./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/prodbin-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 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/prodbin-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 --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-27b4987-m [2024-09-21 11:43:41,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:43:41,475 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:43:41,481 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:43:41,481 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:43:41,503 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:43:41,504 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:43:41,504 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:43:41,504 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:43:41,506 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:43:41,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:43:41,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:43:41,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:43:41,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:43:41,509 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:43:41,509 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:43:41,509 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:43:41,509 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:43:41,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:43:41,510 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:43:41,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:43:41,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:43:41,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:43:41,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:43:41,511 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:43:41,512 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:43:41,512 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:43:41,512 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:43:41,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:43:41,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:43:41,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:43:41,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:43:41,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:43:41,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:43:41,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:43:41,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:43:41,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:43:41,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:43:41,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:43:41,700 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:43:41,701 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:43:41,702 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2024-09-21 11:43:42,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:43:43,031 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:43:43,031 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2024-09-21 11:43:43,038 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/250791388/160d4120d6f8401f805c61ea03e23a2d/FLAG3cc7109cd [2024-09-21 11:43:43,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/250791388/160d4120d6f8401f805c61ea03e23a2d [2024-09-21 11:43:43,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:43:43,051 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:43:43,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:43:43,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:43:43,056 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:43:43,057 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,057 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66191533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43, skipping insertion in model container [2024-09-21 11:43:43,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,075 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:43:43,207 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/prodbin-ll.c[537,550] [2024-09-21 11:43:43,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:43:43,235 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:43:43,246 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/prodbin-ll.c[537,550] [2024-09-21 11:43:43,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:43:43,266 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:43:43,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43 WrapperNode [2024-09-21 11:43:43,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:43:43,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:43:43,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:43:43,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:43:43,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,281 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:43:43,282 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:43:43,282 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:43:43,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:43:43,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:43:43,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,294 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,304 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]. [2024-09-21 11:43:43,304 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,311 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,312 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:43:43,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:43:43,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:43:43,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:43:43,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (1/1) ... [2024-09-21 11:43:43,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:43:43,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:43,342 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) [2024-09-21 11:43:43,346 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 [2024-09-21 11:43:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:43:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 11:43:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 11:43:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:43:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:43:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:43:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:43:43,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:43:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:43:43,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:43:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:43:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:43:43,442 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:43:43,443 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:43:43,543 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:43:43,544 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:43:43,558 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:43:43,558 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 11:43:43,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:43:43 BoogieIcfgContainer [2024-09-21 11:43:43,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:43:43,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:43:43,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:43:43,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:43:43,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:43:43" (1/3) ... [2024-09-21 11:43:43,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c99f477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:43:43, skipping insertion in model container [2024-09-21 11:43:43,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:43:43" (2/3) ... [2024-09-21 11:43:43,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c99f477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:43:43, skipping insertion in model container [2024-09-21 11:43:43,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:43:43" (3/3) ... [2024-09-21 11:43:43,565 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2024-09-21 11:43:43,576 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:43:43,576 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:43:43,614 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:43:43,618 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;@65a35f7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:43:43,618 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:43:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 11:43:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:43:43,626 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:43,626 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:43,626 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:43,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1759225501, now seen corresponding path program 1 times [2024-09-21 11:43:43,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:43,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315435943] [2024-09-21 11:43:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:43,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:43:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:43,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:43:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:43:43,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:43,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315435943] [2024-09-21 11:43:43,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315435943] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:43:43,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:43:43,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:43:43,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196914499] [2024-09-21 11:43:43,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:43:43,783 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:43:43,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:43:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:43:43,800 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:43:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:43,821 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-09-21 11:43:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:43:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-21 11:43:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:43,827 INFO L225 Difference]: With dead ends: 46 [2024-09-21 11:43:43,827 INFO L226 Difference]: Without dead ends: 23 [2024-09-21 11:43:43,829 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:43:43,832 INFO L434 NwaCegarLoop]: 27 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, 27 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 [2024-09-21 11:43:43,832 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:43:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-21 11:43:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-21 11:43:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 11:43:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-21 11:43:43,855 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2024-09-21 11:43:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:43,855 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-21 11:43:43,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:43:43,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-21 11:43:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:43:43,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:43,857 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:43,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:43:43,858 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:43,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:43,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1077379671, now seen corresponding path program 1 times [2024-09-21 11:43:43,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:43,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508702020] [2024-09-21 11:43:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:43,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:43,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471028497] [2024-09-21 11:43:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:43,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:43,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:43,890 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) [2024-09-21 11:43:43,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:43:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:43,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-21 11:43:43,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:43:44,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:43:44,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:44,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508702020] [2024-09-21 11:43:44,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:44,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471028497] [2024-09-21 11:43:44,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471028497] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:43:44,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:43:44,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 11:43:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262219416] [2024-09-21 11:43:44,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:43:44,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 11:43:44,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 11:43:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-21 11:43:44,102 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:43:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:44,182 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-09-21 11:43:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:43:44,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-21 11:43:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:44,184 INFO L225 Difference]: With dead ends: 39 [2024-09-21 11:43:44,184 INFO L226 Difference]: Without dead ends: 32 [2024-09-21 11:43:44,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:43:44,185 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:44,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 80 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:43:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-21 11:43:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-21 11:43:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:43:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-09-21 11:43:44,194 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2024-09-21 11:43:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:44,195 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-09-21 11:43:44,195 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:43:44,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-09-21 11:43:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-21 11:43:44,197 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:44,197 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:44,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:43:44,397 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 [2024-09-21 11:43:44,398 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:44,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:44,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1997288540, now seen corresponding path program 1 times [2024-09-21 11:43:44,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:44,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205573913] [2024-09-21 11:43:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:44,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:44,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422697497] [2024-09-21 11:43:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:44,438 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) [2024-09-21 11:43:44,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:43:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:44,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-21 11:43:44,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:43:44,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:43:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:43:47,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:47,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205573913] [2024-09-21 11:43:47,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:47,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422697497] [2024-09-21 11:43:47,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422697497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:43:47,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:43:47,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2024-09-21 11:43:47,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958461103] [2024-09-21 11:43:47,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:43:47,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 11:43:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 11:43:47,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-21 11:43:47,480 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:43:49,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:43:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:50,492 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2024-09-21 11:43:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 11:43:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-09-21 11:43:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:50,495 INFO L225 Difference]: With dead ends: 47 [2024-09-21 11:43:50,495 INFO L226 Difference]: Without dead ends: 45 [2024-09-21 11:43:50,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:43:50,496 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:50,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 123 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-21 11:43:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-21 11:43:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-09-21 11:43:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 11:43:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-09-21 11:43:50,510 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 25 [2024-09-21 11:43:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:50,511 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-09-21 11:43:50,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:43:50,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-09-21 11:43:50,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-21 11:43:50,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:50,513 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:50,525 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 11:43:50,717 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:50,718 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:50,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -522671394, now seen corresponding path program 1 times [2024-09-21 11:43:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:50,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854816141] [2024-09-21 11:43:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:50,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:50,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331154190] [2024-09-21 11:43:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:50,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:50,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:50,747 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) [2024-09-21 11:43:50,748 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:43:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:50,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-21 11:43:50,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:43:50,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:43:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:43:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854816141] [2024-09-21 11:43:51,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331154190] [2024-09-21 11:43:51,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331154190] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:43:51,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:43:51,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-21 11:43:51,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116069626] [2024-09-21 11:43:51,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:43:51,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 11:43:51,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:51,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 11:43:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-09-21 11:43:51,428 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 11:43:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:51,804 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2024-09-21 11:43:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 11:43:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2024-09-21 11:43:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:51,806 INFO L225 Difference]: With dead ends: 74 [2024-09-21 11:43:51,806 INFO L226 Difference]: Without dead ends: 67 [2024-09-21 11:43:51,807 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:43:51,810 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:51,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 117 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:43:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-21 11:43:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-21 11:43:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 51 states have internal predecessors, (56), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:43:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2024-09-21 11:43:51,830 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 25 [2024-09-21 11:43:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:51,831 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2024-09-21 11:43:51,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 17 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 11:43:51,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2024-09-21 11:43:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-21 11:43:51,832 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:51,832 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:51,844 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:43:52,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:52,037 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:52,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1076616969, now seen corresponding path program 1 times [2024-09-21 11:43:52,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:52,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253407283] [2024-09-21 11:43:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:52,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44331645] [2024-09-21 11:43:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:52,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:52,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:52,055 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) [2024-09-21 11:43:52,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:43:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:52,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 11:43:52,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 11:43:52,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:43:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 11:43:52,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:52,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253407283] [2024-09-21 11:43:52,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:52,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44331645] [2024-09-21 11:43:52,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44331645] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:43:52,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:43:52,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-21 11:43:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374842900] [2024-09-21 11:43:52,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:43:52,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 11:43:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 11:43:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:43:52,202 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-21 11:43:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:52,268 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-09-21 11:43:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:43:52,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 31 [2024-09-21 11:43:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:52,269 INFO L225 Difference]: With dead ends: 73 [2024-09-21 11:43:52,269 INFO L226 Difference]: Without dead ends: 66 [2024-09-21 11:43:52,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:43:52,270 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:52,270 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:43:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-21 11:43:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-21 11:43:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.127659574468085) internal successors, (53), 50 states have internal predecessors, (53), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:43:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2024-09-21 11:43:52,285 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 31 [2024-09-21 11:43:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:52,285 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2024-09-21 11:43:52,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-21 11:43:52,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2024-09-21 11:43:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 11:43:52,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:52,286 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:52,301 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:43:52,490 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:52,491 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:52,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:52,491 INFO L85 PathProgramCache]: Analyzing trace with hash 652238206, now seen corresponding path program 1 times [2024-09-21 11:43:52,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:52,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37288469] [2024-09-21 11:43:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:52,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:52,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474745783] [2024-09-21 11:43:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:52,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:52,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:52,524 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) [2024-09-21 11:43:52,525 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:43:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:43:52,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-21 11:43:52,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-21 11:43:53,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:43:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-21 11:43:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37288469] [2024-09-21 11:43:53,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474745783] [2024-09-21 11:43:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474745783] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:43:53,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:43:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2024-09-21 11:43:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081392376] [2024-09-21 11:43:53,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:43:53,864 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 11:43:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 11:43:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-21 11:43:53,865 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 11:43:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:55,800 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2024-09-21 11:43:55,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 11:43:55,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2024-09-21 11:43:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:55,801 INFO L225 Difference]: With dead ends: 85 [2024-09-21 11:43:55,801 INFO L226 Difference]: Without dead ends: 47 [2024-09-21 11:43:55,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2024-09-21 11:43:55,802 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:55,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-21 11:43:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-21 11:43:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-21 11:43:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 11:43:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-09-21 11:43:55,820 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2024-09-21 11:43:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:55,820 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-09-21 11:43:55,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 11:43:55,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-09-21 11:43:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 11:43:55,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:55,824 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:55,837 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 11:43:56,026 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-21 11:43:56,027 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:56,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:56,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1088875753, now seen corresponding path program 2 times [2024-09-21 11:43:56,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:56,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662751108] [2024-09-21 11:43:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:56,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:56,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095928187] [2024-09-21 11:43:56,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:43:56,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:56,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:56,070 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) [2024-09-21 11:43:56,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:43:56,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:43:56,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:43:56,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-21 11:43:56,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 11:43:57,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:43:58,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:58,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662751108] [2024-09-21 11:43:58,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:58,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095928187] [2024-09-21 11:43:58,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095928187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:43:58,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:43:58,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-21 11:43:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130857248] [2024-09-21 11:43:58,779 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:43:58,779 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 11:43:58,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 11:43:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:43:58,780 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 11:43:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:59,201 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2024-09-21 11:43:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 11:43:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2024-09-21 11:43:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:59,202 INFO L225 Difference]: With dead ends: 61 [2024-09-21 11:43:59,202 INFO L226 Difference]: Without dead ends: 59 [2024-09-21 11:43:59,203 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2024-09-21 11:43:59,203 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:59,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 221 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 11:43:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-21 11:43:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-09-21 11:43:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 11:43:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2024-09-21 11:43:59,215 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2024-09-21 11:43:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:59,215 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2024-09-21 11:43:59,216 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-21 11:43:59,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2024-09-21 11:43:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-21 11:43:59,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:59,216 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:59,229 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 11:43:59,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:59,418 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:59,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161186, now seen corresponding path program 3 times [2024-09-21 11:43:59,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:59,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857921495] [2024-09-21 11:43:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:59,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143349215] [2024-09-21 11:43:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:43:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:59,459 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) [2024-09-21 11:43:59,460 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:43:59,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-21 11:43:59,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:43:59,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-21 11:43:59,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 11:44:01,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:44:32,689 WARN L293 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 262 DAG size of output: 260 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-21 11:44:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 11:44:43,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:43,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857921495] [2024-09-21 11:44:43,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:43,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143349215] [2024-09-21 11:44:43,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143349215] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:44:43,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:44:43,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2024-09-21 11:44:43,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101555166] [2024-09-21 11:44:43,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:44:43,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-21 11:44:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-21 11:44:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2024-09-21 11:44:43,640 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 29 states have internal predecessors, (62), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2024-09-21 11:45:40,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:46:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:46:00,450 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2024-09-21 11:46:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-21 11:46:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 29 states have internal predecessors, (62), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 61 [2024-09-21 11:46:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:46:00,452 INFO L225 Difference]: With dead ends: 97 [2024-09-21 11:46:00,452 INFO L226 Difference]: Without dead ends: 95 [2024-09-21 11:46:00,455 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 89.8s TimeCoverageRelationStatistics Valid=480, Invalid=1589, Unknown=1, NotChecked=0, Total=2070 [2024-09-21 11:46:00,456 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:46:00,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 341 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-09-21 11:46:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-21 11:46:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-09-21 11:46:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 11:46:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2024-09-21 11:46:00,500 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2024-09-21 11:46:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:46:00,500 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2024-09-21 11:46:00,500 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 29 states have internal predecessors, (62), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2024-09-21 11:46:00,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:46:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2024-09-21 11:46:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-09-21 11:46:00,502 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:46:00,502 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:46:00,508 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 11:46:00,703 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:46:00,704 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:46:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:46:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash 955247465, now seen corresponding path program 4 times [2024-09-21 11:46:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:46:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956579777] [2024-09-21 11:46:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:46:00,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:46:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:46:00,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630471002] [2024-09-21 11:46:00,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:46:00,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:46:00,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:46:00,790 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) [2024-09-21 11:46:00,791 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:46:00,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:46:00,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:46:00,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-21 11:46:00,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:46:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 56 proven. 355 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-21 11:46:02,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:46:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:46:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956579777] [2024-09-21 11:46:03,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:46:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630471002] [2024-09-21 11:46:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630471002] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:46:03,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:46:03,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2024-09-21 11:46:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017131369] [2024-09-21 11:46:03,141 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:46:03,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-21 11:46:03,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:46:03,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-21 11:46:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2024-09-21 11:46:03,143 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-21 11:46:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:46:03,852 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2024-09-21 11:46:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-21 11:46:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 124 [2024-09-21 11:46:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:46:03,853 INFO L225 Difference]: With dead ends: 109 [2024-09-21 11:46:03,853 INFO L226 Difference]: Without dead ends: 107 [2024-09-21 11:46:03,854 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2024-09-21 11:46:03,854 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 11:46:03,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 689 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 11:46:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-21 11:46:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2024-09-21 11:46:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 79 states have internal predecessors, (79), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-21 11:46:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2024-09-21 11:46:03,896 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 124 [2024-09-21 11:46:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:46:03,897 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2024-09-21 11:46:03,897 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-21 11:46:03,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:46:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2024-09-21 11:46:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-21 11:46:03,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:46:03,898 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:46:03,912 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-21 11:46:04,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:46:04,101 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:46:04,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:46:04,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1070642462, now seen corresponding path program 5 times [2024-09-21 11:46:04,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:46:04,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908939439] [2024-09-21 11:46:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:46:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:46:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:46:04,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920546352] [2024-09-21 11:46:04,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:46:04,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:46:04,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:46:04,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:46:04,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 11:46:04,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-21 11:46:04,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:46:04,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-21 11:46:04,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:47:28,663 WARN L249 Executor]: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-09-21 11:47:28,664 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 101 [2024-09-21 11:47:28,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:47:28,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908939439] [2024-09-21 11:47:28,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:47:28,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920546352] [2024-09-21 11:47:28,665 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-09-21 11:47:28,677 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 11:47:28,865 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-21 11:47:28,866 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:950) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:298) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:327) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:421) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 44 more [2024-09-21 11:47:28,869 INFO L158 Benchmark]: Toolchain (without parser) took 225818.31ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 111.4MB in the beginning and 145.9MB in the end (delta: -34.4MB). Peak memory consumption was 93.9MB. Max. memory is 16.1GB. [2024-09-21 11:47:28,869 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:47:28,869 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.57ms. Allocated memory is still 178.3MB. Free memory was 111.3MB in the beginning and 100.0MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-21 11:47:28,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 14.34ms. Allocated memory is still 178.3MB. Free memory was 99.8MB in the beginning and 98.9MB in the end (delta: 939.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 11:47:28,870 INFO L158 Benchmark]: Boogie Preprocessor took 29.83ms. Allocated memory is still 178.3MB. Free memory was 98.9MB in the beginning and 97.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:47:28,870 INFO L158 Benchmark]: RCFGBuilder took 246.32ms. Allocated memory is still 178.3MB. Free memory was 97.2MB in the beginning and 143.2MB in the end (delta: -46.1MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2024-09-21 11:47:28,870 INFO L158 Benchmark]: TraceAbstraction took 225308.90ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 142.5MB in the beginning and 145.9MB in the end (delta: -3.4MB). Peak memory consumption was 123.9MB. Max. memory is 16.1GB. [2024-09-21 11:47:28,871 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.57ms. Allocated memory is still 178.3MB. Free memory was 111.3MB in the beginning and 100.0MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 14.34ms. Allocated memory is still 178.3MB. Free memory was 99.8MB in the beginning and 98.9MB in the end (delta: 939.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.83ms. Allocated memory is still 178.3MB. Free memory was 98.9MB in the beginning and 97.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 246.32ms. Allocated memory is still 178.3MB. Free memory was 97.2MB in the beginning and 143.2MB in the end (delta: -46.1MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * TraceAbstraction took 225308.90ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 142.5MB in the beginning and 145.9MB in the end (delta: -3.4MB). Peak memory consumption was 123.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/prodbin-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.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 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 --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-27b4987-m [2024-09-21 11:47:30,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:47:30,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-21 11:47:30,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:47:30,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:47:30,377 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:47:30,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:47:30,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:47:30,380 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:47:30,383 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:47:30,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:47:30,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:47:30,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:47:30,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:47:30,386 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:47:30,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:47:30,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:47:30,387 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:47:30,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:47:30,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:47:30,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:47:30,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:47:30,388 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:47:30,389 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-21 11:47:30,389 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-21 11:47:30,389 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:47:30,389 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-21 11:47:30,389 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:47:30,389 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:47:30,390 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:47:30,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:47:30,390 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:47:30,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:47:30,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:47:30,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:47:30,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:47:30,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:47:30,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:47:30,392 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-21 11:47:30,392 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-21 11:47:30,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:47:30,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:47:30,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:47:30,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:47:30,393 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-21 11:47:30,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:47:30,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:47:30,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:47:30,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:47:30,631 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:47:30,632 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:47:30,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2024-09-21 11:47:31,891 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:47:32,024 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:47:32,025 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2024-09-21 11:47:32,031 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/626dc20a8/580713333f8240e9832699066366a590/FLAGb5adbbce0 [2024-09-21 11:47:32,041 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/626dc20a8/580713333f8240e9832699066366a590 [2024-09-21 11:47:32,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:47:32,043 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:47:32,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:47:32,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:47:32,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:47:32,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcad6d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32, skipping insertion in model container [2024-09-21 11:47:32,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,062 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:47:32,196 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/prodbin-ll.c[537,550] [2024-09-21 11:47:32,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:47:32,224 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:47:32,235 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/prodbin-ll.c[537,550] [2024-09-21 11:47:32,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:47:32,252 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:47:32,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32 WrapperNode [2024-09-21 11:47:32,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:47:32,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:47:32,254 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:47:32,254 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:47:32,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,270 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:47:32,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:47:32,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:47:32,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:47:32,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:47:32,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,279 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,290 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]. [2024-09-21 11:47:32,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,300 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:47:32,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:47:32,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:47:32,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:47:32,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (1/1) ... [2024-09-21 11:47:32,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:47:32,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:47:32,334 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) [2024-09-21 11:47:32,336 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 [2024-09-21 11:47:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:47:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-21 11:47:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 11:47:32,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 11:47:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:47:32,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:47:32,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:47:32,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:47:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:47:32,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:47:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:47:32,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:47:32,428 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:47:32,431 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:47:32,574 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:47:32,575 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:47:32,593 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:47:32,594 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 11:47:32,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:47:32 BoogieIcfgContainer [2024-09-21 11:47:32,595 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:47:32,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:47:32,597 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:47:32,599 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:47:32,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:47:32" (1/3) ... [2024-09-21 11:47:32,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d089577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:47:32, skipping insertion in model container [2024-09-21 11:47:32,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:47:32" (2/3) ... [2024-09-21 11:47:32,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d089577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:47:32, skipping insertion in model container [2024-09-21 11:47:32,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:47:32" (3/3) ... [2024-09-21 11:47:32,602 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2024-09-21 11:47:32,622 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:47:32,622 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:47:32,662 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:47:32,666 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;@6b9b33bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:47:32,666 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:47:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 11:47:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:47:32,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:47:32,675 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:47:32,675 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:47:32,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:47:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1759225501, now seen corresponding path program 1 times [2024-09-21 11:47:32,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 11:47:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986998419] [2024-09-21 11:47:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:47:32,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-21 11:47:32,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 11:47:32,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-21 11:47:32,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-09-21 11:47:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:47:32,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-09-21 11:47:32,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:47:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:47:32,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:47:32,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 11:47:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986998419] [2024-09-21 11:47:32,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986998419] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:47:32,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:47:32,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:47:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785212868] [2024-09-21 11:47:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:47:32,781 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:47:32,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 11:47:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:47:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:47:32,799 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:47:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:47:32,823 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-09-21 11:47:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:47:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-21 11:47:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:47:32,831 INFO L225 Difference]: With dead ends: 46 [2024-09-21 11:47:32,831 INFO L226 Difference]: Without dead ends: 23 [2024-09-21 11:47:32,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:47:32,837 INFO L434 NwaCegarLoop]: 27 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, 27 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 [2024-09-21 11:47:32,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:47:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-21 11:47:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-21 11:47:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 11:47:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-21 11:47:32,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2024-09-21 11:47:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:47:32,867 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-21 11:47:32,867 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:47:32,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:47:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-21 11:47:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-21 11:47:32,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:47:32,869 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:47:32,873 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-09-21 11:47:33,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-21 11:47:33,070 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:47:33,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:47:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1077379671, now seen corresponding path program 1 times [2024-09-21 11:47:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 11:47:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238766862] [2024-09-21 11:47:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:47:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-21 11:47:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 11:47:33,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-21 11:47:33,075 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-09-21 11:47:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:47:33,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:47:33,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:47:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:47:33,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:47:33,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-21 11:47:33,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238766862] [2024-09-21 11:47:33,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238766862] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:47:33,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:47:33,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 11:47:33,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340495034] [2024-09-21 11:47:33,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:47:33,575 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 11:47:33,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-21 11:47:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 11:47:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-21 11:47:33,578 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:47:33,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:47:33,919 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-09-21 11:47:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:47:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-21 11:47:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:47:33,924 INFO L225 Difference]: With dead ends: 39 [2024-09-21 11:47:33,924 INFO L226 Difference]: Without dead ends: 32 [2024-09-21 11:47:33,925 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:47:33,925 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:47:33,926 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 80 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 11:47:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-21 11:47:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-21 11:47:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:47:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-09-21 11:47:33,936 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2024-09-21 11:47:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:47:33,937 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-09-21 11:47:33,937 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-21 11:47:33,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:47:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-09-21 11:47:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-21 11:47:33,938 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:47:33,938 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:47:33,946 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-09-21 11:47:34,139 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-21 11:47:34,140 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:47:34,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:47:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1997288540, now seen corresponding path program 1 times [2024-09-21 11:47:34,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-21 11:47:34,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623477812] [2024-09-21 11:47:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:47:34,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-21 11:47:34,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-21 11:47:34,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-21 11:47:34,144 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process