./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.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 ca6b6f09277139d829682a6458fdcdacf72411331aa404fd46248e3dcb9a9e7f --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:12:25,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:12:25,256 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:12:25,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:12:25,260 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:12:25,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:12:25,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:12:25,285 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:12:25,286 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:12:25,286 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:12:25,286 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:12:25,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:12:25,287 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:12:25,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:12:25,288 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:12:25,288 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:12:25,289 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:12:25,289 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:12:25,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:12:25,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:12:25,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:12:25,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:12:25,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:12:25,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:12:25,291 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:12:25,292 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:12:25,292 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:12:25,292 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:12:25,293 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:12:25,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:12:25,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:12:25,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:12:25,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:12:25,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:12:25,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:12:25,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:12:25,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:12:25,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:12:25,295 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:12:25,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:12:25,296 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:12:25,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:12:25,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca6b6f09277139d829682a6458fdcdacf72411331aa404fd46248e3dcb9a9e7f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 19:12:25,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:12:25,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:12:25,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:12:25,550 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:12:25,550 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:12:25,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c [2024-09-17 19:12:26,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:12:27,147 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:12:27,151 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c [2024-09-17 19:12:27,160 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/630f09cdf/0c5171826d964972be7edc00c7c5fc0d/FLAGc87759d3a [2024-09-17 19:12:27,176 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/630f09cdf/0c5171826d964972be7edc00c7c5fc0d [2024-09-17 19:12:27,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:12:27,182 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 19:12:27,183 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:12:27,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:12:27,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:12:27,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50df0d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27, skipping insertion in model container [2024-09-17 19:12:27,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,209 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:12:27,383 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2024-09-17 19:12:27,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:12:27,403 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 19:12:27,415 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2024-09-17 19:12:27,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:12:27,445 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:12:27,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27 WrapperNode [2024-09-17 19:12:27,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:12:27,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:12:27,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:12:27,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:12:27,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,460 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,466 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 19:12:27,466 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:12:27,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:12:27,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:12:27,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:12:27,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,506 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-17 19:12:27,507 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,507 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:12:27,515 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:12:27,516 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:12:27,516 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:12:27,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (1/1) ... [2024-09-17 19:12:27,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:12:27,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:27,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-17 19:12:27,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-17 19:12:27,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:12:27,596 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 19:12:27,596 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 19:12:27,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 19:12:27,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 19:12:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:12:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 19:12:27,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 19:12:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:12:27,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:12:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 19:12:27,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 19:12:27,653 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:12:27,654 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:12:27,773 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-17 19:12:27,773 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:12:27,795 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:12:27,795 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-17 19:12:27,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:12:27 BoogieIcfgContainer [2024-09-17 19:12:27,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:12:27,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:12:27,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:12:27,801 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:12:27,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:12:27" (1/3) ... [2024-09-17 19:12:27,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c781da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:12:27, skipping insertion in model container [2024-09-17 19:12:27,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:12:27" (2/3) ... [2024-09-17 19:12:27,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c781da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:12:27, skipping insertion in model container [2024-09-17 19:12:27,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:12:27" (3/3) ... [2024-09-17 19:12:27,804 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.c [2024-09-17 19:12:27,819 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:12:27,820 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 19:12:27,866 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:12:27,871 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;@2061b06a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:12:27,872 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 19:12:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:12:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 19:12:27,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:27,883 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:27,884 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:27,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-17 19:12:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:27,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549173135] [2024-09-17 19:12:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:28,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:12:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:28,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:12:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:28,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:12:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:28,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:12:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:28,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:28,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549173135] [2024-09-17 19:12:28,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549173135] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:12:28,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:12:28,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 19:12:28,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550605082] [2024-09-17 19:12:28,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:28,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 19:12:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 19:12:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:12:28,131 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 19:12:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:28,165 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-17 19:12:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 19:12:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-17 19:12:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:28,174 INFO L225 Difference]: With dead ends: 54 [2024-09-17 19:12:28,174 INFO L226 Difference]: Without dead ends: 26 [2024-09-17 19:12:28,177 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:12:28,181 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:28,182 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:12:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-17 19:12:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-17 19:12:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 19:12:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-17 19:12:28,221 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-17 19:12:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:28,222 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-17 19:12:28,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 19:12:28,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-17 19:12:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 19:12:28,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:28,226 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:28,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:12:28,226 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:28,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-17 19:12:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:28,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076637754] [2024-09-17 19:12:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:28,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:28,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079028847] [2024-09-17 19:12:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:28,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:28,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:28,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:28,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:12:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:28,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 19:12:28,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:28,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:28,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:28,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076637754] [2024-09-17 19:12:28,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079028847] [2024-09-17 19:12:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079028847] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:28,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:12:28,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-17 19:12:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573206135] [2024-09-17 19:12:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:28,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:12:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:12:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-17 19:12:28,796 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-17 19:12:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:28,903 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-17 19:12:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:12:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-17 19:12:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:28,906 INFO L225 Difference]: With dead ends: 37 [2024-09-17 19:12:28,906 INFO L226 Difference]: Without dead ends: 35 [2024-09-17 19:12:28,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:12:28,907 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:28,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-17 19:12:28,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-17 19:12:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:12:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-17 19:12:28,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-17 19:12:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:28,930 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-17 19:12:28,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-17 19:12:28,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-17 19:12:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-17 19:12:28,931 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:28,931 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:28,949 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:12:29,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:29,133 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:29,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-17 19:12:29,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:29,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880174079] [2024-09-17 19:12:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:29,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:29,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:12:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:29,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:12:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:29,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:12:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:29,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:12:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:29,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:12:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:29,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880174079] [2024-09-17 19:12:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880174079] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:12:29,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:12:29,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 19:12:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439793199] [2024-09-17 19:12:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:29,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 19:12:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 19:12:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 19:12:29,391 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:29,468 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-17 19:12:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:12:29,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-17 19:12:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:29,470 INFO L225 Difference]: With dead ends: 42 [2024-09-17 19:12:29,470 INFO L226 Difference]: Without dead ends: 35 [2024-09-17 19:12:29,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 19:12:29,471 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:29,472 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-17 19:12:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-17 19:12:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:12:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-17 19:12:29,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-17 19:12:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:29,488 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-17 19:12:29,488 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:29,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-17 19:12:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 19:12:29,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:29,491 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:29,491 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 19:12:29,491 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:29,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-17 19:12:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:29,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879874936] [2024-09-17 19:12:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:29,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343907027] [2024-09-17 19:12:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:29,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:29,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:29,550 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:12:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:29,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 19:12:29,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:29,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:12:30,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:30,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879874936] [2024-09-17 19:12:30,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:30,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343907027] [2024-09-17 19:12:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343907027] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:30,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:12:30,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-17 19:12:30,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29403220] [2024-09-17 19:12:30,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:12:30,897 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 19:12:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 19:12:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:12:30,898 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:31,106 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-17 19:12:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 19:12:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-17 19:12:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:31,108 INFO L225 Difference]: With dead ends: 45 [2024-09-17 19:12:31,108 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 19:12:31,109 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-17 19:12:31,110 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:31,110 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 19:12:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-17 19:12:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:12:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-17 19:12:31,120 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-17 19:12:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:31,121 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-17 19:12:31,121 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 19:12:31,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-17 19:12:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 19:12:31,122 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:31,122 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:31,139 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:12:31,323 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:31,324 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:31,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-17 19:12:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426437963] [2024-09-17 19:12:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591402842] [2024-09-17 19:12:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:31,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:31,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:31,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:12:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:31,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-17 19:12:31,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:31,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:12:32,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426437963] [2024-09-17 19:12:32,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591402842] [2024-09-17 19:12:32,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591402842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:12:32,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:12:32,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-17 19:12:32,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416455993] [2024-09-17 19:12:32,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:32,388 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:12:32,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:12:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:12:32,390 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-17 19:12:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:33,025 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-17 19:12:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:12:33,026 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2024-09-17 19:12:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:33,028 INFO L225 Difference]: With dead ends: 67 [2024-09-17 19:12:33,028 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 19:12:33,029 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-17 19:12:33,030 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:33,030 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:12:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 19:12:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-17 19:12:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 19:12:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-17 19:12:33,047 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-17 19:12:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:33,047 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-17 19:12:33,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-17 19:12:33,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-17 19:12:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-17 19:12:33,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:33,052 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:33,069 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 19:12:33,252 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:33,253 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:33,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-17 19:12:33,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:33,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723545363] [2024-09-17 19:12:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183116468] [2024-09-17 19:12:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:33,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:33,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:33,283 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:12:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:33,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 19:12:33,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:12:33,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:12:33,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:33,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723545363] [2024-09-17 19:12:33,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:33,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183116468] [2024-09-17 19:12:33,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183116468] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:12:33,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:12:33,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-17 19:12:33,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200227884] [2024-09-17 19:12:33,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:33,471 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 19:12:33,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 19:12:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-17 19:12:33,472 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-17 19:12:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:33,562 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-17 19:12:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 19:12:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 42 [2024-09-17 19:12:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:33,563 INFO L225 Difference]: With dead ends: 67 [2024-09-17 19:12:33,563 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 19:12:33,564 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:12:33,564 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:33,565 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 19:12:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-17 19:12:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 19:12:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-17 19:12:33,587 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-17 19:12:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:33,587 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-17 19:12:33,588 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-17 19:12:33,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-17 19:12:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-17 19:12:33,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:33,591 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:33,604 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 19:12:33,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:33,794 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:33,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-17 19:12:33,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:33,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458773157] [2024-09-17 19:12:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:33,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:12:33,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932199947] [2024-09-17 19:12:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:33,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:33,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:33,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:33,833 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:12:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:33,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-17 19:12:33,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-17 19:12:34,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-17 19:12:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458773157] [2024-09-17 19:12:39,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:12:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932199947] [2024-09-17 19:12:39,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932199947] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:12:39,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:12:39,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2024-09-17 19:12:39,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130435821] [2024-09-17 19:12:39,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:39,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 19:12:39,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 19:12:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-09-17 19:12:39,025 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-17 19:12:40,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 19:12:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:48,020 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-17 19:12:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:12:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2024-09-17 19:12:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:48,022 INFO L225 Difference]: With dead ends: 90 [2024-09-17 19:12:48,022 INFO L226 Difference]: Without dead ends: 88 [2024-09-17 19:12:48,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:12:48,024 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:48,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 151 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-17 19:12:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-17 19:12:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-17 19:12:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 19:12:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-17 19:12:48,056 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-17 19:12:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:48,058 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-17 19:12:48,058 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-17 19:12:48,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-17 19:12:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-17 19:12:48,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:48,060 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:48,076 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-17 19:12:48,260 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 19:12:48,260 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:48,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-17 19:12:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:48,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396156153] [2024-09-17 19:12:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:48,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:12:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:48,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:12:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:48,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:12:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:48,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:12:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:48,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:12:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:49,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 19:12:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:49,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 19:12:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:49,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 19:12:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:12:49,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:49,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396156153] [2024-09-17 19:12:49,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396156153] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:49,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655662232] [2024-09-17 19:12:49,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:12:49,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:49,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:49,033 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:49,035 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:12:49,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:12:49,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:12:49,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-17 19:12:49,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:12:49,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:12:49,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655662232] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:12:49,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:12:49,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2024-09-17 19:12:49,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953516863] [2024-09-17 19:12:49,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:49,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 19:12:49,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:49,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 19:12:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2024-09-17 19:12:49,759 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-09-17 19:12:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:50,270 INFO L93 Difference]: Finished difference Result 141 states and 167 transitions. [2024-09-17 19:12:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 19:12:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) Word has length 63 [2024-09-17 19:12:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:50,272 INFO L225 Difference]: With dead ends: 141 [2024-09-17 19:12:50,272 INFO L226 Difference]: Without dead ends: 67 [2024-09-17 19:12:50,273 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=1278, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:12:50,274 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:50,274 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 298 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:12:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-17 19:12:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-17 19:12:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 49 states have internal predecessors, (49), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 19:12:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2024-09-17 19:12:50,294 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 63 [2024-09-17 19:12:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:50,294 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2024-09-17 19:12:50,294 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-09-17 19:12:50,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2024-09-17 19:12:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-17 19:12:50,295 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:50,296 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:50,312 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 19:12:50,496 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:50,497 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:50,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 358652046, now seen corresponding path program 3 times [2024-09-17 19:12:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125890480] [2024-09-17 19:12:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:12:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:12:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:12:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:12:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:12:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 19:12:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 19:12:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 19:12:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:12:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125890480] [2024-09-17 19:12:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125890480] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733232074] [2024-09-17 19:12:51,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:12:51,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:51,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:51,090 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:12:51,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 19:12:51,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:12:51,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-17 19:12:51,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-17 19:12:52,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:54,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733232074] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:54,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:12:54,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2024-09-17 19:12:54,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291591049] [2024-09-17 19:12:54,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:54,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:12:54,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:54,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:12:54,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2024-09-17 19:12:54,449 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-17 19:12:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:55,293 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2024-09-17 19:12:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-17 19:12:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 63 [2024-09-17 19:12:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:55,294 INFO L225 Difference]: With dead ends: 77 [2024-09-17 19:12:55,295 INFO L226 Difference]: Without dead ends: 50 [2024-09-17 19:12:55,295 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 19:12:55,296 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:55,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 330 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:12:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-17 19:12:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-17 19:12:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:12:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-17 19:12:55,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 63 [2024-09-17 19:12:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:55,310 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-17 19:12:55,311 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-17 19:12:55,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-17 19:12:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-17 19:12:55,312 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:12:55,312 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:12:55,325 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 19:12:55,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:55,513 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:12:55,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 499200656, now seen corresponding path program 2 times [2024-09-17 19:12:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:12:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685272924] [2024-09-17 19:12:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:12:55,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:12:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:12:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:12:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:12:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:12:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:12:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 19:12:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 19:12:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 19:12:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:12:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:12:56,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:12:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685272924] [2024-09-17 19:12:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685272924] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:12:56,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230694071] [2024-09-17 19:12:56,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:12:56,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:12:56,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:12:56,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:12:56,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:12:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:12:56,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 19:12:56,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:12:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:12:56,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:12:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:12:57,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230694071] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:12:57,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:12:57,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2024-09-17 19:12:57,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172537653] [2024-09-17 19:12:57,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:12:57,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:12:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:12:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:12:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:12:57,002 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 26 states have internal predecessors, (66), 17 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 17 states have call predecessors, (20), 16 states have call successors, (20) [2024-09-17 19:12:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:12:57,202 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-09-17 19:12:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 19:12:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 26 states have internal predecessors, (66), 17 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 17 states have call predecessors, (20), 16 states have call successors, (20) Word has length 63 [2024-09-17 19:12:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:12:57,205 INFO L225 Difference]: With dead ends: 52 [2024-09-17 19:12:57,205 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:12:57,206 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 19:12:57,206 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:12:57,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 246 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:12:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:12:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:12:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:12:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:12:57,209 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-09-17 19:12:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:12:57,209 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:12:57,210 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 26 states have internal predecessors, (66), 17 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 17 states have call predecessors, (20), 16 states have call successors, (20) [2024-09-17 19:12:57,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:12:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:12:57,210 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:12:57,214 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 19:12:57,221 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 19:12:57,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:12:57,420 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2024-09-17 19:12:57,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-17 19:13:01,625 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:13:01,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:13:01 BoogieIcfgContainer [2024-09-17 19:13:01,649 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:13:01,649 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-17 19:13:01,649 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-17 19:13:01,649 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-17 19:13:01,650 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:12:27" (3/4) ... [2024-09-17 19:13:01,651 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-17 19:13:01,702 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-17 19:13:01,702 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-17 19:13:01,703 INFO L158 Benchmark]: Toolchain (without parser) took 34520.40ms. Allocated memory was 155.2MB in the beginning and 195.0MB in the end (delta: 39.8MB). Free memory was 85.8MB in the beginning and 103.8MB in the end (delta: -18.1MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. [2024-09-17 19:13:01,703 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 155.2MB. Free memory is still 114.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:13:01,705 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.95ms. Allocated memory is still 155.2MB. Free memory was 85.5MB in the beginning and 117.7MB in the end (delta: -32.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-17 19:13:01,705 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.85ms. Allocated memory is still 155.2MB. Free memory was 117.7MB in the beginning and 116.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:13:01,705 INFO L158 Benchmark]: Boogie Preprocessor took 47.88ms. Allocated memory is still 155.2MB. Free memory was 116.2MB in the beginning and 114.9MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-17 19:13:01,706 INFO L158 Benchmark]: RCFGBuilder took 280.47ms. Allocated memory is still 155.2MB. Free memory was 114.9MB in the beginning and 101.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 19:13:01,706 INFO L158 Benchmark]: TraceAbstraction took 33850.96ms. Allocated memory was 155.2MB in the beginning and 195.0MB in the end (delta: 39.8MB). Free memory was 101.0MB in the beginning and 107.0MB in the end (delta: -6.0MB). Peak memory consumption was 92.9MB. Max. memory is 16.1GB. [2024-09-17 19:13:01,706 INFO L158 Benchmark]: Witness Printer took 52.68ms. Allocated memory is still 195.0MB. Free memory was 105.9MB in the beginning and 103.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:13:01,708 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 155.2MB. Free memory is still 114.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.95ms. Allocated memory is still 155.2MB. Free memory was 85.5MB in the beginning and 117.7MB in the end (delta: -32.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.85ms. Allocated memory is still 155.2MB. Free memory was 117.7MB in the beginning and 116.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.88ms. Allocated memory is still 155.2MB. Free memory was 116.2MB in the beginning and 114.9MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 280.47ms. Allocated memory is still 155.2MB. Free memory was 114.9MB in the beginning and 101.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 33850.96ms. Allocated memory was 155.2MB in the beginning and 195.0MB in the end (delta: 39.8MB). Free memory was 101.0MB in the beginning and 107.0MB in the end (delta: -6.0MB). Peak memory consumption was 92.9MB. Max. memory is 16.1GB. * Witness Printer took 52.68ms. Allocated memory is still 195.0MB. Free memory was 105.9MB in the beginning and 103.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.6s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 11.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 137 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 131 mSDsluCounter, 1625 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1387 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1480 IncrementalHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 238 mSDtfsCounter, 1480 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 870 GetRequests, 648 SyntacticMatches, 23 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 14.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 810 NumberOfCodeBlocks, 801 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 916 ConstructedInterpolants, 8 QuantifiedInterpolants, 5036 SizeOfPredicates, 12 NumberOfNonLiveVariables, 897 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 722/874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((((z == 0) && (y == (b / 2))) && (((long long) a * 2) == x)) && (0 <= a)) && ((b % 2) != 1)) && (1 <= y)) && (a <= 10)) && (y <= 5)) || ((((((((1 <= (b % 2)) && ((z + ((__int128) y * x)) == ((long long) b * a))) && (((long long) a * 2) == x)) && (0 <= a)) && (1 <= b)) && (b <= 10)) && (a <= 10)) && ((((long long) -1 + b) / 2) == y))) || ((((((((z == 0) && (((__int128) y * x) == ((long long) b * a))) && (y <= 2)) && (0 <= a)) && (1 <= b)) && (1 <= y)) && (b <= 10)) && (a <= 10))) || (((((((z == 0) && (b == y)) && (0 <= a)) && (1 <= y)) && (b <= 10)) && (a == x)) && (a <= 10))) || (((((((0 <= y) && ((z + ((__int128) y * x)) == ((long long) b * a))) && (0 <= a)) && (1 <= b)) && (b <= 10)) && (a <= 10)) && (y <= 1))) || ((((((((0 <= y) && ((z + ((__int128) y * x)) == ((long long) b * a))) && (y <= 2)) && (0 <= a)) && (x == ((__int128) z * 2))) && (1 <= b)) && (b <= 10)) && (a <= 10))) || (((((((((a == z) && (1 <= (b % 2))) && (((long long) a * 4) == x)) && (0 <= a)) && (0 <= b)) && (((((long long) -1 + b) / 2) % 2) != 1)) && ((((long long) -1 + b) / 4) == y)) && (b <= 10)) && (a <= 10))) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-17 19:13:01,751 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE