./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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/cohendiv-ll_unwindbound5.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 011044826c7a01c153d09406112c335d599fb158d7a4b72e6a624d5427477c0d --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-ca4ee3d-m [2024-09-20 19:07:10,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:07:10,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:07:10,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:07:10,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:07:10,395 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:07:10,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:07:10,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:07:10,397 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:07:10,398 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:07:10,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:07:10,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:07:10,399 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:07:10,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:07:10,401 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:07:10,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:07:10,401 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:07:10,402 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:07:10,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:07:10,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:07:10,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:07:10,403 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:07:10,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:07:10,405 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:07:10,406 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:07:10,406 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:07:10,406 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:07:10,406 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:07:10,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:07:10,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:07:10,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:07:10,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:07:10,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:10,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:07:10,407 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:07:10,407 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:07:10,407 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:07:10,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:07:10,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:07:10,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:07:10,408 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:07:10,410 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:07:10,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 011044826c7a01c153d09406112c335d599fb158d7a4b72e6a624d5427477c0d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:07:10,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:07:10,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:07:10,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:07:10,653 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:07:10,653 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:07:10,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2024-09-20 19:07:11,952 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:07:12,125 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:07:12,126 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2024-09-20 19:07:12,137 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/cceaddba7/199d7bca605f4ac59b0d1fb2dbdb42a5/FLAG83150fc13 [2024-09-20 19:07:12,520 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/cceaddba7/199d7bca605f4ac59b0d1fb2dbdb42a5 [2024-09-20 19:07:12,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:07:12,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:07:12,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:12,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:07:12,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:07:12,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3856df81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12, skipping insertion in model container [2024-09-20 19:07:12,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,545 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:07:12,660 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/cohendiv-ll_unwindbound5.c[576,589] [2024-09-20 19:07:12,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:12,681 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:07:12,690 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/cohendiv-ll_unwindbound5.c[576,589] [2024-09-20 19:07:12,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:12,713 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:07:12,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12 WrapperNode [2024-09-20 19:07:12,714 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:12,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:12,715 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:07:12,715 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:07:12,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,733 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:07:12,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:12,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:07:12,735 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:07:12,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:07:12,745 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,746 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,762 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]. [2024-09-20 19:07:12,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,763 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,770 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,774 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:07:12,776 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:07:12,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:07:12,776 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:07:12,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (1/1) ... [2024-09-20 19:07:12,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:12,807 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) [2024-09-20 19:07:12,816 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 [2024-09-20 19:07:12,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:07:12,848 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:07:12,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:07:12,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:07:12,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:07:12,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:07:12,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:07:12,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:07:12,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:07:12,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:07:12,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:07:12,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:07:12,902 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:07:12,903 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:07:13,036 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 19:07:13,036 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:07:13,051 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:07:13,051 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:07:13,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:13 BoogieIcfgContainer [2024-09-20 19:07:13,052 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:07:13,056 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:07:13,056 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:07:13,059 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:07:13,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:07:12" (1/3) ... [2024-09-20 19:07:13,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d33fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:13, skipping insertion in model container [2024-09-20 19:07:13,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:12" (2/3) ... [2024-09-20 19:07:13,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d33fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:13, skipping insertion in model container [2024-09-20 19:07:13,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:13" (3/3) ... [2024-09-20 19:07:13,062 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound5.c [2024-09-20 19:07:13,075 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:07:13,076 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:07:13,126 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:07:13,134 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;@7f8d7be9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:07:13,134 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:07:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:07:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 19:07:13,146 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:13,147 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:13,147 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:13,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash -166019731, now seen corresponding path program 1 times [2024-09-20 19:07:13,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:13,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236294644] [2024-09-20 19:07:13,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:13,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:13,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:13,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:13,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:13,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236294644] [2024-09-20 19:07:13,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236294644] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:13,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:13,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 19:07:13,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118243992] [2024-09-20 19:07:13,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:13,347 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 19:07:13,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 19:07:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:07:13,379 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:07:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:13,477 INFO L93 Difference]: Finished difference Result 65 states and 98 transitions. [2024-09-20 19:07:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 19:07:13,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 19:07:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:13,484 INFO L225 Difference]: With dead ends: 65 [2024-09-20 19:07:13,484 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 19:07:13,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 19:07:13,488 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:13,489 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 19:07:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-20 19:07:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 19:07:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-20 19:07:13,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 16 [2024-09-20 19:07:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:13,552 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-20 19:07:13,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:07:13,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-20 19:07:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 19:07:13,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:13,554 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:13,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:07:13,554 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:13,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:13,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1899526296, now seen corresponding path program 1 times [2024-09-20 19:07:13,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:13,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232559618] [2024-09-20 19:07:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:13,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:13,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:13,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:13,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232559618] [2024-09-20 19:07:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232559618] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:13,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:13,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127135266] [2024-09-20 19:07:13,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:13,690 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:13,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:13,691 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:13,798 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-09-20 19:07:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:07:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-20 19:07:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:13,799 INFO L225 Difference]: With dead ends: 41 [2024-09-20 19:07:13,799 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 19:07:13,800 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:13,801 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:13,801 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 19:07:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-20 19:07:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 19:07:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-20 19:07:13,808 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2024-09-20 19:07:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:13,808 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-20 19:07:13,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:07:13,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-20 19:07:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 19:07:13,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:13,809 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:13,809 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 19:07:13,810 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:13,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1901015846, now seen corresponding path program 1 times [2024-09-20 19:07:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:13,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142945661] [2024-09-20 19:07:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:13,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259533021] [2024-09-20 19:07:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:13,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:13,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:13,834 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) [2024-09-20 19:07:13,836 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:07:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:13,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:13,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:13,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142945661] [2024-09-20 19:07:13,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259533021] [2024-09-20 19:07:13,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259533021] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:13,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:13,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:13,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840201293] [2024-09-20 19:07:13,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:13,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:13,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:13,939 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-20 19:07:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:13,992 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-20 19:07:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 17 [2024-09-20 19:07:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:13,995 INFO L225 Difference]: With dead ends: 44 [2024-09-20 19:07:13,995 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 19:07:13,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:13,997 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:13,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 19:07:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-09-20 19:07:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:07:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-09-20 19:07:14,008 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 17 [2024-09-20 19:07:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:14,008 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-09-20 19:07:14,008 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-20 19:07:14,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-09-20 19:07:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:07:14,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:14,010 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:14,022 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 19:07:14,210 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:14,211 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1706287866, now seen corresponding path program 1 times [2024-09-20 19:07:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:14,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381166866] [2024-09-20 19:07:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415133076] [2024-09-20 19:07:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:14,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:14,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:14,225 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) [2024-09-20 19:07:14,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:07:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:14,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:14,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:07:14,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:14,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381166866] [2024-09-20 19:07:14,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415133076] [2024-09-20 19:07:14,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415133076] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:14,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:14,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:14,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536194128] [2024-09-20 19:07:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:14,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:14,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:14,319 INFO L87 Difference]: Start difference. First operand 39 states and 48 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, (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) [2024-09-20 19:07:14,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:14,384 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-09-20 19:07:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:14,384 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, (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 22 [2024-09-20 19:07:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:14,386 INFO L225 Difference]: With dead ends: 57 [2024-09-20 19:07:14,386 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 19:07:14,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:14,388 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:14,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 124 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 19:07:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-09-20 19:07:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 19:07:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-09-20 19:07:14,399 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 22 [2024-09-20 19:07:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:14,399 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-09-20 19:07:14,400 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, (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) [2024-09-20 19:07:14,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-09-20 19:07:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 19:07:14,401 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:14,401 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:14,416 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:07:14,605 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 [2024-09-20 19:07:14,606 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:14,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1856957465, now seen corresponding path program 1 times [2024-09-20 19:07:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:14,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033619151] [2024-09-20 19:07:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:14,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782489366] [2024-09-20 19:07:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:14,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:14,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:14,629 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) [2024-09-20 19:07:14,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:07:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:14,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:07:14,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:07:14,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:14,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:14,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033619151] [2024-09-20 19:07:14,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:14,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782489366] [2024-09-20 19:07:14,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782489366] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:14,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:14,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:14,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121818047] [2024-09-20 19:07:14,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:14,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:14,714 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:07:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:14,783 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2024-09-20 19:07:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-09-20 19:07:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:14,785 INFO L225 Difference]: With dead ends: 82 [2024-09-20 19:07:14,785 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 19:07:14,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:07:14,786 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:14,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 19:07:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2024-09-20 19:07:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 45 states have internal predecessors, (55), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 19:07:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2024-09-20 19:07:14,814 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 30 [2024-09-20 19:07:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:14,814 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2024-09-20 19:07:14,815 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:07:14,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2024-09-20 19:07:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 19:07:14,816 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:14,816 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:14,828 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:07:15,019 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 [2024-09-20 19:07:15,019 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:15,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1900127414, now seen corresponding path program 1 times [2024-09-20 19:07:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:15,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539449583] [2024-09-20 19:07:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 19:07:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:07:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:07:15,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:15,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539449583] [2024-09-20 19:07:15,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539449583] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:15,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 19:07:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725397659] [2024-09-20 19:07:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:15,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:07:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:07:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:07:15,203 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 19:07:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:15,323 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2024-09-20 19:07:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:07:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-09-20 19:07:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:15,325 INFO L225 Difference]: With dead ends: 112 [2024-09-20 19:07:15,326 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 19:07:15,326 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:07:15,327 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:15,327 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 19:07:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 19:07:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 19:07:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2024-09-20 19:07:15,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 33 [2024-09-20 19:07:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:15,348 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2024-09-20 19:07:15,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 19:07:15,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2024-09-20 19:07:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 19:07:15,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:15,349 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:15,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 19:07:15,350 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:15,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2073680743, now seen corresponding path program 1 times [2024-09-20 19:07:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394177693] [2024-09-20 19:07:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:15,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 19:07:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:07:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:07:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:07:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:07:15,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:15,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394177693] [2024-09-20 19:07:15,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394177693] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:15,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:15,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 19:07:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942865264] [2024-09-20 19:07:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:15,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 19:07:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 19:07:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:07:15,532 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 19:07:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:15,679 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-20 19:07:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:07:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-09-20 19:07:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:15,685 INFO L225 Difference]: With dead ends: 83 [2024-09-20 19:07:15,685 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 19:07:15,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:07:15,685 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:15,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 19:07:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-20 19:07:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 51 states have internal predecessors, (60), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 19:07:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2024-09-20 19:07:15,702 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 40 [2024-09-20 19:07:15,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:15,702 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2024-09-20 19:07:15,702 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 19:07:15,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2024-09-20 19:07:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 19:07:15,705 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:15,705 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:15,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-20 19:07:15,705 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:15,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash -930915559, now seen corresponding path program 1 times [2024-09-20 19:07:15,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:15,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653608061] [2024-09-20 19:07:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:15,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 19:07:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:07:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:07:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:07:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:07:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:07:15,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:15,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653608061] [2024-09-20 19:07:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653608061] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:15,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61903073] [2024-09-20 19:07:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:15,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:15,867 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) [2024-09-20 19:07:15,868 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:07:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:15,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:15,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:07:15,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61903073] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:15,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:07:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-09-20 19:07:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457941846] [2024-09-20 19:07:15,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:15,994 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:07:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:07:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:07:15,995 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:07:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:16,074 INFO L93 Difference]: Finished difference Result 94 states and 120 transitions. [2024-09-20 19:07:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:07:16,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-20 19:07:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:16,076 INFO L225 Difference]: With dead ends: 94 [2024-09-20 19:07:16,076 INFO L226 Difference]: Without dead ends: 92 [2024-09-20 19:07:16,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:07:16,078 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:16,078 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 185 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-20 19:07:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2024-09-20 19:07:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 56 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 19:07:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2024-09-20 19:07:16,097 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 46 [2024-09-20 19:07:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:16,097 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2024-09-20 19:07:16,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:07:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2024-09-20 19:07:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:07:16,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:16,098 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:16,114 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:07:16,299 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:16,299 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:16,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash -872582608, now seen corresponding path program 1 times [2024-09-20 19:07:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907044848] [2024-09-20 19:07:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 19:07:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:07:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:07:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:07:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:07:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:07:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907044848] [2024-09-20 19:07:16,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907044848] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474194640] [2024-09-20 19:07:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:16,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:16,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:16,408 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) [2024-09-20 19:07:16,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:07:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:16,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:07:16,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:07:16,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:07:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:07:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474194640] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:07:16,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:07:16,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2024-09-20 19:07:16,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514906522] [2024-09-20 19:07:16,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:07:16,596 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 19:07:16,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 19:07:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:07:16,597 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 8 states have call successors, (24), 7 states have call predecessors, (24), 5 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 19:07:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:16,831 INFO L93 Difference]: Finished difference Result 198 states and 236 transitions. [2024-09-20 19:07:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:07:16,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 8 states have call successors, (24), 7 states have call predecessors, (24), 5 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 49 [2024-09-20 19:07:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:16,833 INFO L225 Difference]: With dead ends: 198 [2024-09-20 19:07:16,833 INFO L226 Difference]: Without dead ends: 191 [2024-09-20 19:07:16,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:07:16,833 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:16,834 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 135 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-20 19:07:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 177. [2024-09-20 19:07:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 119 states have internal predecessors, (134), 42 states have call successors, (42), 22 states have call predecessors, (42), 21 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-20 19:07:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 214 transitions. [2024-09-20 19:07:16,864 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 214 transitions. Word has length 49 [2024-09-20 19:07:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:16,865 INFO L474 AbstractCegarLoop]: Abstraction has 177 states and 214 transitions. [2024-09-20 19:07:16,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 8 states have call successors, (24), 7 states have call predecessors, (24), 5 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 19:07:16,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 214 transitions. [2024-09-20 19:07:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 19:07:16,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:16,869 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:16,881 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:07:17,069 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:17,070 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:17,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 260253794, now seen corresponding path program 1 times [2024-09-20 19:07:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501473904] [2024-09-20 19:07:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:17,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649357877] [2024-09-20 19:07:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:17,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:17,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:07:17,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:07:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 19:07:17,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 19:07:17,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:07:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 19:07:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501473904] [2024-09-20 19:07:17,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649357877] [2024-09-20 19:07:17,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649357877] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:17,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:07:17,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-09-20 19:07:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499457510] [2024-09-20 19:07:17,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:17,587 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:07:17,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:07:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:07:17,588 INFO L87 Difference]: Start difference. First operand 177 states and 214 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 19:07:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:17,694 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2024-09-20 19:07:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-09-20 19:07:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:17,696 INFO L225 Difference]: With dead ends: 191 [2024-09-20 19:07:17,696 INFO L226 Difference]: Without dead ends: 186 [2024-09-20 19:07:17,697 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:07:17,697 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:17,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-20 19:07:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 178. [2024-09-20 19:07:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 119 states have internal predecessors, (129), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (38), 33 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-20 19:07:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 206 transitions. [2024-09-20 19:07:17,743 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 206 transitions. Word has length 54 [2024-09-20 19:07:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:17,743 INFO L474 AbstractCegarLoop]: Abstraction has 178 states and 206 transitions. [2024-09-20 19:07:17,743 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 19:07:17,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 206 transitions. [2024-09-20 19:07:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 19:07:17,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:17,744 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:17,759 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:07:17,948 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 19:07:17,949 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:17,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1070557628, now seen corresponding path program 1 times [2024-09-20 19:07:17,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:17,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611346083] [2024-09-20 19:07:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:17,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 19:07:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 19:07:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 19:07:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 19:07:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:07:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 19:07:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:07:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 19:07:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 19:07:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-20 19:07:18,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611346083] [2024-09-20 19:07:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611346083] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423246594] [2024-09-20 19:07:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:18,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:18,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:18,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:07:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:07:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:07:18,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-20 19:07:18,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:07:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-20 19:07:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423246594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:07:18,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:07:18,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-20 19:07:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796327326] [2024-09-20 19:07:18,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:07:18,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 19:07:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 19:07:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:07:18,263 INFO L87 Difference]: Start difference. First operand 178 states and 206 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-20 19:07:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:18,414 INFO L93 Difference]: Finished difference Result 190 states and 215 transitions. [2024-09-20 19:07:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:07:18,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 70 [2024-09-20 19:07:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:18,416 INFO L225 Difference]: With dead ends: 190 [2024-09-20 19:07:18,416 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:07:18,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:07:18,417 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:18,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 106 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:07:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:07:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:07:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:07:18,419 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2024-09-20 19:07:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:18,419 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:07:18,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-20 19:07:18,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:07:18,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:07:18,422 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:07:18,436 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 19:07:18,623 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:18,626 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:18,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:07:19,862 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:07:19,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:07:19 BoogieIcfgContainer [2024-09-20 19:07:19,883 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:07:19,884 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:07:19,884 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:07:19,884 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:07:19,885 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:13" (3/4) ... [2024-09-20 19:07:19,886 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:07:19,928 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:07:19,928 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:07:19,928 INFO L158 Benchmark]: Toolchain (without parser) took 7404.94ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 146.9MB in the beginning and 105.8MB in the end (delta: 41.1MB). Peak memory consumption was 76.8MB. Max. memory is 16.1GB. [2024-09-20 19:07:19,929 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 125.8MB. Free memory was 87.5MB in the beginning and 87.4MB in the end (delta: 119.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:07:19,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.95ms. Allocated memory is still 176.2MB. Free memory was 146.2MB in the beginning and 134.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:07:19,929 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.76ms. Allocated memory is still 176.2MB. Free memory was 134.7MB in the beginning and 133.9MB in the end (delta: 734.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:07:19,929 INFO L158 Benchmark]: Boogie Preprocessor took 41.75ms. Allocated memory is still 176.2MB. Free memory was 133.9MB in the beginning and 131.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:19,929 INFO L158 Benchmark]: RCFGBuilder took 278.31ms. Allocated memory is still 176.2MB. Free memory was 131.8MB in the beginning and 118.6MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 19:07:19,930 INFO L158 Benchmark]: TraceAbstraction took 6827.19ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 117.9MB in the beginning and 107.9MB in the end (delta: 10.0MB). Peak memory consumption was 96.3MB. Max. memory is 16.1GB. [2024-09-20 19:07:19,930 INFO L158 Benchmark]: Witness Printer took 44.08ms. Allocated memory is still 211.8MB. Free memory was 107.9MB in the beginning and 105.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:19,932 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 125.8MB. Free memory was 87.5MB in the beginning and 87.4MB in the end (delta: 119.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 189.95ms. Allocated memory is still 176.2MB. Free memory was 146.2MB in the beginning and 134.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.76ms. Allocated memory is still 176.2MB. Free memory was 134.7MB in the beginning and 133.9MB in the end (delta: 734.9kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 41.75ms. Allocated memory is still 176.2MB. Free memory was 133.9MB in the beginning and 131.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 278.31ms. Allocated memory is still 176.2MB. Free memory was 131.8MB in the beginning and 118.6MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 6827.19ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 117.9MB in the beginning and 107.9MB in the end (delta: 10.0MB). Peak memory consumption was 96.3MB. Max. memory is 16.1GB. * Witness Printer took 44.08ms. Allocated memory is still 211.8MB. Free memory was 107.9MB in the beginning and 105.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 269 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 241 mSDsluCounter, 1257 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 926 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 931 IncrementalHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 331 mSDtfsCounter, 931 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 612 GetRequests, 508 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=10, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 39 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 682 NumberOfCodeBlocks, 682 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1741 SizeOfPredicates, 14 NumberOfNonLiveVariables, 817 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 905/967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((1 <= r) && (((((__int128) q * y) + r) + ((__int128) a * y)) == ((__int128) b + x))) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((__int128) q * y) + r) + ((__int128) a * y)) == ((__int128) b + x)) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Requires: (counter == 0) Ensures: ((\old(cond) != 0) && (counter == 0)) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:07:19,945 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE