./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:24:15,459 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:24:15,536 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:24:15,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:24:15,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:24:15,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:24:15,574 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:24:15,575 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:24:15,576 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:24:15,576 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:24:15,577 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:24:15,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:24:15,580 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:24:15,581 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:24:15,581 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:24:15,581 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:24:15,582 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:24:15,582 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:24:15,583 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:24:15,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:24:15,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:24:15,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:24:15,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:24:15,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:24:15,586 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:24:15,587 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:24:15,587 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:24:15,587 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:24:15,588 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:24:15,588 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:24:15,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:24:15,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:24:15,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:24:15,592 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:24:15,593 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:24:15,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:24:15,602 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:24:15,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:24:15,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:24:15,603 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:24:15,603 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:24:15,604 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:24:15,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:24:15,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:24:15,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:24:15,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:24:15,966 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:24:15,967 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:24:15,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2024-09-12 16:24:17,462 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:24:17,649 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:24:17,650 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2024-09-12 16:24:17,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/fafcaaa21/8768e094ac3c4a06ad5f2cd70965ad66/FLAGcba962eca [2024-09-12 16:24:18,027 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/fafcaaa21/8768e094ac3c4a06ad5f2cd70965ad66 [2024-09-12 16:24:18,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:24:18,030 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:24:18,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:24:18,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:24:18,036 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:24:18,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ec60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18, skipping insertion in model container [2024-09-12 16:24:18,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,054 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:24:18,178 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2024-09-12 16:24:18,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:24:18,208 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:24:18,219 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2024-09-12 16:24:18,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:24:18,250 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:24:18,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18 WrapperNode [2024-09-12 16:24:18,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:24:18,252 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:24:18,252 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:24:18,252 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:24:18,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,270 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:24:18,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:24:18,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:24:18,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:24:18,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:24:18,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,300 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]. [2024-09-12 16:24:18,304 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,304 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,311 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:24:18,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:24:18,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:24:18,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:24:18,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (1/1) ... [2024-09-12 16:24:18,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:24:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:24:18,368 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) [2024-09-12 16:24:18,371 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 [2024-09-12 16:24:18,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:24:18,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 16:24:18,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 16:24:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:24:18,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:24:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:24:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:24:18,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:24:18,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:24:18,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:24:18,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:24:18,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:24:18,479 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:24:18,481 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:24:18,624 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 16:24:18,624 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:24:18,651 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:24:18,652 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 16:24:18,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:24:18 BoogieIcfgContainer [2024-09-12 16:24:18,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:24:18,654 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:24:18,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:24:18,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:24:18,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:24:18" (1/3) ... [2024-09-12 16:24:18,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3b6fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:24:18, skipping insertion in model container [2024-09-12 16:24:18,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:24:18" (2/3) ... [2024-09-12 16:24:18,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3b6fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:24:18, skipping insertion in model container [2024-09-12 16:24:18,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:24:18" (3/3) ... [2024-09-12 16:24:18,662 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.c [2024-09-12 16:24:18,677 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:24:18,677 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:24:18,725 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:24:18,731 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;@3e51a8b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:24:18,731 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:24:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 16:24:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 16:24:18,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:24:18,743 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:24:18,744 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:24:18,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:18,749 INFO L85 PathProgramCache]: Analyzing trace with hash -620791457, now seen corresponding path program 1 times [2024-09-12 16:24:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:24:18,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54708577] [2024-09-12 16:24:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:18,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:24:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:24:18,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:24:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:24:18,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:24:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:24:18,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:24:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:24:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:24:18,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:24:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54708577] [2024-09-12 16:24:18,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54708577] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:24:18,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:24:18,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 16:24:18,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296903023] [2024-09-12 16:24:18,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:24:18,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 16:24:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:24:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 16:24:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:24:18,991 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:24:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:24:19,017 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2024-09-12 16:24:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 16:24:19,019 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-12 16:24:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:24:19,026 INFO L225 Difference]: With dead ends: 48 [2024-09-12 16:24:19,026 INFO L226 Difference]: Without dead ends: 23 [2024-09-12 16:24:19,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 16:24:19,031 INFO L434 NwaCegarLoop]: 28 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, 28 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 [2024-09-12 16:24:19,032 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:24:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-12 16:24:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-12 16:24:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 16:24:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-12 16:24:19,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2024-09-12 16:24:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:24:19,067 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-12 16:24:19,067 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:24:19,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-12 16:24:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 16:24:19,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:24:19,069 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:24:19,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:24:19,070 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:24:19,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash -959298087, now seen corresponding path program 1 times [2024-09-12 16:24:19,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:24:19,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394220953] [2024-09-12 16:24:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:24:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:24:19,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669126392] [2024-09-12 16:24:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:19,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:24:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:24:19,114 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) [2024-09-12 16:24:19,117 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:24:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:24:19,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 16:24:19,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:24:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:24:19,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:24:19,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:24:19,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394220953] [2024-09-12 16:24:19,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:24:19,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669126392] [2024-09-12 16:24:19,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669126392] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:24:19,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:24:19,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:24:19,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721577998] [2024-09-12 16:24:19,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:24:19,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:24:19,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:24:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:24:19,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:24:19,344 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:24:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:24:19,413 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-09-12 16:24:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:24:19,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-09-12 16:24:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:24:19,415 INFO L225 Difference]: With dead ends: 34 [2024-09-12 16:24:19,416 INFO L226 Difference]: Without dead ends: 30 [2024-09-12 16:24:19,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:24:19,418 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:24:19,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 77 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:24:19,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-12 16:24:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-12 16:24:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:24:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-12 16:24:19,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2024-09-12 16:24:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:24:19,435 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-12 16:24:19,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:24:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-12 16:24:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 16:24:19,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:24:19,437 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:24:19,454 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:24:19,637 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 [2024-09-12 16:24:19,638 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:24:19,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:19,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1544704875, now seen corresponding path program 1 times [2024-09-12 16:24:19,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:24:19,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291755421] [2024-09-12 16:24:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:19,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:24:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:24:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224622192] [2024-09-12 16:24:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:19,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:24:19,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:24:19,673 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) [2024-09-12 16:24:19,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:24:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:24:19,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 16:24:19,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:24:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:24:19,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:24:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 16:24:19,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:24:19,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291755421] [2024-09-12 16:24:19,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:24:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224622192] [2024-09-12 16:24:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224622192] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:24:19,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:24:19,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-12 16:24:19,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229975546] [2024-09-12 16:24:19,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:24:19,956 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:24:19,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:24:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:24:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 16:24:19,957 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:24:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:24:20,013 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-09-12 16:24:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:24:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-12 16:24:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:24:20,015 INFO L225 Difference]: With dead ends: 36 [2024-09-12 16:24:20,015 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 16:24:20,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:24:20,016 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:24:20,017 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 73 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:24:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 16:24:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 16:24:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:24:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-09-12 16:24:20,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2024-09-12 16:24:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:24:20,032 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-09-12 16:24:20,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:24:20,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-09-12 16:24:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 16:24:20,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:24:20,036 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:24:20,051 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 16:24:20,236 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 [2024-09-12 16:24:20,236 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:24:20,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash 21814286, now seen corresponding path program 1 times [2024-09-12 16:24:20,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:24:20,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253382930] [2024-09-12 16:24:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:20,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:24:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:24:20,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354469401] [2024-09-12 16:24:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:20,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:24:20,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:24:20,278 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) [2024-09-12 16:24:20,282 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:24:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:24:20,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 16:24:20,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:24:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 16:24:20,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:24:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 16:24:21,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:24:21,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253382930] [2024-09-12 16:24:21,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:24:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354469401] [2024-09-12 16:24:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354469401] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:24:21,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:24:21,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-09-12 16:24:21,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789228889] [2024-09-12 16:24:21,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:24:21,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 16:24:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:24:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 16:24:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-09-12 16:24:21,018 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:24:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:24:21,361 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-09-12 16:24:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:24:21,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2024-09-12 16:24:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:24:21,363 INFO L225 Difference]: With dead ends: 53 [2024-09-12 16:24:21,363 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 16:24:21,364 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-12 16:24:21,364 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:24:21,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 178 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:24:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 16:24:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 16:24:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 16:24:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-09-12 16:24:21,381 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2024-09-12 16:24:21,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:24:21,381 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-09-12 16:24:21,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:24:21,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-09-12 16:24:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 16:24:21,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:24:21,383 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:24:21,400 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 16:24:21,587 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 [2024-09-12 16:24:21,588 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:24:21,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:24:21,588 INFO L85 PathProgramCache]: Analyzing trace with hash -244405920, now seen corresponding path program 2 times [2024-09-12 16:24:21,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:24:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452260756] [2024-09-12 16:24:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:24:21,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:24:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:24:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739628866] [2024-09-12 16:24:21,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:24:21,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:24:21,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:24:21,629 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) [2024-09-12 16:24:21,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:24:21,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:24:21,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:24:21,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-12 16:24:21,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:24:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-12 16:24:22,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:26:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-12 16:26:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:26:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452260756] [2024-09-12 16:26:23,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:26:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739628866] [2024-09-12 16:26:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739628866] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:26:23,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:26:23,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2024-09-12 16:26:23,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831502335] [2024-09-12 16:26:23,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:26:23,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 16:26:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:26:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 16:26:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=588, Unknown=9, NotChecked=0, Total=702 [2024-09-12 16:26:23,859 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 15 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 13 states have call successors, (16) [2024-09-12 16:26:57,788 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:27:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:27:02,055 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2024-09-12 16:27:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 16:27:02,056 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 15 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 13 states have call successors, (16) Word has length 60 [2024-09-12 16:27:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:27:02,058 INFO L225 Difference]: With dead ends: 74 [2024-09-12 16:27:02,058 INFO L226 Difference]: Without dead ends: 66 [2024-09-12 16:27:02,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 127.1s TimeCoverageRelationStatistics Valid=246, Invalid=1304, Unknown=10, NotChecked=0, Total=1560 [2024-09-12 16:27:02,060 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:27:02,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 304 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 16:27:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-12 16:27:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-09-12 16:27:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 16:27:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2024-09-12 16:27:02,088 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 60 [2024-09-12 16:27:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:27:02,088 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2024-09-12 16:27:02,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 15 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 13 states have call successors, (16) [2024-09-12 16:27:02,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:27:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2024-09-12 16:27:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-12 16:27:02,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:27:02,091 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:27:02,108 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 16:27:02,294 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 [2024-09-12 16:27:02,295 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:27:02,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:27:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash -235169010, now seen corresponding path program 3 times [2024-09-12 16:27:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:27:02,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4839568] [2024-09-12 16:27:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:27:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:27:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:27:02,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808859717] [2024-09-12 16:27:02,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:27:02,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:27:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:27:02,392 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) [2024-09-12 16:27:02,393 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:27:02,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 16:27:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:27:02,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-12 16:27:02,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:27:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 45 proven. 142 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-09-12 16:27:02,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:27:10,941 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (+ c_main_~y~0 .cse0) (+ c_main_~c~0 (* c_main_~c~0 c_main_~y~0))) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2024-09-12 16:27:19,022 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:27:31,038 WARN L293 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:27:43,062 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:27:51,081 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~c~0_BEFORE_CALL_26 Int) (v_main_~y~0_BEFORE_CALL_39 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39))) (or (= (+ (* v_main_~y~0_BEFORE_CALL_39 v_main_~c~0_BEFORE_CALL_26) v_main_~c~0_BEFORE_CALL_26) (+ v_main_~y~0_BEFORE_CALL_39 .cse0)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 6) (* v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 10) (* 7 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39) .cse0) 12) 0))))) is different from true [2024-09-12 16:28:03,100 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:28:19,124 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:28:27,141 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~c~0_BEFORE_CALL_26 Int) (v_main_~y~0_BEFORE_CALL_39 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39))) (or (= (+ (* v_main_~y~0_BEFORE_CALL_39 v_main_~c~0_BEFORE_CALL_26) v_main_~c~0_BEFORE_CALL_26) (+ v_main_~y~0_BEFORE_CALL_39 .cse0)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 6) (* v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 10) (* 7 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39 v_main_~y~0_BEFORE_CALL_39) .cse0) 12) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2024-09-12 16:28:39,195 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) .cse0) (+ (* 2 c_main_~c~0) (* c_main_~c~0 c_main_~y~0))) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2024-09-12 16:28:55,254 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (+ (* 3 c_main_~c~0) (* c_main_~c~0 c_main_~y~0)) (+ (* 3 c_main_~y~0) .cse0)) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false