./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/watermelon.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/loops-crafted-1/watermelon.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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:49:20,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:49:20,324 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:49:20,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:49:20,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:49:20,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:49:20,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:49:20,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:49:20,360 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:49:20,362 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:49:20,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:49:20,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:49:20,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:49:20,363 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:49:20,365 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:49:20,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:49:20,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:49:20,366 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:49:20,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:49:20,367 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:49:20,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:49:20,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:49:20,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:49:20,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:49:20,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:49:20,372 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:49:20,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:49:20,372 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:49:20,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:49:20,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:49:20,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:49:20,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:49:20,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:49:20,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:49:20,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:49:20,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:49:20,375 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:49:20,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:49:20,376 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:49:20,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:49:20,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:49:20,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:49:20,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:49:20,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:49:20,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:49:20,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:49:20,653 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:49:20,653 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:49:20,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-18 15:49:22,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:49:22,255 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:49:22,256 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-18 15:49:22,268 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bb24f38df/64270fab81824e56b4fc80a240e12395/FLAGfc8420269 [2024-09-18 15:49:22,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bb24f38df/64270fab81824e56b4fc80a240e12395 [2024-09-18 15:49:22,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:49:22,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:49:22,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:49:22,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:49:22,294 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:49:22,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540249d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22, skipping insertion in model container [2024-09-18 15:49:22,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,316 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:49:22,480 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/loops-crafted-1/watermelon.c[373,386] [2024-09-18 15:49:22,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:49:22,524 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:49:22,537 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/loops-crafted-1/watermelon.c[373,386] [2024-09-18 15:49:22,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:49:22,563 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:49:22,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22 WrapperNode [2024-09-18 15:49:22,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:49:22,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:49:22,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:49:22,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:49:22,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,584 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:49:22,585 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:49:22,585 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:49:22,585 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:49:22,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:49:22,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,601 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,618 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-18 15:49:22,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,622 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:49:22,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:49:22,630 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:49:22,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:49:22,631 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (1/1) ... [2024-09-18 15:49:22,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:49:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:22,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 15:49:22,671 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 15:49:22,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:49:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-09-18 15:49:22,713 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-09-18 15:49:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:49:22,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:49:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:49:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-09-18 15:49:22,715 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-09-18 15:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:49:22,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:49:22,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:49:22,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:49:22,771 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:49:22,773 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:49:22,945 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-18 15:49:22,946 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:49:22,985 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:49:22,989 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:49:22,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:49:22 BoogieIcfgContainer [2024-09-18 15:49:22,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:49:22,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:49:22,994 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:49:22,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:49:22,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:49:22" (1/3) ... [2024-09-18 15:49:22,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e25b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:49:22, skipping insertion in model container [2024-09-18 15:49:22,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:49:22" (2/3) ... [2024-09-18 15:49:22,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e25b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:49:22, skipping insertion in model container [2024-09-18 15:49:22,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:49:22" (3/3) ... [2024-09-18 15:49:22,999 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2024-09-18 15:49:23,032 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:49:23,032 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:49:23,097 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:49:23,103 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;@9f76d9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:49:23,104 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:49:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:49:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-18 15:49:23,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:23,115 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:23,115 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:23,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1545535369, now seen corresponding path program 1 times [2024-09-18 15:49:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:23,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644144465] [2024-09-18 15:49:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:23,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:23,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:23,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:49:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:23,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:23,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644144465] [2024-09-18 15:49:23,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644144465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:23,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:49:23,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-18 15:49:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251834164] [2024-09-18 15:49:23,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:23,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:49:23,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:49:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:49:23,840 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:24,397 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2024-09-18 15:49:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:49:24,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-18 15:49:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:24,406 INFO L225 Difference]: With dead ends: 80 [2024-09-18 15:49:24,407 INFO L226 Difference]: Without dead ends: 39 [2024-09-18 15:49:24,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:49:24,414 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:24,415 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:49:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-18 15:49:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-09-18 15:49:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-18 15:49:24,458 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2024-09-18 15:49:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:24,459 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-18 15:49:24,459 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:24,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-18 15:49:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-18 15:49:24,461 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:24,461 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:24,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:49:24,462 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:24,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash 964775093, now seen corresponding path program 1 times [2024-09-18 15:49:24,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:24,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363904759] [2024-09-18 15:49:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:24,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:49:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:24,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363904759] [2024-09-18 15:49:24,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363904759] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:24,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:49:24,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:49:24,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129536278] [2024-09-18 15:49:24,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:24,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:49:24,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:49:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:49:24,540 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:49:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:24,627 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-09-18 15:49:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:49:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-18 15:49:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:24,629 INFO L225 Difference]: With dead ends: 51 [2024-09-18 15:49:24,629 INFO L226 Difference]: Without dead ends: 38 [2024-09-18 15:49:24,629 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:49:24,631 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:24,632 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-18 15:49:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-18 15:49:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-18 15:49:24,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 25 [2024-09-18 15:49:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:24,646 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-18 15:49:24,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:49:24,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-18 15:49:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-18 15:49:24,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:24,649 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:24,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:49:24,650 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:24,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1908872900, now seen corresponding path program 1 times [2024-09-18 15:49:24,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447254864] [2024-09-18 15:49:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:49:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:24,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447254864] [2024-09-18 15:49:24,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447254864] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:24,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:49:24,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:49:24,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48684605] [2024-09-18 15:49:24,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:24,738 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:49:24,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:24,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:49:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:49:24,739 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:24,815 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-18 15:49:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:49:24,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-18 15:49:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:24,816 INFO L225 Difference]: With dead ends: 67 [2024-09-18 15:49:24,816 INFO L226 Difference]: Without dead ends: 39 [2024-09-18 15:49:24,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:49:24,818 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:24,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-18 15:49:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-18 15:49:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-09-18 15:49:24,833 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2024-09-18 15:49:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:24,834 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-09-18 15:49:24,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:24,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-09-18 15:49:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:49:24,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:24,837 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:24,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:49:24,838 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:24,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1551444720, now seen corresponding path program 1 times [2024-09-18 15:49:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:24,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564339925] [2024-09-18 15:49:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:24,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 15:49:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:24,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:24,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564339925] [2024-09-18 15:49:24,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564339925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88694960] [2024-09-18 15:49:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:24,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:24,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:24,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:24,975 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:49:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:25,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:49:25,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:49:25,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:49:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88694960] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:49:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2024-09-18 15:49:25,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414543427] [2024-09-18 15:49:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:25,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:49:25,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:49:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:49:25,260 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:25,361 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-09-18 15:49:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:49:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-18 15:49:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:25,363 INFO L225 Difference]: With dead ends: 51 [2024-09-18 15:49:25,363 INFO L226 Difference]: Without dead ends: 41 [2024-09-18 15:49:25,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:49:25,364 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:25,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-18 15:49:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-18 15:49:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-09-18 15:49:25,376 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2024-09-18 15:49:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:25,377 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-09-18 15:49:25,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:25,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-09-18 15:49:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:49:25,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:25,379 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:25,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:49:25,580 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:25,581 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:25,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1138172918, now seen corresponding path program 1 times [2024-09-18 15:49:25,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:25,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599071007] [2024-09-18 15:49:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:25,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:25,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:25,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:49:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:25,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599071007] [2024-09-18 15:49:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599071007] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:25,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013712044] [2024-09-18 15:49:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:25,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:25,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:49:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:25,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:49:25,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:25,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:25,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013712044] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:25,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:25,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-09-18 15:49:25,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348827342] [2024-09-18 15:49:25,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:25,821 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:49:25,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:49:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:49:25,822 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:49:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:25,984 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-09-18 15:49:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:49:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-18 15:49:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:25,986 INFO L225 Difference]: With dead ends: 68 [2024-09-18 15:49:25,987 INFO L226 Difference]: Without dead ends: 40 [2024-09-18 15:49:25,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:49:25,988 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:25,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-18 15:49:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-18 15:49:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-09-18 15:49:26,003 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2024-09-18 15:49:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:26,004 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-09-18 15:49:26,004 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:49:26,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-09-18 15:49:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 15:49:26,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:26,006 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:26,023 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:49:26,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:26,207 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:26,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1107312764, now seen corresponding path program 2 times [2024-09-18 15:49:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:26,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190077484] [2024-09-18 15:49:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:26,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:49:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:49:26,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190077484] [2024-09-18 15:49:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190077484] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:26,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:49:26,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-18 15:49:26,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740867153] [2024-09-18 15:49:26,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:26,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:49:26,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:26,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:49:26,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:49:26,396 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:26,587 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-09-18 15:49:26,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:49:26,587 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-18 15:49:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:26,588 INFO L225 Difference]: With dead ends: 48 [2024-09-18 15:49:26,588 INFO L226 Difference]: Without dead ends: 40 [2024-09-18 15:49:26,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:49:26,590 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:26,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-18 15:49:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-18 15:49:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-18 15:49:26,603 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2024-09-18 15:49:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:26,603 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-18 15:49:26,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:26,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-18 15:49:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:49:26,604 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:26,604 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:26,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-18 15:49:26,604 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:26,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash 545445883, now seen corresponding path program 1 times [2024-09-18 15:49:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:26,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858688427] [2024-09-18 15:49:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:49:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:49:26,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:26,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858688427] [2024-09-18 15:49:26,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858688427] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:26,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136836826] [2024-09-18 15:49:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:26,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:26,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:26,719 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:49:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:26,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:49:26,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:49:26,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:49:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136836826] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:26,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:26,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2024-09-18 15:49:26,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110551084] [2024-09-18 15:49:26,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:26,854 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:49:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:49:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:49:26,855 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:49:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:27,035 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-09-18 15:49:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:49:27,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-18 15:49:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:27,036 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:49:27,038 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 15:49:27,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:49:27,039 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:27,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 15:49:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-18 15:49:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-09-18 15:49:27,055 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 31 [2024-09-18 15:49:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:27,055 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-09-18 15:49:27,055 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 15:49:27,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-09-18 15:49:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:49:27,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:27,058 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:27,074 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:49:27,258 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 15:49:27,258 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:27,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash -60565722, now seen corresponding path program 1 times [2024-09-18 15:49:27,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:27,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243500312] [2024-09-18 15:49:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:27,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:27,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:27,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:27,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:49:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:49:27,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:27,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243500312] [2024-09-18 15:49:27,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243500312] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:27,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894731889] [2024-09-18 15:49:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:27,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:27,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:27,363 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:49:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:27,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:49:27,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:49:27,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:49:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894731889] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:27,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:27,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-18 15:49:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512076821] [2024-09-18 15:49:27,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:27,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:49:27,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:49:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:49:27,524 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:49:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:27,681 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2024-09-18 15:49:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:49:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2024-09-18 15:49:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:27,683 INFO L225 Difference]: With dead ends: 54 [2024-09-18 15:49:27,683 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 15:49:27,684 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:49:27,685 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:27,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 15:49:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-18 15:49:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 15:49:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-09-18 15:49:27,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 32 [2024-09-18 15:49:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:27,712 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-09-18 15:49:27,713 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-18 15:49:27,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-09-18 15:49:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:49:27,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:27,715 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:27,735 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:27,921 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:27,922 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:27,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 619492648, now seen corresponding path program 1 times [2024-09-18 15:49:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:27,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515486293] [2024-09-18 15:49:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:49:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:49:28,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515486293] [2024-09-18 15:49:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515486293] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:49:28,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:49:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-18 15:49:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223870685] [2024-09-18 15:49:28,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:49:28,092 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:49:28,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:49:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:49:28,093 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:28,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:28,401 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2024-09-18 15:49:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:49:28,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-18 15:49:28,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:28,403 INFO L225 Difference]: With dead ends: 53 [2024-09-18 15:49:28,403 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 15:49:28,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:49:28,404 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:28,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 15:49:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-09-18 15:49:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-09-18 15:49:28,414 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 32 [2024-09-18 15:49:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:28,414 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-09-18 15:49:28,415 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:28,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-09-18 15:49:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:49:28,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:28,416 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:28,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-18 15:49:28,416 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:28,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2067916900, now seen corresponding path program 2 times [2024-09-18 15:49:28,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:28,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79125839] [2024-09-18 15:49:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:28,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-18 15:49:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79125839] [2024-09-18 15:49:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79125839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735962780] [2024-09-18 15:49:28,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:49:28,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:28,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:28,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:28,745 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:49:28,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:49:28,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:28,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 15:49:28,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:28,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:29,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735962780] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:29,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:29,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-18 15:49:29,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14980540] [2024-09-18 15:49:29,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:29,357 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-18 15:49:29,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-18 15:49:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:49:29,358 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:29,791 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-09-18 15:49:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:49:29,792 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-18 15:49:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:29,793 INFO L225 Difference]: With dead ends: 61 [2024-09-18 15:49:29,793 INFO L226 Difference]: Without dead ends: 51 [2024-09-18 15:49:29,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-18 15:49:29,795 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:29,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-18 15:49:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2024-09-18 15:49:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2024-09-18 15:49:29,811 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2024-09-18 15:49:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:29,811 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2024-09-18 15:49:29,811 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:29,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2024-09-18 15:49:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:49:29,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:29,813 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:29,829 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:49:30,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-18 15:49:30,017 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:30,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1242434853, now seen corresponding path program 2 times [2024-09-18 15:49:30,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:30,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419712981] [2024-09-18 15:49:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:30,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:30,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:30,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:30,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 15:49:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:30,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419712981] [2024-09-18 15:49:30,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419712981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:30,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321497590] [2024-09-18 15:49:30,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:49:30,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:30,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:30,321 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:30,323 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:49:30,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:49:30,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:30,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 15:49:30,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:30,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:30,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321497590] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:30,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:30,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-18 15:49:30,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64474247] [2024-09-18 15:49:30,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:30,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-18 15:49:30,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-18 15:49:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:49:30,896 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:31,319 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2024-09-18 15:49:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:49:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-18 15:49:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:31,321 INFO L225 Difference]: With dead ends: 55 [2024-09-18 15:49:31,323 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 15:49:31,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-18 15:49:31,324 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:31,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 15:49:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-18 15:49:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-09-18 15:49:31,338 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 33 [2024-09-18 15:49:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:31,338 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-09-18 15:49:31,338 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:31,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-09-18 15:49:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 15:49:31,339 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:31,339 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:31,356 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:49:31,540 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 15:49:31,540 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:31,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1389102369, now seen corresponding path program 3 times [2024-09-18 15:49:31,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:31,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682725998] [2024-09-18 15:49:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:31,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:31,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:31,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:31,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-18 15:49:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:31,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:31,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682725998] [2024-09-18 15:49:31,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682725998] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:31,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535616191] [2024-09-18 15:49:31,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:49:31,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:31,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:31,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:31,866 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:49:31,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:49:31,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:31,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 15:49:31,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:32,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:32,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535616191] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:32,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:32,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-18 15:49:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408897566] [2024-09-18 15:49:32,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:32,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-18 15:49:32,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-18 15:49:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 15:49:32,609 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:33,123 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-09-18 15:49:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:49:33,124 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-18 15:49:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:33,125 INFO L225 Difference]: With dead ends: 61 [2024-09-18 15:49:33,125 INFO L226 Difference]: Without dead ends: 50 [2024-09-18 15:49:33,127 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-18 15:49:33,128 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:33,128 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-18 15:49:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2024-09-18 15:49:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-09-18 15:49:33,141 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 34 [2024-09-18 15:49:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:33,142 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-09-18 15:49:33,142 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:33,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-09-18 15:49:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 15:49:33,143 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:33,143 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:33,158 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:33,343 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:33,344 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:33,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1131745825, now seen corresponding path program 3 times [2024-09-18 15:49:33,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:33,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351880160] [2024-09-18 15:49:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:33,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:33,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:33,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:33,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-18 15:49:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:33,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:33,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351880160] [2024-09-18 15:49:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351880160] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:33,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883668472] [2024-09-18 15:49:33,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:49:33,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:33,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:33,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:33,659 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:49:33,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:49:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:33,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 15:49:33,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:33,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:34,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883668472] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:34,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:34,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-18 15:49:34,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517639188] [2024-09-18 15:49:34,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:34,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-18 15:49:34,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-18 15:49:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 15:49:34,362 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:34,816 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-09-18 15:49:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:49:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-18 15:49:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:34,818 INFO L225 Difference]: With dead ends: 56 [2024-09-18 15:49:34,818 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 15:49:34,819 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-18 15:49:34,819 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:34,820 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 15:49:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-18 15:49:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-09-18 15:49:34,832 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2024-09-18 15:49:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:34,836 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-09-18 15:49:34,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:34,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-09-18 15:49:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:49:34,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:34,838 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:34,850 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:35,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:35,040 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:35,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1974259355, now seen corresponding path program 4 times [2024-09-18 15:49:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:35,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218570886] [2024-09-18 15:49:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:35,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:35,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:35,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-18 15:49:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218570886] [2024-09-18 15:49:35,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218570886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274775934] [2024-09-18 15:49:35,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:49:35,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:35,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:35,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:35,336 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:49:35,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:49:35,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:35,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 15:49:35,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:35,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:35,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274775934] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:35,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:35,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-18 15:49:35,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265165199] [2024-09-18 15:49:35,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:35,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-18 15:49:35,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-18 15:49:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 15:49:35,941 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:36,329 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-09-18 15:49:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:49:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-18 15:49:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:36,331 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:49:36,331 INFO L226 Difference]: Without dead ends: 53 [2024-09-18 15:49:36,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 15:49:36,332 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:36,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-18 15:49:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2024-09-18 15:49:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-09-18 15:49:36,344 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2024-09-18 15:49:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:36,344 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-09-18 15:49:36,344 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:36,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-09-18 15:49:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:49:36,345 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:36,346 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:36,362 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:49:36,549 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:49:36,550 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:36,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1359484736, now seen corresponding path program 4 times [2024-09-18 15:49:36,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:36,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723964577] [2024-09-18 15:49:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:36,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:36,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:36,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:36,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-18 15:49:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:36,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:36,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723964577] [2024-09-18 15:49:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723964577] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:36,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254316509] [2024-09-18 15:49:36,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:49:36,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:36,818 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:36,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:49:36,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:49:36,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:36,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 15:49:36,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:37,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:37,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254316509] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:37,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:37,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-18 15:49:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071592898] [2024-09-18 15:49:37,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:37,428 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-18 15:49:37,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-18 15:49:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 15:49:37,429 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:37,849 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2024-09-18 15:49:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:49:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-18 15:49:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:37,851 INFO L225 Difference]: With dead ends: 57 [2024-09-18 15:49:37,851 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 15:49:37,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 15:49:37,852 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:37,852 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 15:49:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-18 15:49:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-18 15:49:37,859 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 35 [2024-09-18 15:49:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:37,860 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-18 15:49:37,860 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:37,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-18 15:49:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 15:49:37,861 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:37,861 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:37,877 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:38,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 15:49:38,066 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:38,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1514281526, now seen corresponding path program 5 times [2024-09-18 15:49:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:38,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819748095] [2024-09-18 15:49:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:38,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:38,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:38,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-18 15:49:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:38,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819748095] [2024-09-18 15:49:38,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819748095] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068762083] [2024-09-18 15:49:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:49:38,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:38,363 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:38,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:49:38,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-18 15:49:38,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:38,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-18 15:49:38,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:38,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:39,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068762083] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:39,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:39,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-18 15:49:39,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816300936] [2024-09-18 15:49:39,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:39,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-18 15:49:39,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-18 15:49:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-18 15:49:39,146 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:39,568 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-09-18 15:49:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:49:39,568 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-18 15:49:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:39,569 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:49:39,569 INFO L226 Difference]: Without dead ends: 52 [2024-09-18 15:49:39,570 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-18 15:49:39,570 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:39,571 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-18 15:49:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-09-18 15:49:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2024-09-18 15:49:39,582 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 36 [2024-09-18 15:49:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:39,582 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2024-09-18 15:49:39,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:39,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2024-09-18 15:49:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 15:49:39,583 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:39,584 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:39,598 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:39,787 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 15:49:39,788 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:39,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1975485178, now seen corresponding path program 5 times [2024-09-18 15:49:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:39,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213980782] [2024-09-18 15:49:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:39,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:39,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:39,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-18 15:49:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:40,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213980782] [2024-09-18 15:49:40,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213980782] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403097950] [2024-09-18 15:49:40,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:49:40,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:40,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:40,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:40,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:49:40,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-18 15:49:40,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:40,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-18 15:49:40,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:40,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:40,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403097950] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:40,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:40,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-18 15:49:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149761414] [2024-09-18 15:49:40,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:40,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-18 15:49:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-18 15:49:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-18 15:49:40,815 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:41,231 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-09-18 15:49:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:49:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-18 15:49:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:41,232 INFO L225 Difference]: With dead ends: 58 [2024-09-18 15:49:41,232 INFO L226 Difference]: Without dead ends: 49 [2024-09-18 15:49:41,234 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-18 15:49:41,234 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:41,235 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-18 15:49:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-18 15:49:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-09-18 15:49:41,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2024-09-18 15:49:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:41,245 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-09-18 15:49:41,245 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:41,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-09-18 15:49:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 15:49:41,246 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:41,246 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:41,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 15:49:41,446 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 15:49:41,446 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:41,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1819133756, now seen corresponding path program 6 times [2024-09-18 15:49:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821593907] [2024-09-18 15:49:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:41,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:41,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:41,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:49:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:41,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:41,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821593907] [2024-09-18 15:49:41,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821593907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:41,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187131637] [2024-09-18 15:49:41,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:49:41,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:41,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:41,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:49:41,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-18 15:49:41,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:41,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:49:41,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:41,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187131637] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:42,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:42,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-18 15:49:42,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21273390] [2024-09-18 15:49:42,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:42,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-18 15:49:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:42,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-18 15:49:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 15:49:42,321 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:42,688 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-09-18 15:49:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:49:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-18 15:49:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:42,689 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:49:42,689 INFO L226 Difference]: Without dead ends: 55 [2024-09-18 15:49:42,690 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-18 15:49:42,690 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:42,691 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-18 15:49:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2024-09-18 15:49:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-09-18 15:49:42,699 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 37 [2024-09-18 15:49:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:42,700 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-09-18 15:49:42,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:42,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-09-18 15:49:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 15:49:42,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:42,701 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:42,716 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-18 15:49:42,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-18 15:49:42,902 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:42,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash -475395845, now seen corresponding path program 6 times [2024-09-18 15:49:42,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:42,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653019278] [2024-09-18 15:49:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:42,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:42,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:42,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:43,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-18 15:49:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:43,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:43,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653019278] [2024-09-18 15:49:43,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653019278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:43,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469536275] [2024-09-18 15:49:43,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:49:43,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:43,192 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:43,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 15:49:43,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-18 15:49:43,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:43,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:49:43,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:43,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:43,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469536275] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:43,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:43,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-18 15:49:43,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670953404] [2024-09-18 15:49:43,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:43,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-18 15:49:43,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:43,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-18 15:49:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 15:49:43,770 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:44,222 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2024-09-18 15:49:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:49:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-18 15:49:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:44,224 INFO L225 Difference]: With dead ends: 59 [2024-09-18 15:49:44,224 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 15:49:44,225 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-18 15:49:44,226 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:44,226 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 15:49:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-18 15:49:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2024-09-18 15:49:44,240 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2024-09-18 15:49:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:44,241 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2024-09-18 15:49:44,241 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:44,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2024-09-18 15:49:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-18 15:49:44,242 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:44,242 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:44,258 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-18 15:49:44,442 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:44,443 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:44,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1149616321, now seen corresponding path program 7 times [2024-09-18 15:49:44,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:44,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230645001] [2024-09-18 15:49:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:44,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:44,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:44,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:49:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230645001] [2024-09-18 15:49:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230645001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909774701] [2024-09-18 15:49:44,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:49:44,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:44,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:44,766 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 15:49:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:44,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 15:49:44,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:45,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:45,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909774701] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:45,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:45,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-18 15:49:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949316919] [2024-09-18 15:49:45,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:45,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-18 15:49:45,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-18 15:49:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-18 15:49:45,514 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:46,056 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-18 15:49:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 15:49:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-18 15:49:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:46,057 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:49:46,057 INFO L226 Difference]: Without dead ends: 54 [2024-09-18 15:49:46,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-18 15:49:46,059 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:46,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:49:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-18 15:49:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2024-09-18 15:49:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-09-18 15:49:46,069 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 38 [2024-09-18 15:49:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:46,070 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-09-18 15:49:46,070 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:46,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-09-18 15:49:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-18 15:49:46,071 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:46,071 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:46,087 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-18 15:49:46,275 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:46,276 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:46,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:46,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1335880383, now seen corresponding path program 7 times [2024-09-18 15:49:46,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:46,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115207230] [2024-09-18 15:49:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:46,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:46,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:46,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:49:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:46,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:46,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115207230] [2024-09-18 15:49:46,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115207230] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:46,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504796837] [2024-09-18 15:49:46,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:49:46,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:46,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:46,629 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:46,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 15:49:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:46,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 15:49:46,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:46,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504796837] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:47,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:47,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-18 15:49:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894109975] [2024-09-18 15:49:47,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:47,441 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-18 15:49:47,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-18 15:49:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-18 15:49:47,442 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:47,872 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-09-18 15:49:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 15:49:47,872 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-18 15:49:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:47,873 INFO L225 Difference]: With dead ends: 60 [2024-09-18 15:49:47,873 INFO L226 Difference]: Without dead ends: 51 [2024-09-18 15:49:47,875 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-18 15:49:47,875 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:47,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:49:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-18 15:49:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-18 15:49:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-09-18 15:49:47,885 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2024-09-18 15:49:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:47,885 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-09-18 15:49:47,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:47,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-09-18 15:49:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 15:49:47,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:47,886 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:47,908 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-18 15:49:48,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:48,087 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:48,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash 244399419, now seen corresponding path program 8 times [2024-09-18 15:49:48,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:48,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812875077] [2024-09-18 15:49:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:48,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:48,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:48,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:48,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:49:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812875077] [2024-09-18 15:49:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812875077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071808247] [2024-09-18 15:49:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:49:48,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:48,448 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:48,450 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 15:49:48,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:49:48,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:48,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:49:48,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:48,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:49,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071808247] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:49,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:49,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-18 15:49:49,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518734602] [2024-09-18 15:49:49,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:49,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-18 15:49:49,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-18 15:49:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 15:49:49,192 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:49,636 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-09-18 15:49:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 15:49:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-18 15:49:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:49,637 INFO L225 Difference]: With dead ends: 67 [2024-09-18 15:49:49,637 INFO L226 Difference]: Without dead ends: 57 [2024-09-18 15:49:49,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:49:49,639 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:49,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-18 15:49:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2024-09-18 15:49:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-18 15:49:49,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2024-09-18 15:49:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:49,648 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-18 15:49:49,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:49,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-18 15:49:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 15:49:49,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:49,649 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:49,666 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:49,852 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:49,853 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:49,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2122483680, now seen corresponding path program 8 times [2024-09-18 15:49:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:49,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330779563] [2024-09-18 15:49:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:49,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:49,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:50,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:49:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:50,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330779563] [2024-09-18 15:49:50,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330779563] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977470394] [2024-09-18 15:49:50,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:49:50,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:50,180 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 15:49:50,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:49:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:50,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:49:50,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:50,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:50,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977470394] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:50,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:50,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-18 15:49:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069237580] [2024-09-18 15:49:50,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:50,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-18 15:49:50,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-18 15:49:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-18 15:49:50,965 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:51,383 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2024-09-18 15:49:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 15:49:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-18 15:49:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:51,384 INFO L225 Difference]: With dead ends: 61 [2024-09-18 15:49:51,384 INFO L226 Difference]: Without dead ends: 49 [2024-09-18 15:49:51,385 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:49:51,385 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:51,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-18 15:49:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-18 15:49:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2024-09-18 15:49:51,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2024-09-18 15:49:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:51,393 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2024-09-18 15:49:51,393 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:51,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2024-09-18 15:49:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-18 15:49:51,394 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:51,394 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:51,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-18 15:49:51,594 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-18 15:49:51,594 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:51,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 694635306, now seen corresponding path program 9 times [2024-09-18 15:49:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126433119] [2024-09-18 15:49:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:51,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:51,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:51,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:51,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:49:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126433119] [2024-09-18 15:49:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126433119] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953165656] [2024-09-18 15:49:51,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:49:51,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:51,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:51,993 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:51,994 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-18 15:49:52,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:49:52,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:52,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 15:49:52,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:52,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:53,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953165656] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:53,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:53,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-18 15:49:53,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219274554] [2024-09-18 15:49:53,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:53,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-18 15:49:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-18 15:49:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-18 15:49:53,030 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:53,505 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2024-09-18 15:49:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:49:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-18 15:49:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:53,506 INFO L225 Difference]: With dead ends: 67 [2024-09-18 15:49:53,506 INFO L226 Difference]: Without dead ends: 56 [2024-09-18 15:49:53,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-18 15:49:53,507 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:53,507 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 43 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-18 15:49:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-18 15:49:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2024-09-18 15:49:53,517 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 40 [2024-09-18 15:49:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:53,517 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2024-09-18 15:49:53,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:53,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2024-09-18 15:49:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-18 15:49:53,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:53,518 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:53,530 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:53,718 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-18 15:49:53,718 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:53,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:53,719 INFO L85 PathProgramCache]: Analyzing trace with hash -119436570, now seen corresponding path program 9 times [2024-09-18 15:49:53,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:53,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995154157] [2024-09-18 15:49:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:53,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:53,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:53,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:53,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:49:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:54,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:54,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995154157] [2024-09-18 15:49:54,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995154157] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:54,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109134464] [2024-09-18 15:49:54,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:49:54,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:54,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:54,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:54,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-18 15:49:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:49:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:54,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 15:49:54,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:54,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:54,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109134464] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:54,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:54,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-18 15:49:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780202292] [2024-09-18 15:49:54,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:54,895 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-18 15:49:54,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:54,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-18 15:49:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-18 15:49:54,896 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:55,338 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-09-18 15:49:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:49:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-18 15:49:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:55,339 INFO L225 Difference]: With dead ends: 62 [2024-09-18 15:49:55,339 INFO L226 Difference]: Without dead ends: 53 [2024-09-18 15:49:55,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-18 15:49:55,340 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:55,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-18 15:49:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-18 15:49:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2024-09-18 15:49:55,351 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2024-09-18 15:49:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:55,351 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2024-09-18 15:49:55,351 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:55,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2024-09-18 15:49:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 15:49:55,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:55,352 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:55,367 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-18 15:49:55,553 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-18 15:49:55,553 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:55,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1635413724, now seen corresponding path program 10 times [2024-09-18 15:49:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:55,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525024599] [2024-09-18 15:49:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:55,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:55,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:55,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:49:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:55,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:55,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525024599] [2024-09-18 15:49:55,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525024599] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:55,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602504216] [2024-09-18 15:49:55,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:49:55,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:55,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:55,869 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:55,869 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-18 15:49:55,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:49:55,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:55,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-18 15:49:55,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:56,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:56,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602504216] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:56,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:56,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-18 15:49:56,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528458144] [2024-09-18 15:49:56,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:56,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-18 15:49:56,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:56,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-18 15:49:56,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-18 15:49:56,655 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:57,129 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2024-09-18 15:49:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:49:57,130 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-18 15:49:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:57,130 INFO L225 Difference]: With dead ends: 69 [2024-09-18 15:49:57,130 INFO L226 Difference]: Without dead ends: 59 [2024-09-18 15:49:57,131 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-18 15:49:57,132 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:57,132 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-18 15:49:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2024-09-18 15:49:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-18 15:49:57,142 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2024-09-18 15:49:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:57,142 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-18 15:49:57,142 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:57,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-18 15:49:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 15:49:57,143 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:57,143 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:57,156 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:57,343 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-18 15:49:57,343 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:57,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1227536155, now seen corresponding path program 10 times [2024-09-18 15:49:57,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:57,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800937082] [2024-09-18 15:49:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:57,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:57,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:57,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 15:49:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:57,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800937082] [2024-09-18 15:49:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800937082] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593339139] [2024-09-18 15:49:57,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:49:57,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:57,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:57,656 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:57,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-18 15:49:57,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:49:57,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:57,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-18 15:49:57,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:57,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:58,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593339139] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:58,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-18 15:49:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082319376] [2024-09-18 15:49:58,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:58,493 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-18 15:49:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-18 15:49:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-18 15:49:58,495 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:59,004 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2024-09-18 15:49:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:49:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-18 15:49:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:59,005 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:49:59,005 INFO L226 Difference]: Without dead ends: 51 [2024-09-18 15:49:59,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-18 15:49:59,006 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:59,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:49:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-18 15:49:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-18 15:49:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:49:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-09-18 15:49:59,023 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 41 [2024-09-18 15:49:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:59,024 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-09-18 15:49:59,024 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:49:59,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-09-18 15:49:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 15:49:59,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:59,025 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:59,039 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-18 15:49:59,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-18 15:49:59,225 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:59,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1744997279, now seen corresponding path program 11 times [2024-09-18 15:49:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243963039] [2024-09-18 15:49:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:59,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:59,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:49:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:59,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:49:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243963039] [2024-09-18 15:49:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243963039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885106647] [2024-09-18 15:49:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:49:59,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:59,590 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:59,591 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-18 15:49:59,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-18 15:49:59,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:59,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:49:59,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:59,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:00,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885106647] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:00,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:00,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-18 15:50:00,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268047184] [2024-09-18 15:50:00,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:00,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-18 15:50:00,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-18 15:50:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-18 15:50:00,542 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:01,053 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-09-18 15:50:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:50:01,054 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-18 15:50:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:01,054 INFO L225 Difference]: With dead ends: 69 [2024-09-18 15:50:01,054 INFO L226 Difference]: Without dead ends: 58 [2024-09-18 15:50:01,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-18 15:50:01,055 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:01,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-18 15:50:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-18 15:50:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-09-18 15:50:01,065 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 42 [2024-09-18 15:50:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:01,065 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-09-18 15:50:01,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:01,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-09-18 15:50:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 15:50:01,066 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:01,066 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:01,078 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:01,267 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-18 15:50:01,267 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:01,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2010460257, now seen corresponding path program 11 times [2024-09-18 15:50:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:01,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123720198] [2024-09-18 15:50:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:01,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:01,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:01,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:50:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:01,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123720198] [2024-09-18 15:50:01,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123720198] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:01,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695516061] [2024-09-18 15:50:01,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:50:01,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:01,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:01,659 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:01,659 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-18 15:50:01,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-18 15:50:01,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:01,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:50:01,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:02,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695516061] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:02,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:02,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-18 15:50:02,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795046057] [2024-09-18 15:50:02,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:02,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-18 15:50:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-18 15:50:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-18 15:50:02,556 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:03,094 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-09-18 15:50:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:50:03,095 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-18 15:50:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:03,095 INFO L225 Difference]: With dead ends: 64 [2024-09-18 15:50:03,095 INFO L226 Difference]: Without dead ends: 55 [2024-09-18 15:50:03,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-18 15:50:03,097 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:03,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-18 15:50:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-18 15:50:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-09-18 15:50:03,112 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2024-09-18 15:50:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:03,112 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-09-18 15:50:03,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:03,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-09-18 15:50:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:50:03,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:03,113 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:03,125 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:03,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-18 15:50:03,314 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:03,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1050813403, now seen corresponding path program 12 times [2024-09-18 15:50:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870872219] [2024-09-18 15:50:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:03,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:03,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:03,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:50:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:03,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870872219] [2024-09-18 15:50:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870872219] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005855213] [2024-09-18 15:50:03,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:50:03,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:03,685 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:03,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-18 15:50:03,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 15:50:03,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:03,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-18 15:50:03,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:04,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:04,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005855213] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:04,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:04,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-18 15:50:04,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126753694] [2024-09-18 15:50:04,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:04,518 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-18 15:50:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-18 15:50:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-18 15:50:04,520 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:05,124 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-09-18 15:50:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:50:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-18 15:50:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:05,125 INFO L225 Difference]: With dead ends: 71 [2024-09-18 15:50:05,125 INFO L226 Difference]: Without dead ends: 61 [2024-09-18 15:50:05,126 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-18 15:50:05,126 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:05,126 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 67 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-18 15:50:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-09-18 15:50:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-09-18 15:50:05,136 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2024-09-18 15:50:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:05,136 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-09-18 15:50:05,136 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:05,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-09-18 15:50:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:50:05,137 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:05,137 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:05,150 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-18 15:50:05,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:05,338 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:05,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1465138944, now seen corresponding path program 12 times [2024-09-18 15:50:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:05,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973479070] [2024-09-18 15:50:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:50:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:05,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973479070] [2024-09-18 15:50:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973479070] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694063890] [2024-09-18 15:50:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:50:05,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:05,700 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:05,701 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-18 15:50:05,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 15:50:05,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:05,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-18 15:50:05,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:06,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:06,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694063890] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:06,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:06,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-18 15:50:06,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006056670] [2024-09-18 15:50:06,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:06,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-18 15:50:06,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:06,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-18 15:50:06,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-18 15:50:06,594 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:07,118 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2024-09-18 15:50:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:50:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-18 15:50:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:07,119 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:50:07,119 INFO L226 Difference]: Without dead ends: 53 [2024-09-18 15:50:07,120 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-18 15:50:07,120 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:07,121 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-18 15:50:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-18 15:50:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-09-18 15:50:07,132 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2024-09-18 15:50:07,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:07,132 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-09-18 15:50:07,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:07,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-09-18 15:50:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 15:50:07,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:07,133 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:07,149 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:07,334 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:07,334 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:07,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash -76334966, now seen corresponding path program 13 times [2024-09-18 15:50:07,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:07,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076595390] [2024-09-18 15:50:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:07,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:07,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:07,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:07,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:50:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:07,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:07,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076595390] [2024-09-18 15:50:07,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076595390] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729277355] [2024-09-18 15:50:07,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:50:07,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:07,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:07,770 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:07,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-18 15:50:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:07,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:50:07,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:08,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:08,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729277355] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:08,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:08,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-18 15:50:08,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423904598] [2024-09-18 15:50:08,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:08,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-18 15:50:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-18 15:50:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:50:08,886 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:09,526 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2024-09-18 15:50:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:50:09,526 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-18 15:50:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:09,528 INFO L225 Difference]: With dead ends: 71 [2024-09-18 15:50:09,528 INFO L226 Difference]: Without dead ends: 60 [2024-09-18 15:50:09,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-18 15:50:09,532 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:09,532 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-18 15:50:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-09-18 15:50:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2024-09-18 15:50:09,544 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 44 [2024-09-18 15:50:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:09,544 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2024-09-18 15:50:09,544 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:09,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2024-09-18 15:50:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 15:50:09,545 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:09,545 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:09,562 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:09,746 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:09,746 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:09,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash -694353722, now seen corresponding path program 13 times [2024-09-18 15:50:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:09,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685008745] [2024-09-18 15:50:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:09,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:09,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:09,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:50:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:10,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:10,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685008745] [2024-09-18 15:50:10,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685008745] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:10,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465789146] [2024-09-18 15:50:10,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:50:10,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:10,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:10,160 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:10,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-18 15:50:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:10,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:50:10,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:10,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465789146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:11,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:11,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-18 15:50:11,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305471235] [2024-09-18 15:50:11,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:11,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-18 15:50:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:11,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-18 15:50:11,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:50:11,198 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:11,793 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-09-18 15:50:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:50:11,794 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-18 15:50:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:11,794 INFO L225 Difference]: With dead ends: 66 [2024-09-18 15:50:11,794 INFO L226 Difference]: Without dead ends: 57 [2024-09-18 15:50:11,795 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-18 15:50:11,795 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:11,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 52 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-18 15:50:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-18 15:50:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 47 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-09-18 15:50:11,806 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 44 [2024-09-18 15:50:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:11,806 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-09-18 15:50:11,806 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:11,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-09-18 15:50:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:50:11,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:11,807 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:11,820 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-18 15:50:12,007 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-18 15:50:12,007 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:12,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1951796860, now seen corresponding path program 14 times [2024-09-18 15:50:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:12,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620089249] [2024-09-18 15:50:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:12,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:12,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:12,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-18 15:50:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:12,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:12,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620089249] [2024-09-18 15:50:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620089249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:12,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016208159] [2024-09-18 15:50:12,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:50:12,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:12,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:12,382 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:12,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-18 15:50:12,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:50:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:12,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-18 15:50:12,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:12,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:13,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016208159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:13,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:13,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-18 15:50:13,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466606182] [2024-09-18 15:50:13,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:13,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-18 15:50:13,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-18 15:50:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-18 15:50:13,457 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:14,058 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-09-18 15:50:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:50:14,058 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-18 15:50:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:14,059 INFO L225 Difference]: With dead ends: 73 [2024-09-18 15:50:14,059 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 15:50:14,060 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3589 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-18 15:50:14,060 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:14,061 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 15:50:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-09-18 15:50:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-09-18 15:50:14,071 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 45 [2024-09-18 15:50:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:14,072 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-09-18 15:50:14,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:14,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-09-18 15:50:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:50:14,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:14,073 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:14,085 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-18 15:50:14,273 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-18 15:50:14,273 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:14,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 584973627, now seen corresponding path program 14 times [2024-09-18 15:50:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816264742] [2024-09-18 15:50:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:14,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:14,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:14,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:14,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:50:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:14,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816264742] [2024-09-18 15:50:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816264742] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796848598] [2024-09-18 15:50:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:50:14,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:14,633 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:14,634 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-18 15:50:14,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:50:14,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:14,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-18 15:50:14,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:15,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:15,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796848598] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:15,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:15,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-18 15:50:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055935114] [2024-09-18 15:50:15,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:15,617 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-18 15:50:15,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-18 15:50:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-18 15:50:15,618 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:16,219 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-09-18 15:50:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:50:16,219 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-18 15:50:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:16,220 INFO L225 Difference]: With dead ends: 67 [2024-09-18 15:50:16,220 INFO L226 Difference]: Without dead ends: 55 [2024-09-18 15:50:16,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-18 15:50:16,221 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:16,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 70 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-18 15:50:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-18 15:50:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-09-18 15:50:16,233 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 45 [2024-09-18 15:50:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:16,233 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-09-18 15:50:16,233 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:16,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-09-18 15:50:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 15:50:16,234 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:16,234 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:16,246 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:16,434 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-18 15:50:16,435 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:16,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1332027393, now seen corresponding path program 15 times [2024-09-18 15:50:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:16,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275230384] [2024-09-18 15:50:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:16,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:16,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:16,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-18 15:50:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:16,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:16,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275230384] [2024-09-18 15:50:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275230384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:16,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171710241] [2024-09-18 15:50:16,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:50:16,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:16,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:16,894 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:16,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-18 15:50:16,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:50:16,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:16,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-18 15:50:16,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:17,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171710241] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:18,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:18,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-18 15:50:18,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329779565] [2024-09-18 15:50:18,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:18,117 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-18 15:50:18,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:18,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-18 15:50:18,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-18 15:50:18,118 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:18,801 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2024-09-18 15:50:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:50:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-18 15:50:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:18,802 INFO L225 Difference]: With dead ends: 73 [2024-09-18 15:50:18,802 INFO L226 Difference]: Without dead ends: 62 [2024-09-18 15:50:18,803 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-18 15:50:18,803 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:18,804 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 52 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-18 15:50:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-09-18 15:50:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2024-09-18 15:50:18,817 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 46 [2024-09-18 15:50:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:18,817 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2024-09-18 15:50:18,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:18,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2024-09-18 15:50:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 15:50:18,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:18,818 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:18,835 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-18 15:50:19,019 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-18 15:50:19,019 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:19,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:19,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1719770239, now seen corresponding path program 15 times [2024-09-18 15:50:19,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:19,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772571448] [2024-09-18 15:50:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:19,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:19,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:19,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-18 15:50:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:19,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772571448] [2024-09-18 15:50:19,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772571448] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:19,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120905587] [2024-09-18 15:50:19,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:50:19,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:19,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:19,522 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:19,523 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-18 15:50:19,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:50:19,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:19,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-18 15:50:19,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:20,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120905587] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:21,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:21,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-18 15:50:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507273026] [2024-09-18 15:50:21,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:21,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-18 15:50:21,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-18 15:50:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-18 15:50:21,021 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:21,736 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-09-18 15:50:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:50:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-18 15:50:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:21,737 INFO L225 Difference]: With dead ends: 68 [2024-09-18 15:50:21,737 INFO L226 Difference]: Without dead ends: 59 [2024-09-18 15:50:21,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-18 15:50:21,739 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:21,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-18 15:50:21,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-18 15:50:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2024-09-18 15:50:21,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 46 [2024-09-18 15:50:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:21,750 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2024-09-18 15:50:21,750 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2024-09-18 15:50:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 15:50:21,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:21,751 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:21,763 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-18 15:50:21,951 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-18 15:50:21,951 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:21,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1395555717, now seen corresponding path program 16 times [2024-09-18 15:50:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:21,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106020322] [2024-09-18 15:50:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:22,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:22,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:22,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:50:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106020322] [2024-09-18 15:50:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106020322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460278193] [2024-09-18 15:50:22,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:50:22,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:22,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:22,381 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:22,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-18 15:50:22,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:50:22,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:22,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-18 15:50:22,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:22,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460278193] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:23,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:23,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-18 15:50:23,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274937535] [2024-09-18 15:50:23,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:23,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-18 15:50:23,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:23,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-18 15:50:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-18 15:50:23,499 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:24,137 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2024-09-18 15:50:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:50:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-18 15:50:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:24,138 INFO L225 Difference]: With dead ends: 75 [2024-09-18 15:50:24,138 INFO L226 Difference]: Without dead ends: 65 [2024-09-18 15:50:24,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-18 15:50:24,139 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:24,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-18 15:50:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2024-09-18 15:50:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-09-18 15:50:24,150 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 47 [2024-09-18 15:50:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:24,151 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-09-18 15:50:24,151 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:24,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-09-18 15:50:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 15:50:24,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:24,151 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:24,163 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-18 15:50:24,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-18 15:50:24,353 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:24,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1138167328, now seen corresponding path program 16 times [2024-09-18 15:50:24,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:24,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004323666] [2024-09-18 15:50:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:24,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:24,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:24,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:24,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-18 15:50:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004323666] [2024-09-18 15:50:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004323666] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733304737] [2024-09-18 15:50:24,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:50:24,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:24,792 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:24,793 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-18 15:50:24,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:50:24,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:24,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-18 15:50:24,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:25,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:25,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733304737] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:25,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:25,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-18 15:50:25,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473939488] [2024-09-18 15:50:25,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:25,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-18 15:50:25,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-18 15:50:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-18 15:50:25,966 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:26,558 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2024-09-18 15:50:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:50:26,558 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-18 15:50:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:26,559 INFO L225 Difference]: With dead ends: 69 [2024-09-18 15:50:26,559 INFO L226 Difference]: Without dead ends: 57 [2024-09-18 15:50:26,559 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-18 15:50:26,560 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:26,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-18 15:50:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-18 15:50:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-09-18 15:50:26,572 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2024-09-18 15:50:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:26,572 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-09-18 15:50:26,572 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:26,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-09-18 15:50:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 15:50:26,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:26,573 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:26,585 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-18 15:50:26,773 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-18 15:50:26,773 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:26,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1395633642, now seen corresponding path program 17 times [2024-09-18 15:50:26,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:26,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530351054] [2024-09-18 15:50:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:26,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:26,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:26,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:27,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:50:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:27,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530351054] [2024-09-18 15:50:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530351054] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63159871] [2024-09-18 15:50:27,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:50:27,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:27,205 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:27,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-18 15:50:27,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-18 15:50:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:27,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-18 15:50:27,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:27,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63159871] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:28,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:28,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-18 15:50:28,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94784811] [2024-09-18 15:50:28,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:28,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-18 15:50:28,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:28,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-18 15:50:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-18 15:50:28,559 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:29,241 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2024-09-18 15:50:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-18 15:50:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-18 15:50:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:29,242 INFO L225 Difference]: With dead ends: 75 [2024-09-18 15:50:29,242 INFO L226 Difference]: Without dead ends: 64 [2024-09-18 15:50:29,243 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-18 15:50:29,244 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:29,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-18 15:50:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-18 15:50:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-09-18 15:50:29,257 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 48 [2024-09-18 15:50:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:29,257 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-09-18 15:50:29,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:29,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-09-18 15:50:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 15:50:29,258 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:29,258 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:29,273 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-18 15:50:29,458 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-18 15:50:29,459 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:29,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:29,459 INFO L85 PathProgramCache]: Analyzing trace with hash 206102182, now seen corresponding path program 17 times [2024-09-18 15:50:29,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:29,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509499183] [2024-09-18 15:50:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:29,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:29,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:29,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:29,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:50:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509499183] [2024-09-18 15:50:29,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509499183] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839614700] [2024-09-18 15:50:29,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:50:29,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:29,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:29,989 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:29,990 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-18 15:50:30,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-18 15:50:30,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:30,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-18 15:50:30,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:30,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839614700] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:31,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:31,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-18 15:50:31,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579594143] [2024-09-18 15:50:31,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:31,330 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-18 15:50:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-18 15:50:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-18 15:50:31,331 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:31,994 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-09-18 15:50:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-18 15:50:31,995 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-18 15:50:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:31,995 INFO L225 Difference]: With dead ends: 70 [2024-09-18 15:50:31,995 INFO L226 Difference]: Without dead ends: 61 [2024-09-18 15:50:31,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5158 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-18 15:50:31,997 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:31,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-18 15:50:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-18 15:50:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-09-18 15:50:32,016 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 48 [2024-09-18 15:50:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:32,016 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-09-18 15:50:32,016 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:32,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-09-18 15:50:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-18 15:50:32,017 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:32,017 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:32,034 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:32,217 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:32,218 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:32,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 118315492, now seen corresponding path program 18 times [2024-09-18 15:50:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:32,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124711198] [2024-09-18 15:50:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:32,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:32,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:32,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:50:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:32,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:32,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124711198] [2024-09-18 15:50:32,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124711198] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:32,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690930122] [2024-09-18 15:50:32,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:50:32,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:32,631 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:32,632 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-18 15:50:32,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-18 15:50:32,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:32,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-18 15:50:32,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:33,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:33,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690930122] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:33,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:33,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-18 15:50:33,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50564543] [2024-09-18 15:50:33,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:33,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-18 15:50:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-18 15:50:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-18 15:50:33,883 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:34,540 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2024-09-18 15:50:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-18 15:50:34,541 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-18 15:50:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:34,542 INFO L225 Difference]: With dead ends: 77 [2024-09-18 15:50:34,542 INFO L226 Difference]: Without dead ends: 67 [2024-09-18 15:50:34,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-18 15:50:34,543 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:34,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 28 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-18 15:50:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2024-09-18 15:50:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-09-18 15:50:34,559 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 49 [2024-09-18 15:50:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:34,559 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-09-18 15:50:34,559 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:34,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-09-18 15:50:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-18 15:50:34,560 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:34,560 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:34,572 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-18 15:50:34,760 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:34,760 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:34,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1565664421, now seen corresponding path program 18 times [2024-09-18 15:50:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:34,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393482413] [2024-09-18 15:50:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:34,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:34,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:34,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:35,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:50:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:35,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393482413] [2024-09-18 15:50:35,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393482413] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501284126] [2024-09-18 15:50:35,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:50:35,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:35,251 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:35,251 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-18 15:50:35,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-18 15:50:35,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:35,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-18 15:50:35,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:35,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501284126] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:36,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-18 15:50:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868558151] [2024-09-18 15:50:36,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:36,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-18 15:50:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-18 15:50:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-18 15:50:36,510 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:37,180 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2024-09-18 15:50:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-18 15:50:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-18 15:50:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:37,181 INFO L225 Difference]: With dead ends: 71 [2024-09-18 15:50:37,181 INFO L226 Difference]: Without dead ends: 59 [2024-09-18 15:50:37,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-18 15:50:37,182 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:37,182 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-18 15:50:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-18 15:50:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2024-09-18 15:50:37,193 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2024-09-18 15:50:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:37,194 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2024-09-18 15:50:37,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:37,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2024-09-18 15:50:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-18 15:50:37,194 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:37,195 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:37,207 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:37,395 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:37,395 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:37,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:37,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1081000865, now seen corresponding path program 19 times [2024-09-18 15:50:37,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:37,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905721203] [2024-09-18 15:50:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:37,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:37,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:37,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:37,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:50:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:37,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:37,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905721203] [2024-09-18 15:50:37,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905721203] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:37,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778697061] [2024-09-18 15:50:37,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:50:37,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:37,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:37,865 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:37,866 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-18 15:50:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:37,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 15:50:37,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:38,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:39,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778697061] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:39,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:39,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-18 15:50:39,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119228655] [2024-09-18 15:50:39,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:39,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-18 15:50:39,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-18 15:50:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-18 15:50:39,361 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:40,186 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2024-09-18 15:50:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 15:50:40,186 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-18 15:50:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:40,187 INFO L225 Difference]: With dead ends: 77 [2024-09-18 15:50:40,187 INFO L226 Difference]: Without dead ends: 66 [2024-09-18 15:50:40,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6038 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-18 15:50:40,188 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:40,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 58 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-18 15:50:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2024-09-18 15:50:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2024-09-18 15:50:40,202 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 50 [2024-09-18 15:50:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:40,202 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2024-09-18 15:50:40,202 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:40,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2024-09-18 15:50:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-18 15:50:40,203 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:40,203 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:40,215 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:40,403 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-18 15:50:40,403 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:40,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1787145889, now seen corresponding path program 19 times [2024-09-18 15:50:40,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:40,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302701493] [2024-09-18 15:50:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:40,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:40,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:40,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:50:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:40,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302701493] [2024-09-18 15:50:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302701493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579388214] [2024-09-18 15:50:40,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:50:40,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:40,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:40,885 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:40,886 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-18 15:50:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:40,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 15:50:40,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:41,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:42,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579388214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:42,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:42,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-18 15:50:42,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681324106] [2024-09-18 15:50:42,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:42,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-18 15:50:42,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-18 15:50:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-18 15:50:42,339 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:43,147 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-09-18 15:50:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 15:50:43,148 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-18 15:50:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:43,149 INFO L225 Difference]: With dead ends: 72 [2024-09-18 15:50:43,149 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 15:50:43,150 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-18 15:50:43,150 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:43,150 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 67 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 15:50:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-18 15:50:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-09-18 15:50:43,163 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 50 [2024-09-18 15:50:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:43,164 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-09-18 15:50:43,164 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:43,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-09-18 15:50:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-18 15:50:43,164 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:43,165 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:43,181 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-18 15:50:43,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-18 15:50:43,365 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:43,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1938905371, now seen corresponding path program 20 times [2024-09-18 15:50:43,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:43,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329893428] [2024-09-18 15:50:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:43,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:43,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:43,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:43,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:50:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:43,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:43,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329893428] [2024-09-18 15:50:43,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329893428] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:43,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550176322] [2024-09-18 15:50:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:50:43,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:43,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:43,848 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:43,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-18 15:50:43,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:50:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:43,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-18 15:50:43,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:44,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:45,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550176322] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:45,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:45,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-18 15:50:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347337548] [2024-09-18 15:50:45,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:45,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-18 15:50:45,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-18 15:50:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-18 15:50:45,340 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:46,066 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-09-18 15:50:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 15:50:46,066 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-18 15:50:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:46,067 INFO L225 Difference]: With dead ends: 79 [2024-09-18 15:50:46,067 INFO L226 Difference]: Without dead ends: 69 [2024-09-18 15:50:46,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5974 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-18 15:50:46,070 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:46,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-18 15:50:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-09-18 15:50:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-09-18 15:50:46,087 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 51 [2024-09-18 15:50:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:46,087 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-09-18 15:50:46,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:46,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-09-18 15:50:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-18 15:50:46,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:46,088 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:46,100 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:46,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:46,288 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:46,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:46,289 INFO L85 PathProgramCache]: Analyzing trace with hash 202050240, now seen corresponding path program 20 times [2024-09-18 15:50:46,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:46,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467940130] [2024-09-18 15:50:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:46,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:46,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:46,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:46,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-18 15:50:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:46,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:46,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467940130] [2024-09-18 15:50:46,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467940130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:46,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563184326] [2024-09-18 15:50:46,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:50:46,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:46,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:46,706 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:46,707 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-18 15:50:46,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:50:46,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:46,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-18 15:50:46,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:47,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:48,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563184326] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:48,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-18 15:50:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253353775] [2024-09-18 15:50:48,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:48,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-18 15:50:48,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-18 15:50:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-18 15:50:48,160 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:48,874 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2024-09-18 15:50:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 15:50:48,874 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-18 15:50:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:48,875 INFO L225 Difference]: With dead ends: 73 [2024-09-18 15:50:48,875 INFO L226 Difference]: Without dead ends: 61 [2024-09-18 15:50:48,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-18 15:50:48,877 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:48,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-18 15:50:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-18 15:50:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2024-09-18 15:50:48,908 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 51 [2024-09-18 15:50:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:48,908 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2024-09-18 15:50:48,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:48,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2024-09-18 15:50:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-18 15:50:48,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:48,909 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:48,926 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-18 15:50:49,110 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:49,110 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:49,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1684712266, now seen corresponding path program 21 times [2024-09-18 15:50:49,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:49,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425435001] [2024-09-18 15:50:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:49,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:49,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:49,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:49,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:50:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:49,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425435001] [2024-09-18 15:50:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425435001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690835988] [2024-09-18 15:50:49,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:50:49,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:49,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:49,630 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:49,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-18 15:50:49,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-18 15:50:49,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:49,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 15:50:49,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:50,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:51,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690835988] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:51,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:51,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-18 15:50:51,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141821666] [2024-09-18 15:50:51,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:51,362 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-18 15:50:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-18 15:50:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-18 15:50:51,363 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:52,259 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2024-09-18 15:50:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-18 15:50:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-18 15:50:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:52,260 INFO L225 Difference]: With dead ends: 79 [2024-09-18 15:50:52,260 INFO L226 Difference]: Without dead ends: 68 [2024-09-18 15:50:52,261 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6906 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-18 15:50:52,262 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:52,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 58 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-18 15:50:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-09-18 15:50:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-09-18 15:50:52,280 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 52 [2024-09-18 15:50:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:52,280 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-09-18 15:50:52,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:52,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-09-18 15:50:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-18 15:50:52,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:52,281 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:52,296 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-18 15:50:52,481 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-18 15:50:52,481 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:52,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:52,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1027286150, now seen corresponding path program 21 times [2024-09-18 15:50:52,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322215116] [2024-09-18 15:50:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:52,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:52,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:52,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:52,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:50:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322215116] [2024-09-18 15:50:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322215116] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050270447] [2024-09-18 15:50:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:50:53,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:53,042 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:53,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-18 15:50:53,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-18 15:50:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:53,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 15:50:53,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:53,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:54,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050270447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:54,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:54,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-18 15:50:54,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102870760] [2024-09-18 15:50:54,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:54,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-18 15:50:54,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-18 15:50:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-18 15:50:54,675 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:55,468 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-09-18 15:50:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-18 15:50:55,468 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-18 15:50:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:55,469 INFO L225 Difference]: With dead ends: 74 [2024-09-18 15:50:55,469 INFO L226 Difference]: Without dead ends: 65 [2024-09-18 15:50:55,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-18 15:50:55,471 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:55,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:50:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-18 15:50:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-18 15:50:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-09-18 15:50:55,489 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 52 [2024-09-18 15:50:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:55,489 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-09-18 15:50:55,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:55,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-09-18 15:50:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-18 15:50:55,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:55,490 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:55,504 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:55,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-18 15:50:55,691 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:55,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1497221700, now seen corresponding path program 22 times [2024-09-18 15:50:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290676337] [2024-09-18 15:50:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:55,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:55,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:55,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:50:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:56,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:56,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290676337] [2024-09-18 15:50:56,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290676337] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:56,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775353273] [2024-09-18 15:50:56,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:50:56,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:56,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:56,205 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:56,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-18 15:50:56,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:50:56,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:56,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-18 15:50:56,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:56,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:50:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:57,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775353273] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:50:57,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:50:57,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-18 15:50:57,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065105783] [2024-09-18 15:50:57,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:50:57,720 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-18 15:50:57,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:50:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-18 15:50:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-18 15:50:57,721 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:58,542 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-09-18 15:50:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-18 15:50:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-18 15:50:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:58,543 INFO L225 Difference]: With dead ends: 81 [2024-09-18 15:50:58,543 INFO L226 Difference]: Without dead ends: 71 [2024-09-18 15:50:58,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-18 15:50:58,545 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:50:58,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:50:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-18 15:50:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2024-09-18 15:50:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:50:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-09-18 15:50:58,558 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2024-09-18 15:50:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:58,558 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-09-18 15:50:58,558 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:50:58,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-09-18 15:50:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-18 15:50:58,559 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:58,559 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:58,575 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:58,759 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-18 15:50:58,759 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:58,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1878765189, now seen corresponding path program 22 times [2024-09-18 15:50:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:58,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140830955] [2024-09-18 15:50:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:58,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:58,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:58,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:50:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:59,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:50:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:59,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:59,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140830955] [2024-09-18 15:50:59,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140830955] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:59,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129757828] [2024-09-18 15:50:59,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:50:59,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:59,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:59,259 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:50:59,260 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-18 15:50:59,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:50:59,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:59,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-18 15:50:59,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:50:59,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:00,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129757828] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:00,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:00,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-18 15:51:00,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480046998] [2024-09-18 15:51:00,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:00,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-18 15:51:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-18 15:51:00,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-18 15:51:00,882 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:01,646 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2024-09-18 15:51:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-18 15:51:01,647 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-18 15:51:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:01,648 INFO L225 Difference]: With dead ends: 75 [2024-09-18 15:51:01,648 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 15:51:01,648 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6939 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-18 15:51:01,649 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:01,649 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:51:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 15:51:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-18 15:51:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-09-18 15:51:01,663 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 53 [2024-09-18 15:51:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:01,663 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-09-18 15:51:01,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:01,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-09-18 15:51:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 15:51:01,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:01,664 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:01,677 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-18 15:51:01,865 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:01,865 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:01,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash 877420353, now seen corresponding path program 23 times [2024-09-18 15:51:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:01,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166716988] [2024-09-18 15:51:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:01,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:01,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:01,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:02,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:51:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:02,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:02,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166716988] [2024-09-18 15:51:02,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166716988] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:02,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073102518] [2024-09-18 15:51:02,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:51:02,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:02,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:02,380 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:02,381 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-18 15:51:02,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-18 15:51:02,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:02,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 15:51:02,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:03,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:04,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073102518] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:04,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:04,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-18 15:51:04,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214185876] [2024-09-18 15:51:04,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:04,238 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-18 15:51:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:04,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-18 15:51:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-18 15:51:04,240 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:05,118 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-09-18 15:51:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-18 15:51:05,119 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-18 15:51:05,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:05,120 INFO L225 Difference]: With dead ends: 81 [2024-09-18 15:51:05,120 INFO L226 Difference]: Without dead ends: 70 [2024-09-18 15:51:05,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7975 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-18 15:51:05,122 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:05,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 46 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:51:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-18 15:51:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-09-18 15:51:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2024-09-18 15:51:05,136 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 54 [2024-09-18 15:51:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:05,137 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2024-09-18 15:51:05,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:05,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2024-09-18 15:51:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-18 15:51:05,137 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:05,137 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:05,150 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-09-18 15:51:05,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:05,338 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:05,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash 898961857, now seen corresponding path program 23 times [2024-09-18 15:51:05,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:05,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329007578] [2024-09-18 15:51:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:05,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:05,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:05,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:05,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:51:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:05,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:05,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329007578] [2024-09-18 15:51:05,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329007578] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:05,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134257812] [2024-09-18 15:51:05,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:51:05,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:05,928 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:05,929 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-18 15:51:06,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-18 15:51:06,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:06,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 15:51:06,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:06,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:07,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134257812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:07,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:07,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-18 15:51:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627807086] [2024-09-18 15:51:07,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:07,727 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-18 15:51:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-18 15:51:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-18 15:51:07,729 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:08,644 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2024-09-18 15:51:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-18 15:51:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-18 15:51:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:08,645 INFO L225 Difference]: With dead ends: 76 [2024-09-18 15:51:08,645 INFO L226 Difference]: Without dead ends: 67 [2024-09-18 15:51:08,646 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7931 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-18 15:51:08,647 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:08,647 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 55 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-18 15:51:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-18 15:51:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-09-18 15:51:08,662 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 54 [2024-09-18 15:51:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:08,662 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-09-18 15:51:08,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:08,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-09-18 15:51:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-18 15:51:08,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:08,663 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:08,676 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-18 15:51:08,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:08,863 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:08,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:08,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1087612859, now seen corresponding path program 24 times [2024-09-18 15:51:08,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:08,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442089061] [2024-09-18 15:51:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:08,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:08,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:09,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:51:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:09,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:09,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442089061] [2024-09-18 15:51:09,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442089061] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:09,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450658015] [2024-09-18 15:51:09,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:51:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:09,471 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:09,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-18 15:51:09,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-18 15:51:09,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:09,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-18 15:51:09,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:10,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:11,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450658015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:11,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:11,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-18 15:51:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143610235] [2024-09-18 15:51:11,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:11,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-18 15:51:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-18 15:51:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-18 15:51:11,158 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:12,065 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-09-18 15:51:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-18 15:51:12,065 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-18 15:51:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:12,066 INFO L225 Difference]: With dead ends: 83 [2024-09-18 15:51:12,066 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 15:51:12,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7899 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-18 15:51:12,067 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:12,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 58 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 15:51:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2024-09-18 15:51:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-09-18 15:51:12,086 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2024-09-18 15:51:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:12,087 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-09-18 15:51:12,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:12,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-09-18 15:51:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-18 15:51:12,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:12,088 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:12,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-09-18 15:51:12,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-09-18 15:51:12,288 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:12,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1561850976, now seen corresponding path program 24 times [2024-09-18 15:51:12,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:12,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873793337] [2024-09-18 15:51:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:12,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:12,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:12,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:12,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:51:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:12,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:12,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873793337] [2024-09-18 15:51:12,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873793337] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:12,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400902499] [2024-09-18 15:51:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:51:12,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:12,789 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:12,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-18 15:51:12,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-18 15:51:12,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:12,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-18 15:51:12,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:13,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:14,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400902499] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:14,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:14,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-18 15:51:14,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819531103] [2024-09-18 15:51:14,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:14,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-18 15:51:14,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-18 15:51:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-18 15:51:14,547 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:15,435 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2024-09-18 15:51:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-18 15:51:15,435 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-18 15:51:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:15,436 INFO L225 Difference]: With dead ends: 77 [2024-09-18 15:51:15,436 INFO L226 Difference]: Without dead ends: 65 [2024-09-18 15:51:15,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7864 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-18 15:51:15,438 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:15,438 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-18 15:51:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-18 15:51:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 55 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-09-18 15:51:15,457 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 55 [2024-09-18 15:51:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:15,457 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-09-18 15:51:15,457 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:15,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-09-18 15:51:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-18 15:51:15,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:15,457 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:15,470 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-09-18 15:51:15,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-09-18 15:51:15,658 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:15,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1064448170, now seen corresponding path program 25 times [2024-09-18 15:51:15,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:15,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435211140] [2024-09-18 15:51:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:15,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:15,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:15,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:51:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:16,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435211140] [2024-09-18 15:51:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435211140] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033073887] [2024-09-18 15:51:16,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:51:16,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:16,279 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:16,281 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-18 15:51:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:16,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-18 15:51:16,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:17,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033073887] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:18,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:18,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-18 15:51:18,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356985593] [2024-09-18 15:51:18,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:18,357 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-18 15:51:18,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-18 15:51:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-18 15:51:18,359 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:19,301 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2024-09-18 15:51:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 15:51:19,301 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-18 15:51:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:19,302 INFO L225 Difference]: With dead ends: 83 [2024-09-18 15:51:19,302 INFO L226 Difference]: Without dead ends: 72 [2024-09-18 15:51:19,303 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8967 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-18 15:51:19,304 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:19,304 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:51:19,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-18 15:51:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-09-18 15:51:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-09-18 15:51:19,317 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 56 [2024-09-18 15:51:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:19,317 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-09-18 15:51:19,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:19,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-09-18 15:51:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-18 15:51:19,318 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:19,318 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:19,335 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-09-18 15:51:19,519 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:19,519 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:19,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash 659149414, now seen corresponding path program 25 times [2024-09-18 15:51:19,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:19,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466950012] [2024-09-18 15:51:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:19,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:19,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:19,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:19,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:51:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466950012] [2024-09-18 15:51:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466950012] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328656166] [2024-09-18 15:51:20,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:51:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:20,172 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:20,173 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-18 15:51:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:20,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-18 15:51:20,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:20,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328656166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:22,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:22,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-18 15:51:22,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75082111] [2024-09-18 15:51:22,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:22,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-18 15:51:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-18 15:51:22,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-18 15:51:22,193 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:23,154 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2024-09-18 15:51:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 15:51:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-18 15:51:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:23,155 INFO L225 Difference]: With dead ends: 78 [2024-09-18 15:51:23,155 INFO L226 Difference]: Without dead ends: 69 [2024-09-18 15:51:23,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9028 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-18 15:51:23,157 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:23,157 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 55 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-18 15:51:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-18 15:51:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-09-18 15:51:23,171 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 56 [2024-09-18 15:51:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:23,171 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-09-18 15:51:23,172 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:23,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-09-18 15:51:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 15:51:23,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:23,172 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:23,185 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-09-18 15:51:23,372 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:23,373 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:23,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1195983524, now seen corresponding path program 26 times [2024-09-18 15:51:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599192091] [2024-09-18 15:51:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:23,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:23,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:23,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:23,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-18 15:51:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:23,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:24,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599192091] [2024-09-18 15:51:24,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599192091] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:24,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163884775] [2024-09-18 15:51:24,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:51:24,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:24,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:24,001 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:24,002 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-18 15:51:24,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:51:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:24,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:51:24,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:24,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:25,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163884775] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:25,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:25,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-18 15:51:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627416150] [2024-09-18 15:51:25,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:25,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-18 15:51:25,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-18 15:51:25,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-18 15:51:25,952 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:26,887 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2024-09-18 15:51:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 15:51:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-18 15:51:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:26,888 INFO L225 Difference]: With dead ends: 85 [2024-09-18 15:51:26,888 INFO L226 Difference]: Without dead ends: 75 [2024-09-18 15:51:26,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8930 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-18 15:51:26,889 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:26,889 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-18 15:51:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2024-09-18 15:51:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-09-18 15:51:26,911 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 57 [2024-09-18 15:51:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:26,912 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-09-18 15:51:26,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:26,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-09-18 15:51:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 15:51:26,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:26,913 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:26,930 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-09-18 15:51:27,113 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-18 15:51:27,114 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:27,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash -406102117, now seen corresponding path program 26 times [2024-09-18 15:51:27,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:27,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678625843] [2024-09-18 15:51:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:27,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:27,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:27,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:27,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-18 15:51:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:27,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678625843] [2024-09-18 15:51:27,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678625843] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473975401] [2024-09-18 15:51:27,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:51:27,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:27,645 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:27,646 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-18 15:51:27,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:51:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:27,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:51:27,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:28,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473975401] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:29,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:29,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-18 15:51:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638427110] [2024-09-18 15:51:29,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:29,598 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-18 15:51:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-18 15:51:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-18 15:51:29,600 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:30,526 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2024-09-18 15:51:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 15:51:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-18 15:51:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:30,527 INFO L225 Difference]: With dead ends: 79 [2024-09-18 15:51:30,527 INFO L226 Difference]: Without dead ends: 67 [2024-09-18 15:51:30,528 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8925 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-18 15:51:30,528 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:30,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:51:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-18 15:51:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-18 15:51:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2024-09-18 15:51:30,542 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2024-09-18 15:51:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:30,542 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2024-09-18 15:51:30,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:30,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2024-09-18 15:51:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 15:51:30,543 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:30,543 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:30,559 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-09-18 15:51:30,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-18 15:51:30,744 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:30,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash 128971489, now seen corresponding path program 27 times [2024-09-18 15:51:30,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:30,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572236691] [2024-09-18 15:51:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:30,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:30,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:30,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:31,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-18 15:51:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:31,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572236691] [2024-09-18 15:51:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572236691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:31,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414249397] [2024-09-18 15:51:31,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:51:31,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:31,342 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:31,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-18 15:51:31,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-18 15:51:31,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:31,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:51:31,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:32,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414249397] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:33,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-18 15:51:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197772816] [2024-09-18 15:51:33,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:33,576 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-18 15:51:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-18 15:51:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-18 15:51:33,579 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:34,637 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-09-18 15:51:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-18 15:51:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-18 15:51:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:34,639 INFO L225 Difference]: With dead ends: 85 [2024-09-18 15:51:34,639 INFO L226 Difference]: Without dead ends: 74 [2024-09-18 15:51:34,640 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10180 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-18 15:51:34,640 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:34,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 37 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:51:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-18 15:51:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2024-09-18 15:51:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-09-18 15:51:34,656 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 58 [2024-09-18 15:51:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:34,656 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-09-18 15:51:34,656 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:34,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-09-18 15:51:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 15:51:34,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:34,657 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:34,669 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-09-18 15:51:34,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-18 15:51:34,857 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:34,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash -623473439, now seen corresponding path program 27 times [2024-09-18 15:51:34,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:34,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040546268] [2024-09-18 15:51:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:34,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:34,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:34,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:35,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-18 15:51:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040546268] [2024-09-18 15:51:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040546268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955939566] [2024-09-18 15:51:35,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:51:35,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:35,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:35,587 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:35,588 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-18 15:51:35,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-18 15:51:35,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:35,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:51:35,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:36,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:37,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955939566] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:37,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:37,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-18 15:51:37,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802720484] [2024-09-18 15:51:37,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:37,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-18 15:51:37,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:37,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-18 15:51:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-18 15:51:37,743 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:38,789 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2024-09-18 15:51:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-18 15:51:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-18 15:51:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:38,790 INFO L225 Difference]: With dead ends: 80 [2024-09-18 15:51:38,791 INFO L226 Difference]: Without dead ends: 71 [2024-09-18 15:51:38,792 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10163 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-18 15:51:38,792 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:38,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-18 15:51:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-18 15:51:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 61 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2024-09-18 15:51:38,808 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 58 [2024-09-18 15:51:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:38,808 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2024-09-18 15:51:38,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:38,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2024-09-18 15:51:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-18 15:51:38,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:38,809 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:38,822 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-09-18 15:51:39,009 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-18 15:51:39,010 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:39,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:39,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1980395099, now seen corresponding path program 28 times [2024-09-18 15:51:39,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:39,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131701791] [2024-09-18 15:51:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:39,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:39,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:39,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:39,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:51:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:39,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:39,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131701791] [2024-09-18 15:51:39,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131701791] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:39,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330954893] [2024-09-18 15:51:39,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:51:39,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:39,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:39,747 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:39,749 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-18 15:51:39,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:51:39,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:39,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-18 15:51:39,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:40,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330954893] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:41,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:41,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-18 15:51:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230551918] [2024-09-18 15:51:41,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:41,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-18 15:51:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-18 15:51:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-18 15:51:41,791 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:42,792 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2024-09-18 15:51:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-18 15:51:42,793 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-18 15:51:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:42,793 INFO L225 Difference]: With dead ends: 87 [2024-09-18 15:51:42,793 INFO L226 Difference]: Without dead ends: 77 [2024-09-18 15:51:42,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10092 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-18 15:51:42,795 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:42,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-18 15:51:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-09-18 15:51:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-09-18 15:51:42,812 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 59 [2024-09-18 15:51:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:42,812 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-09-18 15:51:42,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:42,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-09-18 15:51:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-18 15:51:42,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:42,813 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:42,828 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-09-18 15:51:43,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:43,013 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:43,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1512704896, now seen corresponding path program 28 times [2024-09-18 15:51:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:43,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516318707] [2024-09-18 15:51:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:43,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:43,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:43,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:43,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-18 15:51:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516318707] [2024-09-18 15:51:43,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516318707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496827838] [2024-09-18 15:51:43,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:51:43,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:43,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:43,598 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:43,599 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-18 15:51:43,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:51:43,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:43,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-18 15:51:43,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:44,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:45,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496827838] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:45,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:45,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-18 15:51:45,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27038833] [2024-09-18 15:51:45,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:45,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-18 15:51:45,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:45,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-18 15:51:45,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-18 15:51:45,687 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:46,612 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2024-09-18 15:51:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-18 15:51:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-18 15:51:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:46,614 INFO L225 Difference]: With dead ends: 81 [2024-09-18 15:51:46,614 INFO L226 Difference]: Without dead ends: 69 [2024-09-18 15:51:46,615 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10053 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-18 15:51:46,615 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:46,615 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 37 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:51:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-18 15:51:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-18 15:51:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 59 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-09-18 15:51:46,630 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 59 [2024-09-18 15:51:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:46,630 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-09-18 15:51:46,630 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:46,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-09-18 15:51:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-18 15:51:46,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:46,631 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:46,643 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-18 15:51:46,831 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:46,831 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:46,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1324073462, now seen corresponding path program 29 times [2024-09-18 15:51:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:46,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206305841] [2024-09-18 15:51:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:46,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:46,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:47,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:51:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:47,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:47,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206305841] [2024-09-18 15:51:47,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206305841] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:47,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694269646] [2024-09-18 15:51:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:51:47,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:47,442 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:47,443 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-18 15:51:47,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-18 15:51:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:47,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-18 15:51:47,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:48,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:49,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694269646] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:49,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:49,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-18 15:51:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969131993] [2024-09-18 15:51:49,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:49,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-18 15:51:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-18 15:51:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-18 15:51:49,844 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:50,973 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-09-18 15:51:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-18 15:51:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-18 15:51:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:50,974 INFO L225 Difference]: With dead ends: 87 [2024-09-18 15:51:50,974 INFO L226 Difference]: Without dead ends: 76 [2024-09-18 15:51:50,976 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-18 15:51:50,976 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:50,976 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-18 15:51:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2024-09-18 15:51:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2024-09-18 15:51:50,994 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 60 [2024-09-18 15:51:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:50,994 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2024-09-18 15:51:50,994 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:50,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2024-09-18 15:51:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-18 15:51:50,995 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:50,995 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:51,007 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-18 15:51:51,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:51,196 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:51,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 46852166, now seen corresponding path program 29 times [2024-09-18 15:51:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046318992] [2024-09-18 15:51:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:51,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:51,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:51,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:51:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046318992] [2024-09-18 15:51:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046318992] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684619741] [2024-09-18 15:51:52,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:51:52,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:52,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:52,041 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:52,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-18 15:51:52,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-18 15:51:52,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:52,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-18 15:51:52,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:52,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684619741] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:54,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:54,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-18 15:51:54,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868867437] [2024-09-18 15:51:54,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:54,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-18 15:51:54,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-18 15:51:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-18 15:51:54,392 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:55,466 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2024-09-18 15:51:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-18 15:51:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-18 15:51:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:55,467 INFO L225 Difference]: With dead ends: 82 [2024-09-18 15:51:55,467 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 15:51:55,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11330 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-18 15:51:55,469 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:55,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 49 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:51:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 15:51:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-18 15:51:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.098360655737705) internal successors, (67), 63 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2024-09-18 15:51:55,489 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 60 [2024-09-18 15:51:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:55,490 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2024-09-18 15:51:55,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:55,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2024-09-18 15:51:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-18 15:51:55,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:55,490 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:55,503 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-09-18 15:51:55,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-09-18 15:51:55,691 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:55,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash -222444796, now seen corresponding path program 30 times [2024-09-18 15:51:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:55,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612413165] [2024-09-18 15:51:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:51:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:55,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:55,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:51:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:56,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:51:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:56,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:56,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612413165] [2024-09-18 15:51:56,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612413165] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:56,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316695531] [2024-09-18 15:51:56,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:51:56,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:56,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:56,427 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:56,428 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-18 15:51:56,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-18 15:51:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:56,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:51:56,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:51:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:57,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:58,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316695531] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:58,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:58,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-18 15:51:58,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288442805] [2024-09-18 15:51:58,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:58,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-18 15:51:58,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:58,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-18 15:51:58,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-18 15:51:58,643 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:51:59,771 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2024-09-18 15:51:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-18 15:51:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-18 15:51:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:51:59,772 INFO L225 Difference]: With dead ends: 89 [2024-09-18 15:51:59,772 INFO L226 Difference]: Without dead ends: 79 [2024-09-18 15:51:59,773 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-18 15:51:59,774 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:51:59,774 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 58 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:51:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-18 15:51:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2024-09-18 15:51:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 62 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:51:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2024-09-18 15:51:59,791 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2024-09-18 15:51:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:51:59,791 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2024-09-18 15:51:59,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:51:59,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2024-09-18 15:51:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-18 15:51:59,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:51:59,792 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:51:59,810 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-09-18 15:51:59,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:59,996 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:51:59,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:51:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2087519675, now seen corresponding path program 30 times [2024-09-18 15:51:59,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:51:59,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420965418] [2024-09-18 15:51:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:51:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:00,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:00,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:00,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-18 15:52:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:00,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:00,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420965418] [2024-09-18 15:52:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420965418] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:00,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612462397] [2024-09-18 15:52:00,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:52:00,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:00,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:00,636 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:00,637 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-18 15:52:00,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-18 15:52:00,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:00,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:52:00,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:01,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612462397] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:02,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:02,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-18 15:52:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222863543] [2024-09-18 15:52:02,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:02,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-18 15:52:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-18 15:52:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-18 15:52:02,978 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:04,053 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2024-09-18 15:52:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-18 15:52:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-18 15:52:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:04,054 INFO L225 Difference]: With dead ends: 83 [2024-09-18 15:52:04,054 INFO L226 Difference]: Without dead ends: 71 [2024-09-18 15:52:04,064 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11248 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-18 15:52:04,064 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:04,064 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-18 15:52:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-18 15:52:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 61 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2024-09-18 15:52:04,087 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 61 [2024-09-18 15:52:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:04,087 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2024-09-18 15:52:04,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:04,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:04,087 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2024-09-18 15:52:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 15:52:04,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:04,088 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:04,105 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-09-18 15:52:04,292 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:04,292 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:04,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash -892633471, now seen corresponding path program 31 times [2024-09-18 15:52:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:04,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316566358] [2024-09-18 15:52:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:04,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:04,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:04,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:52:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316566358] [2024-09-18 15:52:04,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316566358] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197874548] [2024-09-18 15:52:04,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:52:04,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:04,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:04,987 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:04,988 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-18 15:52:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:05,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-18 15:52:05,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:06,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:07,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197874548] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:07,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:07,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-18 15:52:07,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044386355] [2024-09-18 15:52:07,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:07,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-18 15:52:07,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-18 15:52:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-18 15:52:07,657 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:08,913 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2024-09-18 15:52:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-18 15:52:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-18 15:52:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:08,914 INFO L225 Difference]: With dead ends: 89 [2024-09-18 15:52:08,914 INFO L226 Difference]: Without dead ends: 78 [2024-09-18 15:52:08,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12561 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-18 15:52:08,916 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:08,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-18 15:52:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-09-18 15:52:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2024-09-18 15:52:08,937 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 62 [2024-09-18 15:52:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:08,937 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2024-09-18 15:52:08,937 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:08,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2024-09-18 15:52:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 15:52:08,938 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:08,938 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:08,950 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:09,138 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-18 15:52:09,138 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:09,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1878269953, now seen corresponding path program 31 times [2024-09-18 15:52:09,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:09,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455508121] [2024-09-18 15:52:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:09,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:09,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:09,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:09,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:52:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455508121] [2024-09-18 15:52:09,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455508121] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397110839] [2024-09-18 15:52:09,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:52:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:09,965 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:09,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-18 15:52:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:10,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-18 15:52:10,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:10,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397110839] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:12,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-18 15:52:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364432218] [2024-09-18 15:52:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:12,490 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-18 15:52:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-18 15:52:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-18 15:52:12,493 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:13,699 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2024-09-18 15:52:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-18 15:52:13,699 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-18 15:52:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:13,700 INFO L225 Difference]: With dead ends: 84 [2024-09-18 15:52:13,700 INFO L226 Difference]: Without dead ends: 75 [2024-09-18 15:52:13,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12597 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-18 15:52:13,702 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:13,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-18 15:52:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-18 15:52:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2024-09-18 15:52:13,729 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 62 [2024-09-18 15:52:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:13,729 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2024-09-18 15:52:13,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:13,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2024-09-18 15:52:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-18 15:52:13,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:13,730 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:13,748 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:13,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:13,931 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:13,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:13,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1210559739, now seen corresponding path program 32 times [2024-09-18 15:52:13,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:13,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288873447] [2024-09-18 15:52:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:13,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:14,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:14,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:14,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:52:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:14,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:14,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288873447] [2024-09-18 15:52:14,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288873447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:14,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257441003] [2024-09-18 15:52:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:52:14,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:14,709 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:14,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-18 15:52:14,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:52:14,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:14,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-18 15:52:14,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:15,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257441003] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:17,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-18 15:52:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326454100] [2024-09-18 15:52:17,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:17,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-18 15:52:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-18 15:52:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-18 15:52:17,123 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:18,321 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2024-09-18 15:52:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-18 15:52:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-18 15:52:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:18,322 INFO L225 Difference]: With dead ends: 91 [2024-09-18 15:52:18,322 INFO L226 Difference]: Without dead ends: 81 [2024-09-18 15:52:18,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12553 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-18 15:52:18,325 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:18,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 55 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-18 15:52:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-09-18 15:52:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-09-18 15:52:18,342 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2024-09-18 15:52:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:18,342 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-09-18 15:52:18,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:18,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-09-18 15:52:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-18 15:52:18,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:18,343 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:18,355 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:18,543 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:18,544 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:18,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1268071072, now seen corresponding path program 32 times [2024-09-18 15:52:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664953985] [2024-09-18 15:52:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:18,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:18,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:18,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:52:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664953985] [2024-09-18 15:52:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664953985] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970212563] [2024-09-18 15:52:19,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:52:19,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:19,235 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:19,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-18 15:52:19,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:52:19,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:19,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-18 15:52:19,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:20,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:21,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970212563] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:21,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:21,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-18 15:52:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989025399] [2024-09-18 15:52:21,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:21,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-18 15:52:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-18 15:52:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-18 15:52:21,787 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:22,835 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2024-09-18 15:52:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-18 15:52:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-18 15:52:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:22,837 INFO L225 Difference]: With dead ends: 85 [2024-09-18 15:52:22,837 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 15:52:22,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12604 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-18 15:52:22,839 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:22,839 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 31 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:52:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 15:52:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-18 15:52:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-09-18 15:52:22,856 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 63 [2024-09-18 15:52:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:22,856 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-09-18 15:52:22,856 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:22,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-09-18 15:52:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-18 15:52:22,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:22,857 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:22,869 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:23,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:23,057 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:23,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:23,057 INFO L85 PathProgramCache]: Analyzing trace with hash 580834154, now seen corresponding path program 33 times [2024-09-18 15:52:23,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:23,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314599692] [2024-09-18 15:52:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:23,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:23,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:23,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:23,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:52:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:23,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:23,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314599692] [2024-09-18 15:52:23,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314599692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:23,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326975859] [2024-09-18 15:52:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:52:23,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:23,786 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:23,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-18 15:52:24,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-18 15:52:24,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:24,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 15:52:24,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:24,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326975859] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:26,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:26,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-18 15:52:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946584668] [2024-09-18 15:52:26,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:26,613 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-18 15:52:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-18 15:52:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-18 15:52:26,615 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:27,795 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-09-18 15:52:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-18 15:52:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-18 15:52:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:27,796 INFO L225 Difference]: With dead ends: 91 [2024-09-18 15:52:27,796 INFO L226 Difference]: Without dead ends: 80 [2024-09-18 15:52:27,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13893 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-18 15:52:27,798 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:27,798 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:52:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-18 15:52:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2024-09-18 15:52:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2024-09-18 15:52:27,817 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 64 [2024-09-18 15:52:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:27,817 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2024-09-18 15:52:27,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:27,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2024-09-18 15:52:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-18 15:52:27,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:27,818 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:27,830 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-09-18 15:52:28,018 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:28,018 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:28,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash -493591002, now seen corresponding path program 33 times [2024-09-18 15:52:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429955564] [2024-09-18 15:52:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:28,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:28,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:28,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:52:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:28,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:28,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429955564] [2024-09-18 15:52:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429955564] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667539778] [2024-09-18 15:52:28,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:52:28,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:28,853 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:28,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-18 15:52:29,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-18 15:52:29,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:29,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 15:52:29,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:29,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:31,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667539778] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:31,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:31,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-18 15:52:31,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205972707] [2024-09-18 15:52:31,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:31,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-18 15:52:31,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-18 15:52:31,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-18 15:52:31,540 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:32,845 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-09-18 15:52:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-18 15:52:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-18 15:52:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:32,847 INFO L225 Difference]: With dead ends: 86 [2024-09-18 15:52:32,847 INFO L226 Difference]: Without dead ends: 77 [2024-09-18 15:52:32,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13931 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-18 15:52:32,848 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:32,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 70 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:52:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-18 15:52:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-18 15:52:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 67 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2024-09-18 15:52:32,870 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 64 [2024-09-18 15:52:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:32,871 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2024-09-18 15:52:32,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:32,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2024-09-18 15:52:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-18 15:52:32,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:32,872 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:32,884 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:33,072 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:33,072 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:33,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1180087452, now seen corresponding path program 34 times [2024-09-18 15:52:33,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:33,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745071704] [2024-09-18 15:52:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:33,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:33,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:33,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:33,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:52:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:33,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:33,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745071704] [2024-09-18 15:52:33,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745071704] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:33,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456928497] [2024-09-18 15:52:33,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:52:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:33,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:33,898 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:33,899 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-18 15:52:34,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:52:34,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:34,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-18 15:52:34,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:34,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:36,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456928497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:36,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:36,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-18 15:52:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156757422] [2024-09-18 15:52:36,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:36,477 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-18 15:52:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-18 15:52:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-18 15:52:36,479 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:37,715 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2024-09-18 15:52:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-18 15:52:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-18 15:52:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:37,717 INFO L225 Difference]: With dead ends: 93 [2024-09-18 15:52:37,717 INFO L226 Difference]: Without dead ends: 83 [2024-09-18 15:52:37,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13844 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-18 15:52:37,719 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:37,719 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 52 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-18 15:52:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2024-09-18 15:52:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.078125) internal successors, (69), 66 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-09-18 15:52:37,753 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 65 [2024-09-18 15:52:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:37,753 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-09-18 15:52:37,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:37,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-09-18 15:52:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-18 15:52:37,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:37,754 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:37,778 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:37,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:37,955 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:37,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:37,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1781316645, now seen corresponding path program 34 times [2024-09-18 15:52:37,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:37,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892579966] [2024-09-18 15:52:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:37,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:52:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:38,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:38,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892579966] [2024-09-18 15:52:38,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892579966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:38,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573518147] [2024-09-18 15:52:38,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:52:38,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:38,735 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:38,735 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-18 15:52:38,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:52:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:38,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-18 15:52:38,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:39,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:41,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573518147] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:41,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:41,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-18 15:52:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689264710] [2024-09-18 15:52:41,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:41,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-18 15:52:41,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:41,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-18 15:52:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-18 15:52:41,423 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:42,622 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2024-09-18 15:52:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-18 15:52:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-18 15:52:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:42,624 INFO L225 Difference]: With dead ends: 87 [2024-09-18 15:52:42,624 INFO L226 Difference]: Without dead ends: 75 [2024-09-18 15:52:42,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13839 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-18 15:52:42,625 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:42,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 49 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-18 15:52:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-18 15:52:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2024-09-18 15:52:42,656 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 65 [2024-09-18 15:52:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:42,656 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2024-09-18 15:52:42,656 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:42,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2024-09-18 15:52:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-18 15:52:42,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:42,657 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:42,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:42,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:42,858 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -514784735, now seen corresponding path program 35 times [2024-09-18 15:52:42,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85536540] [2024-09-18 15:52:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:42,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:42,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:43,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:52:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:43,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:43,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85536540] [2024-09-18 15:52:43,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85536540] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:43,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105323340] [2024-09-18 15:52:43,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:52:43,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:43,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:43,617 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:43,618 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-18 15:52:43,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-18 15:52:43,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:43,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-18 15:52:43,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:44,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:46,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105323340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:46,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:46,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-18 15:52:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661646728] [2024-09-18 15:52:46,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:46,701 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-18 15:52:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-18 15:52:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-18 15:52:46,704 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:47,995 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-09-18 15:52:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-18 15:52:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-18 15:52:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:47,996 INFO L225 Difference]: With dead ends: 93 [2024-09-18 15:52:47,996 INFO L226 Difference]: Without dead ends: 82 [2024-09-18 15:52:47,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15394 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-18 15:52:47,999 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:47,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:52:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-18 15:52:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-09-18 15:52:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2024-09-18 15:52:48,021 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 66 [2024-09-18 15:52:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:48,021 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2024-09-18 15:52:48,022 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:48,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:48,022 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2024-09-18 15:52:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-18 15:52:48,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:48,022 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:48,040 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:48,223 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:48,223 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:48,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash -535311583, now seen corresponding path program 35 times [2024-09-18 15:52:48,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:48,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409890609] [2024-09-18 15:52:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:48,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:48,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:48,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:48,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:52:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:49,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:49,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409890609] [2024-09-18 15:52:49,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409890609] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:49,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636271461] [2024-09-18 15:52:49,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:52:49,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:49,377 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:49,378 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-18 15:52:49,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-18 15:52:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:49,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-18 15:52:49,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:50,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:52,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636271461] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:52,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:52,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-18 15:52:52,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842787288] [2024-09-18 15:52:52,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:52,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-18 15:52:52,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-18 15:52:52,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-18 15:52:52,304 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:53,740 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-09-18 15:52:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-18 15:52:53,740 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-18 15:52:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:53,741 INFO L225 Difference]: With dead ends: 88 [2024-09-18 15:52:53,741 INFO L226 Difference]: Without dead ends: 79 [2024-09-18 15:52:53,744 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15373 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-18 15:52:53,744 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:53,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 82 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:52:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-18 15:52:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-09-18 15:52:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 69 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-09-18 15:52:53,795 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 66 [2024-09-18 15:52:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:53,795 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-09-18 15:52:53,796 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:53,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-09-18 15:52:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-18 15:52:53,796 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:53,796 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:53,809 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-18 15:52:53,997 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:53,997 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:53,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash -543333477, now seen corresponding path program 36 times [2024-09-18 15:52:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:53,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420493439] [2024-09-18 15:52:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:54,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:54,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:54,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-18 15:52:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:52:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420493439] [2024-09-18 15:52:54,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420493439] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:52:54,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594475769] [2024-09-18 15:52:54,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:52:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:52:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:52:54,933 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:52:54,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-18 15:52:55,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-18 15:52:55,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:52:55,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-18 15:52:55,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:52:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:56,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:52:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:52:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594475769] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:52:57,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:52:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-18 15:52:57,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311474618] [2024-09-18 15:52:57,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:52:57,730 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-18 15:52:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:52:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-18 15:52:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-18 15:52:57,732 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:52:59,074 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2024-09-18 15:52:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-18 15:52:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-18 15:52:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:52:59,076 INFO L225 Difference]: With dead ends: 95 [2024-09-18 15:52:59,076 INFO L226 Difference]: Without dead ends: 85 [2024-09-18 15:52:59,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15240 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-18 15:52:59,079 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:52:59,079 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:52:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-18 15:52:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-09-18 15:52:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 68 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:52:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-09-18 15:52:59,109 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2024-09-18 15:52:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:52:59,110 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-09-18 15:52:59,110 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:52:59,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-09-18 15:52:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-18 15:52:59,111 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:52:59,111 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:52:59,128 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-09-18 15:52:59,311 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-18 15:52:59,312 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:52:59,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:52:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1220312640, now seen corresponding path program 36 times [2024-09-18 15:52:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:52:59,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562880212] [2024-09-18 15:52:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:52:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:52:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:59,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:52:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:59,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:52:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:52:59,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:52:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:00,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:00,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562880212] [2024-09-18 15:53:00,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562880212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:00,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210652444] [2024-09-18 15:53:00,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:53:00,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:00,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:00,091 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:53:00,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-18 15:53:00,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-18 15:53:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:00,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-18 15:53:00,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:01,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:03,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210652444] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:03,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:03,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-18 15:53:03,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866462677] [2024-09-18 15:53:03,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:03,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-18 15:53:03,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:03,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-18 15:53:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-18 15:53:03,032 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:04,234 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2024-09-18 15:53:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-18 15:53:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-18 15:53:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:04,235 INFO L225 Difference]: With dead ends: 89 [2024-09-18 15:53:04,235 INFO L226 Difference]: Without dead ends: 77 [2024-09-18 15:53:04,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15339 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-18 15:53:04,238 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:04,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 34 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:53:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-18 15:53:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-18 15:53:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:53:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2024-09-18 15:53:04,259 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2024-09-18 15:53:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:04,259 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2024-09-18 15:53:04,259 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:04,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2024-09-18 15:53:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-18 15:53:04,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:04,260 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:04,272 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-09-18 15:53:04,460 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:04,460 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:04,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2044719306, now seen corresponding path program 37 times [2024-09-18 15:53:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58722744] [2024-09-18 15:53:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:04,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:04,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:53:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:04,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-18 15:53:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:05,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58722744] [2024-09-18 15:53:05,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58722744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819909327] [2024-09-18 15:53:05,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:53:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:05,298 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:53:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-18 15:53:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:05,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 15:53:05,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:06,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819909327] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:08,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2024-09-18 15:53:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404459355] [2024-09-18 15:53:08,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:08,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-18 15:53:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-18 15:53:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2024-09-18 15:53:08,561 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:10,061 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-09-18 15:53:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-18 15:53:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2024-09-18 15:53:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:10,062 INFO L225 Difference]: With dead ends: 95 [2024-09-18 15:53:10,062 INFO L226 Difference]: Without dead ends: 84 [2024-09-18 15:53:10,064 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16758 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5473, Invalid=30437, Unknown=0, NotChecked=0, Total=35910 [2024-09-18 15:53:10,064 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:10,064 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 73 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:53:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-18 15:53:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2024-09-18 15:53:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:53:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2024-09-18 15:53:10,084 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 68 [2024-09-18 15:53:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:10,084 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2024-09-18 15:53:10,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:10,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2024-09-18 15:53:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-18 15:53:10,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:10,085 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:10,105 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-09-18 15:53:10,285 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:10,286 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:10,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash 335301638, now seen corresponding path program 37 times [2024-09-18 15:53:10,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:10,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934027292] [2024-09-18 15:53:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:10,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:10,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:10,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:53:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:10,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-18 15:53:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:11,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:11,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934027292] [2024-09-18 15:53:11,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934027292] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:11,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878988329] [2024-09-18 15:53:11,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:53:11,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:11,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:11,236 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:53:11,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-18 15:53:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:11,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 15:53:11,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:12,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878988329] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:14,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:14,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2024-09-18 15:53:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769702409] [2024-09-18 15:53:14,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:14,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-18 15:53:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-18 15:53:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2024-09-18 15:53:14,323 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:15,791 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2024-09-18 15:53:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-18 15:53:15,792 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2024-09-18 15:53:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:15,792 INFO L225 Difference]: With dead ends: 90 [2024-09-18 15:53:15,792 INFO L226 Difference]: Without dead ends: 81 [2024-09-18 15:53:15,795 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16843 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5473, Invalid=30437, Unknown=0, NotChecked=0, Total=35910 [2024-09-18 15:53:15,795 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:15,796 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 76 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:53:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-18 15:53:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-18 15:53:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 71 states have internal predecessors, (75), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-18 15:53:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2024-09-18 15:53:15,830 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 68 [2024-09-18 15:53:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:15,830 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2024-09-18 15:53:15,830 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:15,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2024-09-18 15:53:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-18 15:53:15,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:15,831 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:15,843 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-09-18 15:53:16,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:16,031 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:16,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 379182020, now seen corresponding path program 38 times [2024-09-18 15:53:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:16,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271778263] [2024-09-18 15:53:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:16,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:16,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:53:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:16,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-18 15:53:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:16,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:16,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271778263] [2024-09-18 15:53:16,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271778263] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:16,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022419340] [2024-09-18 15:53:16,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:16,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:16,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:16,978 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:53:16,979 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-18 15:53:17,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:17,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:17,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-18 15:53:17,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 210 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:18,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:19,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022419340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:19,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2024-09-18 15:53:19,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674627554] [2024-09-18 15:53:19,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:19,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-09-18 15:53:19,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-09-18 15:53:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2024-09-18 15:53:19,932 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 140 states, 140 states have (on average 1.1214285714285714) internal successors, (157), 139 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)