./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i --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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/divbin2_valuebound5.i -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 f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 --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-6908dde-m [2024-09-24 23:29:58,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:29:58,395 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:29:58,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:29:58,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:29:58,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:29:58,426 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:29:58,427 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:29:58,428 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:29:58,428 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:29:58,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:29:58,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:29:58,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:29:58,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:29:58,431 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:29:58,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:29:58,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:29:58,435 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:29:58,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:29:58,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:29:58,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:29:58,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:29:58,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:29:58,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:29:58,438 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:29:58,438 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:29:58,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:29:58,438 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:29:58,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:29:58,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:29:58,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:29:58,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:29:58,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:29:58,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:29:58,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:29:58,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:29:58,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:29:58,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:29:58,442 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:29:58,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:29:58,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:29:58,444 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:29:58,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:29:58,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:29:58,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:29:58,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:29:58,715 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:29:58,716 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:29:58,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2024-09-24 23:30:00,070 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:30:00,253 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:30:00,254 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2024-09-24 23:30:00,260 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/df41f0030/669c1a59c1994f9ab6c09affe9d0e507/FLAG92f0c34c5 [2024-09-24 23:30:00,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/df41f0030/669c1a59c1994f9ab6c09affe9d0e507 [2024-09-24 23:30:00,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:30:00,276 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:30:00,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:30:00,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:30:00,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:30:00,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e72c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00, skipping insertion in model container [2024-09-24 23:30:00,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,308 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:30:00,449 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2024-09-24 23:30:00,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:30:00,477 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:30:00,487 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2024-09-24 23:30:00,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:30:00,507 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:30:00,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00 WrapperNode [2024-09-24 23:30:00,508 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:30:00,509 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:30:00,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:30:00,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:30:00,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,527 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,533 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:30:00,533 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:30:00,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:30:00,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:30:00,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:30:00,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,545 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,557 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]. [2024-09-24 23:30:00,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:30:00,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:30:00,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:30:00,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:30:00,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (1/1) ... [2024-09-24 23:30:00,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:30:00,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:00,607 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) [2024-09-24 23:30:00,611 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 [2024-09-24 23:30:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:30:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:30:00,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:30:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:30:00,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:30:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:30:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:30:00,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:30:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:30:00,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:30:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:30:00,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:30:00,727 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:30:00,730 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:30:00,906 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:30:00,907 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:30:00,932 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:30:00,932 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:30:00,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:30:00 BoogieIcfgContainer [2024-09-24 23:30:00,933 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:30:00,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:30:00,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:30:00,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:30:00,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:30:00" (1/3) ... [2024-09-24 23:30:00,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e710ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:30:00, skipping insertion in model container [2024-09-24 23:30:00,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:30:00" (2/3) ... [2024-09-24 23:30:00,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e710ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:30:00, skipping insertion in model container [2024-09-24 23:30:00,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:30:00" (3/3) ... [2024-09-24 23:30:00,947 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2024-09-24 23:30:00,961 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:30:00,961 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:30:01,017 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:30:01,025 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;@796c17f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:30:01,026 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:30:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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) [2024-09-24 23:30:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-24 23:30:01,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:01,040 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:01,041 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:01,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1191872707, now seen corresponding path program 1 times [2024-09-24 23:30:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:01,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330867591] [2024-09-24 23:30:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:01,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:01,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:01,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:30:01,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:01,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330867591] [2024-09-24 23:30:01,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330867591] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:01,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:01,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:30:01,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712515225] [2024-09-24 23:30:01,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:01,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:30:01,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:30:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:30:01,211 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-09-24 23:30:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:01,235 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2024-09-24 23:30:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:30:01,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 17 [2024-09-24 23:30:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:01,244 INFO L225 Difference]: With dead ends: 48 [2024-09-24 23:30:01,244 INFO L226 Difference]: Without dead ends: 24 [2024-09-24 23:30:01,247 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 [2024-09-24 23:30:01,250 INFO L434 NwaCegarLoop]: 29 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, 29 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 [2024-09-24 23:30:01,250 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:30:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-24 23:30:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-24 23:30:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2024-09-24 23:30:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-24 23:30:01,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2024-09-24 23:30:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:01,287 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-24 23:30:01,287 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-24 23:30:01,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-24 23:30:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-24 23:30:01,289 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:01,289 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:01,289 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:30:01,290 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:01,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash 419909300, now seen corresponding path program 1 times [2024-09-24 23:30:01,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:01,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191712977] [2024-09-24 23:30:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:01,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:01,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003516765] [2024-09-24 23:30:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:01,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:01,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:01,362 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) [2024-09-24 23:30:01,363 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:30:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:01,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:30:01,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:30:01,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:30:01,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:01,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191712977] [2024-09-24 23:30:01,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:30:01,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003516765] [2024-09-24 23:30:01,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003516765] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:01,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:01,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:30:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613953038] [2024-09-24 23:30:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:01,537 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:30:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:30:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:30:01,539 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:30:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:01,619 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-09-24 23:30:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:30:01,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-24 23:30:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:01,621 INFO L225 Difference]: With dead ends: 35 [2024-09-24 23:30:01,621 INFO L226 Difference]: Without dead ends: 32 [2024-09-24 23:30:01,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:30:01,623 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:01,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-24 23:30:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-24 23:30:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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) [2024-09-24 23:30:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-24 23:30:01,634 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2024-09-24 23:30:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:01,635 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-24 23:30:01,635 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:30:01,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-24 23:30:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:30:01,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:01,636 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, 1] [2024-09-24 23:30:01,649 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:30:01,838 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 [2024-09-24 23:30:01,839 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:01,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash -53840867, now seen corresponding path program 1 times [2024-09-24 23:30:01,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:01,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182440525] [2024-09-24 23:30:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:02,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:02,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:02,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-24 23:30:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:30:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182440525] [2024-09-24 23:30:02,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182440525] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:30:02,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:30:02,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:30:02,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187087489] [2024-09-24 23:30:02,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:30:02,399 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:30:02,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:02,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:30:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:30:02,402 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:02,437 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-09-24 23:30:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:30:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-24 23:30:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:02,439 INFO L225 Difference]: With dead ends: 56 [2024-09-24 23:30:02,439 INFO L226 Difference]: Without dead ends: 34 [2024-09-24 23:30:02,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:30:02,442 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:02,443 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:30:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-24 23:30:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-24 23:30:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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) [2024-09-24 23:30:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-09-24 23:30:02,453 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 26 [2024-09-24 23:30:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:02,454 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-09-24 23:30:02,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:02,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-09-24 23:30:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 23:30:02,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:02,457 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:02,458 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:30:02,458 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:02,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash -792506632, now seen corresponding path program 1 times [2024-09-24 23:30:02,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:02,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940756590] [2024-09-24 23:30:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:02,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:02,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211663617] [2024-09-24 23:30:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:02,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:02,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:02,500 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) [2024-09-24 23:30:02,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:30:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:02,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:30:02,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:30:03,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:15,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:15,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940756590] [2024-09-24 23:30:15,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:30:15,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211663617] [2024-09-24 23:30:15,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211663617] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:15,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:30:15,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-24 23:30:15,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876369760] [2024-09-24 23:30:15,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:15,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-24 23:30:15,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-24 23:30:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=218, Unknown=3, NotChecked=0, Total=272 [2024-09-24 23:30:15,395 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:15,600 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2024-09-24 23:30:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:30:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-09-24 23:30:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:15,602 INFO L225 Difference]: With dead ends: 44 [2024-09-24 23:30:15,602 INFO L226 Difference]: Without dead ends: 41 [2024-09-24 23:30:15,602 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=57, Invalid=246, Unknown=3, NotChecked=0, Total=306 [2024-09-24 23:30:15,603 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:15,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:30:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-24 23:30:15,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-24 23:30:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-24 23:30:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-09-24 23:30:15,620 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2024-09-24 23:30:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:15,620 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-09-24 23:30:15,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:30:15,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-09-24 23:30:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:30:15,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:15,622 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:15,631 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:30:15,826 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:15,827 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:15,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1699483551, now seen corresponding path program 2 times [2024-09-24 23:30:15,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:15,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385434676] [2024-09-24 23:30:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:15,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:16,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:30:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:16,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:30:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:16,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:30:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:16,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-24 23:30:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:30:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:16,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:16,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385434676] [2024-09-24 23:30:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385434676] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:30:16,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050180648] [2024-09-24 23:30:16,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:30:16,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:16,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:16,261 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) [2024-09-24 23:30:16,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:30:16,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:30:16,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:30:16,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 23:30:16,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:16,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:30:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050180648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:30:16,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:30:16,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2024-09-24 23:30:16,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709681734] [2024-09-24 23:30:16,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:16,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:30:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:30:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:30:16,785 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 23:30:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:30:16,902 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2024-09-24 23:30:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:30:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2024-09-24 23:30:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:30:16,904 INFO L225 Difference]: With dead ends: 79 [2024-09-24 23:30:16,905 INFO L226 Difference]: Without dead ends: 46 [2024-09-24 23:30:16,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:30:16,906 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:30:16,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:30:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-24 23:30:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-09-24 23:30:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-24 23:30:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-09-24 23:30:16,923 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 36 [2024-09-24 23:30:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:30:16,924 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-09-24 23:30:16,924 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-24 23:30:16,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-09-24 23:30:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-24 23:30:16,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:30:16,927 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:30:16,943 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:30:17,127 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:17,129 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:30:17,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:30:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash -125225604, now seen corresponding path program 3 times [2024-09-24 23:30:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:30:17,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448419205] [2024-09-24 23:30:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:30:17,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:30:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:30:17,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949883539] [2024-09-24 23:30:17,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:30:17,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:30:17,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:30:17,188 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) [2024-09-24 23:30:17,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:30:17,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:30:17,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:30:17,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-24 23:30:17,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:30:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:30:18,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:30:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:30:37,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:30:37,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448419205] [2024-09-24 23:30:37,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:30:37,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949883539] [2024-09-24 23:30:37,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949883539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:30:37,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:30:37,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2024-09-24 23:30:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329251452] [2024-09-24 23:30:37,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:30:37,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-24 23:30:37,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:30:37,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-24 23:30:37,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=587, Unknown=2, NotChecked=0, Total=702 [2024-09-24 23:30:37,858 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-24 23:31:58,077 WARN L293 SmtUtils]: Spent 1.31m on a formula simplification that was a NOOP. DAG size: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:32:02,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:32:06,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:32:10,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:32:14,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:32:31,179 WARN L293 SmtUtils]: Spent 16.36s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:32:42,119 WARN L293 SmtUtils]: Spent 9.06s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:33:28,845 WARN L293 SmtUtils]: Spent 45.46s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:33:30,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:33:34,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:33:44,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:33:49,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:33:53,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:34:00,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:34:04,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:34:13,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:34:17,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []