478 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:32:14,481 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (1/1) ... [2024-09-17 18:32:14,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:32:14,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:14,514 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) [2024-09-17 18:32:14,520 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 [2024-09-17 18:32:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:32:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 18:32:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 18:32:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:32:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:32:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:32:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:32:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:32:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:32:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:32:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:32:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:32:14,633 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:32:14,635 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:32:14,822 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-17 18:32:14,823 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:32:14,847 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:32:14,847 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 18:32:14,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:32:14 BoogieIcfgContainer [2024-09-17 18:32:14,847 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:32:14,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:32:14,850 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:32:14,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:32:14,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:32:14" (1/3) ... [2024-09-17 18:32:14,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59dfd434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:32:14, skipping insertion in model container [2024-09-17 18:32:14,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:32:14" (2/3) ... [2024-09-17 18:32:14,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59dfd434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:32:14, skipping insertion in model container [2024-09-17 18:32:14,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:32:14" (3/3) ... [2024-09-17 18:32:14,856 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-09-17 18:32:14,869 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:32:14,870 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:32:14,929 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:32:14,940 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;@6da3ffcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:32:14,942 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:32:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:32:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 18:32:14,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:14,956 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:14,956 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:14,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1130788706, now seen corresponding path program 1 times [2024-09-17 18:32:14,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:14,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76924125] [2024-09-17 18:32:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:32:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:32:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:32:15,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76924125] [2024-09-17 18:32:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76924125] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:15,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:15,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 18:32:15,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69511170] [2024-09-17 18:32:15,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:15,166 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 18:32:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 18:32:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:32:15,192 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:32:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:15,221 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2024-09-17 18:32:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 18:32:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-17 18:32:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:15,230 INFO L225 Difference]: With dead ends: 64 [2024-09-17 18:32:15,231 INFO L226 Difference]: Without dead ends: 31 [2024-09-17 18:32:15,234 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:32:15,237 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:15,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-17 18:32:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-17 18:32:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:32:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-09-17 18:32:15,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 31 [2024-09-17 18:32:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:15,278 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-09-17 18:32:15,278 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:32:15,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-09-17 18:32:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 18:32:15,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:15,281 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:15,281 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:32:15,282 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:15,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1704590499, now seen corresponding path program 1 times [2024-09-17 18:32:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:15,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234187440] [2024-09-17 18:32:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:15,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:32:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:32:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:32:15,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:15,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234187440] [2024-09-17 18:32:15,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234187440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:15,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687443150] [2024-09-17 18:32:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:15,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:15,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:15,585 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) [2024-09-17 18:32:15,586 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:32:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:15,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:32:15,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:32:15,864 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687443150] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:15,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:15,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-09-17 18:32:15,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261816407] [2024-09-17 18:32:15,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:15,869 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:32:15,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:15,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:32:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:32:15,872 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:32:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:15,987 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2024-09-17 18:32:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:32:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-17 18:32:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:15,992 INFO L225 Difference]: With dead ends: 48 [2024-09-17 18:32:15,992 INFO L226 Difference]: Without dead ends: 46 [2024-09-17 18:32:15,993 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:32:15,994 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:15,994 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:15,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-17 18:32:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-09-17 18:32:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:32:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2024-09-17 18:32:16,012 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 32 [2024-09-17 18:32:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:16,013 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2024-09-17 18:32:16,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:32:16,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2024-09-17 18:32:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-17 18:32:16,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:16,014 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:16,032 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 18:32:16,218 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 [2024-09-17 18:32:16,219 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:16,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1312615442, now seen corresponding path program 1 times [2024-09-17 18:32:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:16,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203503220] [2024-09-17 18:32:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:16,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166212731] [2024-09-17 18:32:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:16,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:16,243 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) [2024-09-17 18:32:16,257 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:32:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:32:16,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:32:16,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:16,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:16,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203503220] [2024-09-17 18:32:16,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:16,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166212731] [2024-09-17 18:32:16,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166212731] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:16,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:16,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:16,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327664070] [2024-09-17 18:32:16,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:16,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:16,417 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-17 18:32:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:16,483 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-09-17 18:32:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-17 18:32:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:16,487 INFO L225 Difference]: With dead ends: 63 [2024-09-17 18:32:16,487 INFO L226 Difference]: Without dead ends: 61 [2024-09-17 18:32:16,488 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:16,489 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:16,489 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-17 18:32:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-09-17 18:32:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-17 18:32:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2024-09-17 18:32:16,504 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 33 [2024-09-17 18:32:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:16,505 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2024-09-17 18:32:16,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-17 18:32:16,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2024-09-17 18:32:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-17 18:32:16,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:16,507 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:16,524 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:32:16,711 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 [2024-09-17 18:32:16,712 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:16,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1674155548, now seen corresponding path program 1 times [2024-09-17 18:32:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16509846] [2024-09-17 18:32:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:32:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:32:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:32:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:32:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16509846] [2024-09-17 18:32:16,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16509846] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:16,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924540428] [2024-09-17 18:32:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:16,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:16,881 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) [2024-09-17 18:32:16,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:32:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:16,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:32:16,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:32:17,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:17,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924540428] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:17,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:17,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-17 18:32:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930152212] [2024-09-17 18:32:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:17,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:17,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:32:17,020 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:32:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:17,102 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-09-17 18:32:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-17 18:32:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:17,104 INFO L225 Difference]: With dead ends: 60 [2024-09-17 18:32:17,104 INFO L226 Difference]: Without dead ends: 56 [2024-09-17 18:32:17,104 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:32:17,105 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:17,106 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-17 18:32:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-17 18:32:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:32:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-17 18:32:17,119 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2024-09-17 18:32:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:17,119 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-17 18:32:17,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:32:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-17 18:32:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:32:17,121 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:17,121 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:17,142 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:32:17,322 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 [2024-09-17 18:32:17,322 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:17,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1754125331, now seen corresponding path program 1 times [2024-09-17 18:32:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:17,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848918532] [2024-09-17 18:32:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:17,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153302107] [2024-09-17 18:32:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:17,346 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) [2024-09-17 18:32:17,348 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:32:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:17,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:32:17,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:32:17,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:32:17,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848918532] [2024-09-17 18:32:17,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153302107] [2024-09-17 18:32:17,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153302107] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:17,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:17,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935462501] [2024-09-17 18:32:17,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:17,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:17,595 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:32:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:17,671 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-09-17 18:32:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:32:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-09-17 18:32:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:17,673 INFO L225 Difference]: With dead ends: 62 [2024-09-17 18:32:17,675 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 18:32:17,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:32:17,676 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:17,676 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 18:32:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-17 18:32:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:32:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-09-17 18:32:17,700 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 48 [2024-09-17 18:32:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:17,700 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-09-17 18:32:17,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:32:17,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-09-17 18:32:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-17 18:32:17,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:17,702 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:17,723 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 18:32:17,902 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 [2024-09-17 18:32:17,903 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:17,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:17,903 INFO L85 PathProgramCache]: Analyzing trace with hash -914162351, now seen corresponding path program 1 times [2024-09-17 18:32:17,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:17,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49744669] [2024-09-17 18:32:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:17,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360193550] [2024-09-17 18:32:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:17,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:17,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:17,937 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) [2024-09-17 18:32:17,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:32:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-17 18:32:18,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-17 18:32:18,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-17 18:32:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49744669] [2024-09-17 18:32:18,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360193550] [2024-09-17 18:32:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360193550] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:18,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:18,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-17 18:32:18,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044285046] [2024-09-17 18:32:18,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:18,214 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:32:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:32:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:32:18,215 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-17 18:32:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:18,352 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-09-17 18:32:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:32:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-09-17 18:32:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:18,354 INFO L225 Difference]: With dead ends: 87 [2024-09-17 18:32:18,354 INFO L226 Difference]: Without dead ends: 85 [2024-09-17 18:32:18,355 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:32:18,355 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:18,356 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 203 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-17 18:32:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2024-09-17 18:32:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:32:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-09-17 18:32:18,382 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 55 [2024-09-17 18:32:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:18,382 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-09-17 18:32:18,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-17 18:32:18,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-09-17 18:32:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-17 18:32:18,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:18,384 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:18,403 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:32:18,584 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 [2024-09-17 18:32:18,584 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:18,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash -268943045, now seen corresponding path program 1 times [2024-09-17 18:32:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:18,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098581974] [2024-09-17 18:32:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:32:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:32:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:32:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:32:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:32:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:32:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-17 18:32:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098581974] [2024-09-17 18:32:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098581974] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585411469] [2024-09-17 18:32:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:18,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:18,750 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) [2024-09-17 18:32:18,752 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:32:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:18,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:32:18,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-17 18:32:18,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-17 18:32:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585411469] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:18,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:32:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-17 18:32:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589373035] [2024-09-17 18:32:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:18,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:32:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:32:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:32:18,973 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-17 18:32:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:19,169 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-09-17 18:32:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:32:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 57 [2024-09-17 18:32:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:19,171 INFO L225 Difference]: With dead ends: 102 [2024-09-17 18:32:19,171 INFO L226 Difference]: Without dead ends: 94 [2024-09-17 18:32:19,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:32:19,174 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:19,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:32:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-17 18:32:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-09-17 18:32:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:32:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-09-17 18:32:19,210 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 57 [2024-09-17 18:32:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:19,211 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-09-17 18:32:19,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-17 18:32:19,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-09-17 18:32:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-17 18:32:19,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:19,215 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:19,233 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:32:19,415 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 [2024-09-17 18:32:19,416 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:19,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2145912741, now seen corresponding path program 1 times [2024-09-17 18:32:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570658142] [2024-09-17 18:32:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108315781] [2024-09-17 18:32:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:19,439 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) [2024-09-17 18:32:19,442 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:32:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:19,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-17 18:32:19,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-17 18:32:19,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-17 18:32:20,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570658142] [2024-09-17 18:32:20,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108315781] [2024-09-17 18:32:20,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108315781] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:20,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:20,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-17 18:32:20,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747045419] [2024-09-17 18:32:20,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:20,066 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:32:20,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:20,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:32:20,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:32:20,068 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-17 18:32:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:21,130 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-17 18:32:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:32:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-09-17 18:32:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:21,133 INFO L225 Difference]: With dead ends: 136 [2024-09-17 18:32:21,133 INFO L226 Difference]: Without dead ends: 133 [2024-09-17 18:32:21,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:32:21,134 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:21,134 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:32:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-17 18:32:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-09-17 18:32:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 49 states have call successors, (49), 9 states have call predecessors, (49), 8 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-17 18:32:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2024-09-17 18:32:21,183 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 63 [2024-09-17 18:32:21,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:21,184 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2024-09-17 18:32:21,184 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-17 18:32:21,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:21,184 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2024-09-17 18:32:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-17 18:32:21,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:21,185 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:21,201 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:21,389 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 [2024-09-17 18:32:21,390 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:21,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009882, now seen corresponding path program 2 times [2024-09-17 18:32:21,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118776659] [2024-09-17 18:32:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540460149] [2024-09-17 18:32:21,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:32:21,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:21,411 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) [2024-09-17 18:32:21,412 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:32:21,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:32:21,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:32:21,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:32:21,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-17 18:32:21,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:32:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118776659] [2024-09-17 18:32:22,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540460149] [2024-09-17 18:32:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540460149] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:22,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:22,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-17 18:32:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891581988] [2024-09-17 18:32:22,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:22,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:32:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:32:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:32:22,096 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-17 18:32:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:23,392 INFO L93 Difference]: Finished difference Result 243 states and 366 transitions. [2024-09-17 18:32:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:32:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 68 [2024-09-17 18:32:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:23,399 INFO L225 Difference]: With dead ends: 243 [2024-09-17 18:32:23,400 INFO L226 Difference]: Without dead ends: 241 [2024-09-17 18:32:23,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:32:23,402 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:23,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 287 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:32:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-17 18:32:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2024-09-17 18:32:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 112 states have internal predecessors, (137), 85 states have call successors, (85), 11 states have call predecessors, (85), 10 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2024-09-17 18:32:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 304 transitions. [2024-09-17 18:32:23,496 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 304 transitions. Word has length 68 [2024-09-17 18:32:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:23,497 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 304 transitions. [2024-09-17 18:32:23,497 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-17 18:32:23,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:23,497 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 304 transitions. [2024-09-17 18:32:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 18:32:23,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:23,498 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:23,516 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:23,702 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 [2024-09-17 18:32:23,703 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:23,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1448853371, now seen corresponding path program 3 times [2024-09-17 18:32:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129099697] [2024-09-17 18:32:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:23,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800712546] [2024-09-17 18:32:23,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:32:23,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:23,720 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) [2024-09-17 18:32:23,722 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:32:23,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:32:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:32:23,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-17 18:32:23,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-17 18:32:25,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:39,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129099697] [2024-09-17 18:32:39,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800712546] [2024-09-17 18:32:39,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800712546] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:39,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:39,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-17 18:32:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273554494] [2024-09-17 18:32:39,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:39,614 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:32:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:32:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:32:39,615 INFO L87 Difference]: Start difference. First operand 206 states and 304 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-17 18:32:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:41,487 INFO L93 Difference]: Finished difference Result 227 states and 327 transitions. [2024-09-17 18:32:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:32:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2024-09-17 18:32:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:41,489 INFO L225 Difference]: With dead ends: 227 [2024-09-17 18:32:41,490 INFO L226 Difference]: Without dead ends: 225 [2024-09-17 18:32:41,490 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:32:41,491 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:41,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:32:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-17 18:32:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2024-09-17 18:32:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 89 states have call successors, (89), 14 states have call predecessors, (89), 13 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-17 18:32:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 324 transitions. [2024-09-17 18:32:41,583 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 324 transitions. Word has length 73 [2024-09-17 18:32:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:41,583 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 324 transitions. [2024-09-17 18:32:41,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-17 18:32:41,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 324 transitions. [2024-09-17 18:32:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-17 18:32:41,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:41,585 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:41,603 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:41,789 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 [2024-09-17 18:32:41,790 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:41,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:41,790 INFO L85 PathProgramCache]: Analyzing trace with hash 910050682, now seen corresponding path program 1 times [2024-09-17 18:32:41,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:41,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665556731] [2024-09-17 18:32:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:41,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:41,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079335744] [2024-09-17 18:32:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:41,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:41,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:41,817 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) [2024-09-17 18:32:41,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:32:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:41,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-17 18:32:41,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-17 18:32:42,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-17 18:32:43,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665556731] [2024-09-17 18:32:43,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079335744] [2024-09-17 18:32:43,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079335744] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:43,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:43,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-17 18:32:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009645344] [2024-09-17 18:32:43,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:43,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:32:43,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:32:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:32:43,118 INFO L87 Difference]: Start difference. First operand 224 states and 324 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-17 18:32:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:45,913 INFO L93 Difference]: Finished difference Result 353 states and 532 transitions. [2024-09-17 18:32:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:32:45,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 79 [2024-09-17 18:32:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:45,920 INFO L225 Difference]: With dead ends: 353 [2024-09-17 18:32:45,920 INFO L226 Difference]: Without dead ends: 349 [2024-09-17 18:32:45,921 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:32:45,922 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:45,922 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 609 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-17 18:32:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-17 18:32:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2024-09-17 18:32:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 181 states have internal predecessors, (225), 150 states have call successors, (150), 17 states have call predecessors, (150), 16 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-17 18:32:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2024-09-17 18:32:46,089 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 79 [2024-09-17 18:32:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:46,089 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2024-09-17 18:32:46,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-17 18:32:46,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2024-09-17 18:32:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-17 18:32:46,091 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:46,091 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:46,105 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:46,294 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 [2024-09-17 18:32:46,294 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:46,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:46,295 INFO L85 PathProgramCache]: Analyzing trace with hash 623896260, now seen corresponding path program 1 times [2024-09-17 18:32:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:46,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822785554] [2024-09-17 18:32:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:46,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70508589] [2024-09-17 18:32:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:46,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:46,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:46,317 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) [2024-09-17 18:32:46,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 18:32:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:46,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-17 18:32:46,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-17 18:32:47,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:49,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:49,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822785554] [2024-09-17 18:32:49,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:49,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70508589] [2024-09-17 18:32:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70508589] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:49,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-17 18:32:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203482201] [2024-09-17 18:32:49,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:49,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:32:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:32:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:32:49,155 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-17 18:32:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:50,300 INFO L93 Difference]: Finished difference Result 358 states and 533 transitions. [2024-09-17 18:32:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:32:50,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 95 [2024-09-17 18:32:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:50,304 INFO L225 Difference]: With dead ends: 358 [2024-09-17 18:32:50,306 INFO L226 Difference]: Without dead ends: 356 [2024-09-17 18:32:50,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:32:50,307 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:50,307 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 369 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-17 18:32:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-09-17 18:32:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2024-09-17 18:32:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 184 states have (on average 1.2554347826086956) internal successors, (231), 187 states have internal predecessors, (231), 150 states have call successors, (150), 19 states have call predecessors, (150), 18 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-17 18:32:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 528 transitions. [2024-09-17 18:32:50,452 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 528 transitions. Word has length 95 [2024-09-17 18:32:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:50,453 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 528 transitions. [2024-09-17 18:32:50,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-17 18:32:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 528 transitions. [2024-09-17 18:32:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-17 18:32:50,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:50,455 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:50,473 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-17 18:32:50,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:50,660 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:50,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash 658114285, now seen corresponding path program 4 times [2024-09-17 18:32:50,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:50,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590584234] [2024-09-17 18:32:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:50,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:32:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:32:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:32:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:32:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:32:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:32:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:32:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:32:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:32:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:32:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:32:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-17 18:32:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:32:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-17 18:32:50,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:50,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590584234] [2024-09-17 18:32:50,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590584234] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:32:50,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:32:50,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:32:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277557587] [2024-09-17 18:32:50,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:32:50,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:32:50,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:50,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:32:50,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:32:50,767 INFO L87 Difference]: Start difference. First operand 353 states and 528 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 18:32:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:50,911 INFO L93 Difference]: Finished difference Result 426 states and 629 transitions. [2024-09-17 18:32:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:32:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2024-09-17 18:32:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:50,914 INFO L225 Difference]: With dead ends: 426 [2024-09-17 18:32:50,914 INFO L226 Difference]: Without dead ends: 230 [2024-09-17 18:32:50,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:32:50,917 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:50,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:32:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-17 18:32:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2024-09-17 18:32:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 78 states have call successors, (78), 19 states have call predecessors, (78), 18 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-17 18:32:50,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 279 transitions. [2024-09-17 18:32:50,989 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 279 transitions. Word has length 98 [2024-09-17 18:32:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:50,990 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 279 transitions. [2024-09-17 18:32:50,990 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 18:32:50,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 279 transitions. [2024-09-17 18:32:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-17 18:32:50,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:50,991 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:50,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-17 18:32:50,992 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:50,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:50,992 INFO L85 PathProgramCache]: Analyzing trace with hash -825105347, now seen corresponding path program 1 times [2024-09-17 18:32:50,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:50,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681589242] [2024-09-17 18:32:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:32:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:32:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:32:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:32:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:32:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:32:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:32:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:32:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:32:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:32:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:32:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:32:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:32:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-17 18:32:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:32:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:32:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-17 18:32:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-17 18:32:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-17 18:32:51,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:51,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681589242] [2024-09-17 18:32:51,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681589242] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:51,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917823620] [2024-09-17 18:32:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:51,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:51,178 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) [2024-09-17 18:32:51,187 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 18:32:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:32:51,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:32:51,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-09-17 18:32:51,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-17 18:32:51,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917823620] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:51,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:32:51,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-17 18:32:51,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603059461] [2024-09-17 18:32:51,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:51,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:32:51,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:32:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:32:51,368 INFO L87 Difference]: Start difference. First operand 206 states and 279 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-17 18:32:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:51,663 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2024-09-17 18:32:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 18:32:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 109 [2024-09-17 18:32:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:51,665 INFO L225 Difference]: With dead ends: 232 [2024-09-17 18:32:51,665 INFO L226 Difference]: Without dead ends: 220 [2024-09-17 18:32:51,666 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:32:51,666 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 17 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:51,667 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 307 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:32:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-17 18:32:51,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2024-09-17 18:32:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 106 states have (on average 1.150943396226415) internal successors, (122), 108 states have internal predecessors, (122), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-09-17 18:32:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2024-09-17 18:32:51,747 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 109 [2024-09-17 18:32:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:51,747 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2024-09-17 18:32:51,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-17 18:32:51,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2024-09-17 18:32:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-17 18:32:51,749 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:51,749 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:51,765 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:51,950 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 [2024-09-17 18:32:51,950 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:51,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:51,951 INFO L85 PathProgramCache]: Analyzing trace with hash 429591308, now seen corresponding path program 2 times [2024-09-17 18:32:51,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:51,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149170605] [2024-09-17 18:32:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:51,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:51,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863098324] [2024-09-17 18:32:51,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:32:51,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:51,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:51,981 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) [2024-09-17 18:32:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 18:32:52,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:32:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:32:52,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-17 18:32:52,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-09-17 18:32:52,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149170605] [2024-09-17 18:32:52,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:52,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863098324] [2024-09-17 18:32:52,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863098324] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:52,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-17 18:32:52,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33118938] [2024-09-17 18:32:52,826 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:52,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:32:52,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:32:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:32:52,827 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-17 18:32:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:53,586 INFO L93 Difference]: Finished difference Result 231 states and 316 transitions. [2024-09-17 18:32:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:32:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2024-09-17 18:32:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:53,589 INFO L225 Difference]: With dead ends: 231 [2024-09-17 18:32:53,589 INFO L226 Difference]: Without dead ends: 229 [2024-09-17 18:32:53,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:32:53,590 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:53,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 428 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:32:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-17 18:32:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2024-09-17 18:32:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-17 18:32:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2024-09-17 18:32:53,705 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 110 [2024-09-17 18:32:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:53,707 INFO L474 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2024-09-17 18:32:53,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-17 18:32:53,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2024-09-17 18:32:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-17 18:32:53,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:53,709 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:53,727 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:53,910 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 [2024-09-17 18:32:53,910 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:53,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:53,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1625892333, now seen corresponding path program 3 times [2024-09-17 18:32:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:53,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124795730] [2024-09-17 18:32:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:53,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:53,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726499657] [2024-09-17 18:32:53,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:32:53,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:53,934 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) [2024-09-17 18:32:53,937 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 18:32:54,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:32:54,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:32:54,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-17 18:32:54,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-09-17 18:32:54,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-09-17 18:32:55,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124795730] [2024-09-17 18:32:55,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726499657] [2024-09-17 18:32:55,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726499657] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:32:55,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:32:55,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-09-17 18:32:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016875950] [2024-09-17 18:32:55,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:55,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 18:32:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 18:32:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:32:55,709 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-17 18:32:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:32:58,231 INFO L93 Difference]: Finished difference Result 267 states and 364 transitions. [2024-09-17 18:32:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:32:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2024-09-17 18:32:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:32:58,234 INFO L225 Difference]: With dead ends: 267 [2024-09-17 18:32:58,234 INFO L226 Difference]: Without dead ends: 265 [2024-09-17 18:32:58,234 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 18:32:58,235 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:32:58,235 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 482 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-17 18:32:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-17 18:32:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2024-09-17 18:32:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 101 states have call successors, (101), 22 states have call predecessors, (101), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-17 18:32:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 359 transitions. [2024-09-17 18:32:58,391 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 359 transitions. Word has length 115 [2024-09-17 18:32:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:32:58,391 INFO L474 AbstractCegarLoop]: Abstraction has 262 states and 359 transitions. [2024-09-17 18:32:58,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-17 18:32:58,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 359 transitions. [2024-09-17 18:32:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-17 18:32:58,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:32:58,393 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:32:58,410 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-17 18:32:58,596 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 [2024-09-17 18:32:58,597 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:32:58,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:32:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash 34587587, now seen corresponding path program 4 times [2024-09-17 18:32:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:32:58,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850922506] [2024-09-17 18:32:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:32:58,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:32:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:32:58,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840807470] [2024-09-17 18:32:58,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:32:58,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:32:58,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:32:58,624 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) [2024-09-17 18:32:58,625 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 18:32:58,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:32:58,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:32:58,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-17 18:32:58,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:32:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-17 18:32:59,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:32:59,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:32:59,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850922506] [2024-09-17 18:32:59,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:32:59,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840807470] [2024-09-17 18:32:59,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840807470] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:32:59,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:32:59,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-17 18:32:59,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833869320] [2024-09-17 18:32:59,776 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:32:59,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:32:59,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:32:59,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:32:59,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:32:59,777 INFO L87 Difference]: Start difference. First operand 262 states and 359 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-17 18:33:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:00,903 INFO L93 Difference]: Finished difference Result 295 states and 404 transitions. [2024-09-17 18:33:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:33:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2024-09-17 18:33:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:00,906 INFO L225 Difference]: With dead ends: 295 [2024-09-17 18:33:00,911 INFO L226 Difference]: Without dead ends: 293 [2024-09-17 18:33:00,912 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:33:00,912 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:00,912 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 452 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-17 18:33:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-17 18:33:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2024-09-17 18:33:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 146 states have internal predecessors, (164), 104 states have call successors, (104), 22 states have call predecessors, (104), 21 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-17 18:33:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 369 transitions. [2024-09-17 18:33:01,083 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 369 transitions. Word has length 117 [2024-09-17 18:33:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:01,084 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 369 transitions. [2024-09-17 18:33:01,085 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-17 18:33:01,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 369 transitions. [2024-09-17 18:33:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:33:01,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:01,088 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:01,104 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:01,288 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 [2024-09-17 18:33:01,288 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1783402708, now seen corresponding path program 5 times [2024-09-17 18:33:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792486879] [2024-09-17 18:33:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:01,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431293475] [2024-09-17 18:33:01,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:33:01,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:01,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:01,320 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) [2024-09-17 18:33:01,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 18:33:01,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 18:33:01,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:01,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-17 18:33:01,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-17 18:33:02,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:23,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:23,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792486879] [2024-09-17 18:33:23,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:23,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431293475] [2024-09-17 18:33:23,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431293475] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:23,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:33:23,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-17 18:33:23,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032266283] [2024-09-17 18:33:23,197 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:23,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:33:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:33:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=722, Unknown=2, NotChecked=0, Total=870 [2024-09-17 18:33:23,199 INFO L87 Difference]: Start difference. First operand 269 states and 369 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-17 18:33:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:24,111 INFO L93 Difference]: Finished difference Result 285 states and 382 transitions. [2024-09-17 18:33:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:33:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 120 [2024-09-17 18:33:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:24,114 INFO L225 Difference]: With dead ends: 285 [2024-09-17 18:33:24,114 INFO L226 Difference]: Without dead ends: 283 [2024-09-17 18:33:24,115 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=235, Invalid=1095, Unknown=2, NotChecked=0, Total=1332 [2024-09-17 18:33:24,115 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:24,116 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:33:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-17 18:33:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2024-09-17 18:33:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 152 states have (on average 1.138157894736842) internal successors, (173), 155 states have internal predecessors, (173), 104 states have call successors, (104), 25 states have call predecessors, (104), 24 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-17 18:33:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2024-09-17 18:33:24,250 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 120 [2024-09-17 18:33:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:24,251 INFO L474 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2024-09-17 18:33:24,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-17 18:33:24,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2024-09-17 18:33:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-17 18:33:24,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:24,253 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:24,261 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:24,453 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 [2024-09-17 18:33:24,454 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:24,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2078513889, now seen corresponding path program 2 times [2024-09-17 18:33:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:24,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227890024] [2024-09-17 18:33:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:24,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347931049] [2024-09-17 18:33:24,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:33:24,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:24,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:24,475 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) [2024-09-17 18:33:24,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 18:33:24,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:33:24,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:24,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-17 18:33:24,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-17 18:33:25,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-17 18:33:26,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:26,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227890024] [2024-09-17 18:33:26,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:26,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347931049] [2024-09-17 18:33:26,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347931049] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:26,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:26,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-09-17 18:33:26,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602053422] [2024-09-17 18:33:26,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:26,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:33:26,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:33:26,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:33:26,524 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-17 18:33:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:32,131 INFO L93 Difference]: Finished difference Result 414 states and 593 transitions. [2024-09-17 18:33:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-17 18:33:32,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 126 [2024-09-17 18:33:32,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:32,134 INFO L225 Difference]: With dead ends: 414 [2024-09-17 18:33:32,134 INFO L226 Difference]: Without dead ends: 412 [2024-09-17 18:33:32,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=569, Invalid=2401, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:33:32,135 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:32,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 591 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-17 18:33:32,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-09-17 18:33:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 392. [2024-09-17 18:33:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 202 states have (on average 1.183168316831683) internal successors, (239), 205 states have internal predecessors, (239), 162 states have call successors, (162), 28 states have call predecessors, (162), 27 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2024-09-17 18:33:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 560 transitions. [2024-09-17 18:33:32,381 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 560 transitions. Word has length 126 [2024-09-17 18:33:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:32,382 INFO L474 AbstractCegarLoop]: Abstraction has 392 states and 560 transitions. [2024-09-17 18:33:32,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-17 18:33:32,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:32,382 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 560 transitions. [2024-09-17 18:33:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-17 18:33:32,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:32,384 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:32,401 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-17 18:33:32,587 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 [2024-09-17 18:33:32,588 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:32,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash -627102050, now seen corresponding path program 2 times [2024-09-17 18:33:32,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:32,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626504348] [2024-09-17 18:33:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:32,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:32,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450123991] [2024-09-17 18:33:32,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:33:32,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:32,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:32,608 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) [2024-09-17 18:33:32,609 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 18:33:32,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:33:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:32,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-17 18:33:32,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-09-17 18:33:33,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-17 18:33:33,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626504348] [2024-09-17 18:33:33,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450123991] [2024-09-17 18:33:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450123991] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:33:33,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:33:33,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-17 18:33:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782723217] [2024-09-17 18:33:33,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:33,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 18:33:33,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:33,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 18:33:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:33:33,691 INFO L87 Difference]: Start difference. First operand 392 states and 560 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-17 18:33:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:33:36,572 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2024-09-17 18:33:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:33:36,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 131 [2024-09-17 18:33:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:33:36,575 INFO L225 Difference]: With dead ends: 415 [2024-09-17 18:33:36,575 INFO L226 Difference]: Without dead ends: 405 [2024-09-17 18:33:36,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 18:33:36,576 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 67 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:33:36,577 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 695 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-17 18:33:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-17 18:33:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 395. [2024-09-17 18:33:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 206 states have internal predecessors, (238), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-09-17 18:33:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2024-09-17 18:33:36,831 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 131 [2024-09-17 18:33:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:33:36,832 INFO L474 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2024-09-17 18:33:36,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-17 18:33:36,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2024-09-17 18:33:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-17 18:33:36,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:33:36,834 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:33:36,852 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-17 18:33:37,034 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 [2024-09-17 18:33:37,035 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:33:37,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:33:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash 231977005, now seen corresponding path program 6 times [2024-09-17 18:33:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:33:37,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360671725] [2024-09-17 18:33:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:33:37,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:33:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:33:37,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151836928] [2024-09-17 18:33:37,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:33:37,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:33:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:33:37,060 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) [2024-09-17 18:33:37,062 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 18:33:37,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 18:33:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:33:37,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-17 18:33:37,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:33:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-09-17 18:33:39,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:33:52,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:33:52,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360671725] [2024-09-17 18:33:52,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:33:52,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151836928] [2024-09-17 18:33:52,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151836928] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:33:52,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:33:52,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 18:33:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467329509] [2024-09-17 18:33:52,051 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:33:52,052 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:33:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:33:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:33:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2024-09-17 18:33:52,053 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-17 18:34:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:03,450 INFO L93 Difference]: Finished difference Result 440 states and 609 transitions. [2024-09-17 18:34:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:34:03,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 132 [2024-09-17 18:34:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:03,452 INFO L225 Difference]: With dead ends: 440 [2024-09-17 18:34:03,453 INFO L226 Difference]: Without dead ends: 438 [2024-09-17 18:34:03,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=180, Invalid=940, Unknown=2, NotChecked=0, Total=1122 [2024-09-17 18:34:03,453 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:03,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 476 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-17 18:34:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-17 18:34:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2024-09-17 18:34:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 226 states have (on average 1.154867256637168) internal successors, (261), 227 states have internal predecessors, (261), 171 states have call successors, (171), 35 states have call predecessors, (171), 34 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-17 18:34:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 601 transitions. [2024-09-17 18:34:03,732 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 601 transitions. Word has length 132 [2024-09-17 18:34:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:03,732 INFO L474 AbstractCegarLoop]: Abstraction has 432 states and 601 transitions. [2024-09-17 18:34:03,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-17 18:34:03,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 601 transitions. [2024-09-17 18:34:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-17 18:34:03,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:03,734 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:03,742 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-17 18:34:03,935 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 [2024-09-17 18:34:03,935 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash -456505470, now seen corresponding path program 7 times [2024-09-17 18:34:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663059321] [2024-09-17 18:34:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090899187] [2024-09-17 18:34:03,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:34:03,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:03,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:03,955 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) [2024-09-17 18:34:03,956 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-17 18:34:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:34:04,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-17 18:34:04,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 132 proven. 75 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-09-17 18:34:05,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:05,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:05,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663059321] [2024-09-17 18:34:05,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090899187] [2024-09-17 18:34:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090899187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:34:05,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:34:05,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-17 18:34:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020910654] [2024-09-17 18:34:05,423 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:05,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:34:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:34:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:34:05,424 INFO L87 Difference]: Start difference. First operand 432 states and 601 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-17 18:34:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:06,642 INFO L93 Difference]: Finished difference Result 466 states and 646 transitions. [2024-09-17 18:34:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:34:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 139 [2024-09-17 18:34:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:06,646 INFO L225 Difference]: With dead ends: 466 [2024-09-17 18:34:06,646 INFO L226 Difference]: Without dead ends: 464 [2024-09-17 18:34:06,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:34:06,647 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:06,647 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 465 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:34:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-09-17 18:34:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2024-09-17 18:34:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 242 states have internal predecessors, (278), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-17 18:34:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 642 transitions. [2024-09-17 18:34:06,934 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 642 transitions. Word has length 139 [2024-09-17 18:34:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:06,935 INFO L474 AbstractCegarLoop]: Abstraction has 462 states and 642 transitions. [2024-09-17 18:34:06,935 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-17 18:34:06,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 642 transitions. [2024-09-17 18:34:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-17 18:34:06,936 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:06,936 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:06,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-17 18:34:07,136 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 [2024-09-17 18:34:07,137 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:07,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:07,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1541639723, now seen corresponding path program 8 times [2024-09-17 18:34:07,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:07,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32462485] [2024-09-17 18:34:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:07,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:07,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173973185] [2024-09-17 18:34:07,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:34:07,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:07,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:07,160 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) [2024-09-17 18:34:07,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-17 18:34:07,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:34:07,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:07,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-17 18:34:07,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 96 proven. 107 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-17 18:34:08,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:16,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:16,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32462485] [2024-09-17 18:34:16,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:16,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173973185] [2024-09-17 18:34:16,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173973185] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:34:16,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:34:16,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-17 18:34:16,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128164835] [2024-09-17 18:34:16,823 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:16,823 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:34:16,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:34:16,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:34:16,824 INFO L87 Difference]: Start difference. First operand 462 states and 642 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-17 18:34:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:21,774 INFO L93 Difference]: Finished difference Result 472 states and 651 transitions. [2024-09-17 18:34:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:34:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 142 [2024-09-17 18:34:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:21,778 INFO L225 Difference]: With dead ends: 472 [2024-09-17 18:34:21,778 INFO L226 Difference]: Without dead ends: 470 [2024-09-17 18:34:21,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=243, Invalid=946, Unknown=1, NotChecked=0, Total=1190 [2024-09-17 18:34:21,779 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:21,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:34:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-09-17 18:34:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 466. [2024-09-17 18:34:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 244 states have (on average 1.151639344262295) internal successors, (281), 245 states have internal predecessors, (281), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-17 18:34:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 645 transitions. [2024-09-17 18:34:22,088 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 645 transitions. Word has length 142 [2024-09-17 18:34:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:22,088 INFO L474 AbstractCegarLoop]: Abstraction has 466 states and 645 transitions. [2024-09-17 18:34:22,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-17 18:34:22,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 645 transitions. [2024-09-17 18:34:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-17 18:34:22,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:22,090 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:22,105 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-17 18:34:22,291 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:22,291 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:22,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1016913677, now seen corresponding path program 9 times [2024-09-17 18:34:22,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:22,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585112161] [2024-09-17 18:34:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:22,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:22,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480747966] [2024-09-17 18:34:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:34:22,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:22,314 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-17 18:34:22,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:34:22,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:22,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-17 18:34:22,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 97 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-09-17 18:34:24,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585112161] [2024-09-17 18:34:25,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480747966] [2024-09-17 18:34:25,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480747966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:34:25,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:34:25,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 18:34:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895258930] [2024-09-17 18:34:25,070 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:25,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:34:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:34:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:34:25,071 INFO L87 Difference]: Start difference. First operand 466 states and 645 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-17 18:34:26,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:26,640 INFO L93 Difference]: Finished difference Result 486 states and 662 transitions. [2024-09-17 18:34:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:34:26,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 142 [2024-09-17 18:34:26,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:26,643 INFO L225 Difference]: With dead ends: 486 [2024-09-17 18:34:26,643 INFO L226 Difference]: Without dead ends: 484 [2024-09-17 18:34:26,643 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:34:26,644 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:26,644 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 541 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-17 18:34:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-17 18:34:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2024-09-17 18:34:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1462450592885376) internal successors, (290), 254 states have internal predecessors, (290), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-17 18:34:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 654 transitions. [2024-09-17 18:34:27,004 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 654 transitions. Word has length 142 [2024-09-17 18:34:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:27,004 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 654 transitions. [2024-09-17 18:34:27,005 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-17 18:34:27,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 654 transitions. [2024-09-17 18:34:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-17 18:34:27,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:27,007 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:27,027 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-17 18:34:27,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-17 18:34:27,208 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:27,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1445963081, now seen corresponding path program 3 times [2024-09-17 18:34:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115512447] [2024-09-17 18:34:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:27,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115130069] [2024-09-17 18:34:27,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:34:27,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:27,225 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:27,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-17 18:34:27,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:34:27,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:27,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-17 18:34:27,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 95 proven. 37 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-09-17 18:34:28,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:32,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115512447] [2024-09-17 18:34:32,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:32,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115130069] [2024-09-17 18:34:32,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115130069] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:34:32,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:34:32,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-17 18:34:32,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656623110] [2024-09-17 18:34:32,708 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:32,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:34:32,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:34:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-17 18:34:32,709 INFO L87 Difference]: Start difference. First operand 478 states and 654 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:34:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:33,512 INFO L93 Difference]: Finished difference Result 488 states and 663 transitions. [2024-09-17 18:34:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:34:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 145 [2024-09-17 18:34:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:33,515 INFO L225 Difference]: With dead ends: 488 [2024-09-17 18:34:33,515 INFO L226 Difference]: Without dead ends: 481 [2024-09-17 18:34:33,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-17 18:34:33,516 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:33,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 233 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:34:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-17 18:34:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2024-09-17 18:34:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1422924901185771) internal successors, (289), 254 states have internal predecessors, (289), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-17 18:34:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 653 transitions. [2024-09-17 18:34:33,828 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 653 transitions. Word has length 145 [2024-09-17 18:34:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:33,828 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 653 transitions. [2024-09-17 18:34:33,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:34:33,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 653 transitions. [2024-09-17 18:34:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-09-17 18:34:33,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:33,831 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:33,846 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-17 18:34:34,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-17 18:34:34,032 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:34,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1961731402, now seen corresponding path program 10 times [2024-09-17 18:34:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:34,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010924854] [2024-09-17 18:34:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:34,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854745370] [2024-09-17 18:34:34,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:34:34,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:34,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:34,055 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:34,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-17 18:34:34,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:34:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:34,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-17 18:34:34,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 95 proven. 89 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2024-09-17 18:34:34,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 123 proven. 7 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-09-17 18:34:34,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010924854] [2024-09-17 18:34:34,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854745370] [2024-09-17 18:34:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854745370] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:34:34,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:34:34,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2024-09-17 18:34:34,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039551072] [2024-09-17 18:34:34,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:34,932 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:34:34,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:34,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:34:34,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:34:34,933 INFO L87 Difference]: Start difference. First operand 478 states and 653 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-17 18:34:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:38,221 INFO L93 Difference]: Finished difference Result 501 states and 679 transitions. [2024-09-17 18:34:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 18:34:38,222 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 154 [2024-09-17 18:34:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:38,224 INFO L225 Difference]: With dead ends: 501 [2024-09-17 18:34:38,224 INFO L226 Difference]: Without dead ends: 499 [2024-09-17 18:34:38,225 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:34:38,225 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:38,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-17 18:34:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-17 18:34:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 486. [2024-09-17 18:34:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 259 states have (on average 1.138996138996139) internal successors, (295), 260 states have internal predecessors, (295), 183 states have call successors, (183), 44 states have call predecessors, (183), 43 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-17 18:34:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 659 transitions. [2024-09-17 18:34:38,658 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 659 transitions. Word has length 154 [2024-09-17 18:34:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:38,658 INFO L474 AbstractCegarLoop]: Abstraction has 486 states and 659 transitions. [2024-09-17 18:34:38,658 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-17 18:34:38,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 659 transitions. [2024-09-17 18:34:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-17 18:34:38,660 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:38,660 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:38,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-17 18:34:38,860 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-17 18:34:38,861 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:38,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1660634611, now seen corresponding path program 11 times [2024-09-17 18:34:38,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:38,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460316792] [2024-09-17 18:34:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:38,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724433801] [2024-09-17 18:34:38,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:34:38,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:38,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:38,895 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:38,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-17 18:34:39,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 18:34:39,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:39,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-17 18:34:39,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-17 18:34:39,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-17 18:34:40,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460316792] [2024-09-17 18:34:40,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724433801] [2024-09-17 18:34:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724433801] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:34:40,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:34:40,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-09-17 18:34:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877491969] [2024-09-17 18:34:40,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:40,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-17 18:34:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-17 18:34:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:34:40,641 INFO L87 Difference]: Start difference. First operand 486 states and 659 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-17 18:34:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:42,338 INFO L93 Difference]: Finished difference Result 523 states and 714 transitions. [2024-09-17 18:34:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:34:42,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 159 [2024-09-17 18:34:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:42,342 INFO L225 Difference]: With dead ends: 523 [2024-09-17 18:34:42,342 INFO L226 Difference]: Without dead ends: 521 [2024-09-17 18:34:42,343 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:34:42,344 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:42,344 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 625 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-17 18:34:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-09-17 18:34:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 490. [2024-09-17 18:34:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 262 states have (on average 1.1374045801526718) internal successors, (298), 263 states have internal predecessors, (298), 183 states have call successors, (183), 45 states have call predecessors, (183), 44 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-17 18:34:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 662 transitions. [2024-09-17 18:34:42,848 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 662 transitions. Word has length 159 [2024-09-17 18:34:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:42,848 INFO L474 AbstractCegarLoop]: Abstraction has 490 states and 662 transitions. [2024-09-17 18:34:42,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-17 18:34:42,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 662 transitions. [2024-09-17 18:34:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-09-17 18:34:42,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:42,851 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:42,861 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-17 18:34:43,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-17 18:34:43,052 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:43,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:43,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1550967297, now seen corresponding path program 12 times [2024-09-17 18:34:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:43,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227168535] [2024-09-17 18:34:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:43,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553793930] [2024-09-17 18:34:43,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:34:43,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:43,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:43,085 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:43,090 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-17 18:34:43,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 18:34:43,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:34:43,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-17 18:34:43,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2024-09-17 18:34:43,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:34:44,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:34:44,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227168535] [2024-09-17 18:34:44,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:34:44,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553793930] [2024-09-17 18:34:44,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553793930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:34:44,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:34:44,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-17 18:34:44,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979899074] [2024-09-17 18:34:44,231 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:34:44,231 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:34:44,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:34:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:34:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:34:44,232 INFO L87 Difference]: Start difference. First operand 490 states and 662 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-17 18:34:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:34:45,138 INFO L93 Difference]: Finished difference Result 502 states and 672 transitions. [2024-09-17 18:34:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:34:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 161 [2024-09-17 18:34:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:34:45,141 INFO L225 Difference]: With dead ends: 502 [2024-09-17 18:34:45,141 INFO L226 Difference]: Without dead ends: 500 [2024-09-17 18:34:45,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:34:45,142 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:34:45,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 287 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:34:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-09-17 18:34:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 459. [2024-09-17 18:34:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 249 states have internal predecessors, (281), 167 states have call successors, (167), 44 states have call predecessors, (167), 43 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-17 18:34:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 613 transitions. [2024-09-17 18:34:45,580 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 613 transitions. Word has length 161 [2024-09-17 18:34:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:34:45,581 INFO L474 AbstractCegarLoop]: Abstraction has 459 states and 613 transitions. [2024-09-17 18:34:45,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-17 18:34:45,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 613 transitions. [2024-09-17 18:34:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-17 18:34:45,583 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:34:45,584 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:34:45,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-17 18:34:45,784 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:45,785 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:34:45,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:34:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 359715818, now seen corresponding path program 13 times [2024-09-17 18:34:45,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:34:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873283548] [2024-09-17 18:34:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:34:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:34:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:34:45,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390468301] [2024-09-17 18:34:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:34:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:34:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:34:45,815 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:34:45,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-17 18:34:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:34:45,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-17 18:34:45,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:34:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 116 proven. 157 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2024-09-17 18:34:47,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:35:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:35:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873283548] [2024-09-17 18:35:28,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:35:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390468301] [2024-09-17 18:35:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390468301] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:35:28,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:35:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-17 18:35:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263512098] [2024-09-17 18:35:28,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:35:28,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:35:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:35:28,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:35:28,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=932, Unknown=2, NotChecked=0, Total=1122 [2024-09-17 18:35:28,155 INFO L87 Difference]: Start difference. First operand 459 states and 613 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-17 18:35:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:35:29,362 INFO L93 Difference]: Finished difference Result 483 states and 639 transitions. [2024-09-17 18:35:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:35:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-17 18:35:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:35:29,366 INFO L225 Difference]: With dead ends: 483 [2024-09-17 18:35:29,366 INFO L226 Difference]: Without dead ends: 481 [2024-09-17 18:35:29,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=294, Invalid=1426, Unknown=2, NotChecked=0, Total=1722 [2024-09-17 18:35:29,368 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:35:29,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 409 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:35:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-17 18:35:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2024-09-17 18:35:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 259 states have (on average 1.1312741312741312) internal successors, (293), 260 states have internal predecessors, (293), 171 states have call successors, (171), 47 states have call predecessors, (171), 46 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-17 18:35:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 633 transitions. [2024-09-17 18:35:29,804 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 633 transitions. Word has length 164 [2024-09-17 18:35:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:35:29,804 INFO L474 AbstractCegarLoop]: Abstraction has 477 states and 633 transitions. [2024-09-17 18:35:29,804 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-17 18:35:29,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 633 transitions. [2024-09-17 18:35:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-17 18:35:29,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:35:29,807 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:35:29,826 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-17 18:35:30,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-17 18:35:30,008 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:35:30,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1256755380, now seen corresponding path program 14 times [2024-09-17 18:35:30,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:35:30,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863766696] [2024-09-17 18:35:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:35:30,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:35:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:35:30,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004641155] [2024-09-17 18:35:30,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:35:30,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:35:30,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:35:30,046 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:35:30,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-17 18:35:30,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:35:30,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:35:30,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-17 18:35:30,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:35:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 210 proven. 156 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2024-09-17 18:35:34,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:35:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:35:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863766696] [2024-09-17 18:35:35,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:35:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004641155] [2024-09-17 18:35:35,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004641155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:35:35,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:35:35,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-17 18:35:35,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303921850] [2024-09-17 18:35:35,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:35:35,392 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:35:35,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:35:35,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:35:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:35:35,393 INFO L87 Difference]: Start difference. First operand 477 states and 633 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-17 18:35:42,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-17 18:35:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:35:45,476 INFO L93 Difference]: Finished difference Result 526 states and 697 transitions. [2024-09-17 18:35:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:35:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-17 18:35:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:35:45,478 INFO L225 Difference]: With dead ends: 526 [2024-09-17 18:35:45,479 INFO L226 Difference]: Without dead ends: 524 [2024-09-17 18:35:45,479 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-09-17 18:35:45,480 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:35:45,480 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 812 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 849 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2024-09-17 18:35:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-09-17 18:35:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 514. [2024-09-17 18:35:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 280 states have (on average 1.1285714285714286) internal successors, (316), 281 states have internal predecessors, (316), 183 states have call successors, (183), 51 states have call predecessors, (183), 50 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-17 18:35:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 680 transitions. [2024-09-17 18:35:45,932 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 680 transitions. Word has length 164 [2024-09-17 18:35:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:35:45,933 INFO L474 AbstractCegarLoop]: Abstraction has 514 states and 680 transitions. [2024-09-17 18:35:45,933 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-17 18:35:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 680 transitions. [2024-09-17 18:35:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-09-17 18:35:45,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:35:45,935 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:35:45,953 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-17 18:35:46,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:35:46,135 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:35:46,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:46,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1039525467, now seen corresponding path program 15 times [2024-09-17 18:35:46,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:35:46,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932701829] [2024-09-17 18:35:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:35:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:35:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:35:46,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240317880] [2024-09-17 18:35:46,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:35:46,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:35:46,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:35:46,165 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:35:46,166 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-17 18:35:46,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:35:46,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:35:46,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-17 18:35:46,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:35:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 174 proven. 32 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-09-17 18:35:52,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:35:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:35:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932701829] [2024-09-17 18:35:52,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:35:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240317880] [2024-09-17 18:35:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240317880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:35:52,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:35:52,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 18:35:52,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234432423] [2024-09-17 18:35:52,423 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:35:52,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:35:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:35:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:35:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:35:52,424 INFO L87 Difference]: Start difference. First operand 514 states and 680 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-17 18:35:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:35:55,078 INFO L93 Difference]: Finished difference Result 574 states and 765 transitions. [2024-09-17 18:35:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-17 18:35:55,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 167 [2024-09-17 18:35:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:35:55,083 INFO L225 Difference]: With dead ends: 574 [2024-09-17 18:35:55,083 INFO L226 Difference]: Without dead ends: 572 [2024-09-17 18:35:55,083 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 18:35:55,084 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:35:55,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 486 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:35:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-17 18:35:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2024-09-17 18:35:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 307 states have (on average 1.1302931596091206) internal successors, (347), 308 states have internal predecessors, (347), 207 states have call successors, (207), 54 states have call predecessors, (207), 53 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-17 18:35:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 759 transitions. [2024-09-17 18:35:55,528 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 759 transitions. Word has length 167 [2024-09-17 18:35:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:35:55,529 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 759 transitions. [2024-09-17 18:35:55,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-17 18:35:55,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 759 transitions. [2024-09-17 18:35:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-17 18:35:55,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:35:55,531 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:35:55,550 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-17 18:35:55,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:35:55,732 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:35:55,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:35:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash 487523073, now seen corresponding path program 4 times [2024-09-17 18:35:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:35:55,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503243260] [2024-09-17 18:35:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:35:55,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:35:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:35:55,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488434600] [2024-09-17 18:35:55,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:35:55,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:35:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:35:55,756 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:35:55,758 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-17 18:35:55,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:35:55,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:35:55,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-17 18:35:55,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:35:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 113 proven. 110 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-17 18:35:57,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:36:01,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:36:01,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503243260] [2024-09-17 18:36:01,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:36:01,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488434600] [2024-09-17 18:36:01,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488434600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:36:01,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:36:01,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-17 18:36:01,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079336991] [2024-09-17 18:36:01,070 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:36:01,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:36:01,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:36:01,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:36:01,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:36:01,071 INFO L87 Difference]: Start difference. First operand 568 states and 759 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-17 18:36:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:36:03,025 INFO L93 Difference]: Finished difference Result 628 states and 839 transitions. [2024-09-17 18:36:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:36:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 170 [2024-09-17 18:36:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:36:03,029 INFO L225 Difference]: With dead ends: 628 [2024-09-17 18:36:03,029 INFO L226 Difference]: Without dead ends: 621 [2024-09-17 18:36:03,029 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 18:36:03,030 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-17 18:36:03,030 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 490 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-17 18:36:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-09-17 18:36:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 596. [2024-09-17 18:36:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 323 states have (on average 1.130030959752322) internal successors, (365), 324 states have internal predecessors, (365), 215 states have call successors, (215), 58 states have call predecessors, (215), 57 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2024-09-17 18:36:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 793 transitions. [2024-09-17 18:36:03,493 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 793 transitions. Word has length 170 [2024-09-17 18:36:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:36:03,493 INFO L474 AbstractCegarLoop]: Abstraction has 596 states and 793 transitions. [2024-09-17 18:36:03,494 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-17 18:36:03,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 793 transitions. [2024-09-17 18:36:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-17 18:36:03,496 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:36:03,496 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:36:03,513 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-17 18:36:03,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-17 18:36:03,701 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:36:03,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:36:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1959567971, now seen corresponding path program 5 times [2024-09-17 18:36:03,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:36:03,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972818494] [2024-09-17 18:36:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:36:03,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:36:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:36:03,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147057646] [2024-09-17 18:36:03,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:36:03,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:36:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:36:03,727 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:36:03,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-17 18:36:03,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-17 18:36:03,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:36:03,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-17 18:36:03,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:36:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 133 proven. 144 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2024-09-17 18:36:32,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:36:36,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:36:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972818494] [2024-09-17 18:36:36,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:36:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147057646] [2024-09-17 18:36:36,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147057646] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:36:36,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:36:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-17 18:36:36,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583467553] [2024-09-17 18:36:36,020 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:36:36,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:36:36,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:36:36,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:36:36,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=611, Unknown=5, NotChecked=0, Total=702 [2024-09-17 18:36:36,021 INFO L87 Difference]: Start difference. First operand 596 states and 793 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29)