./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.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_valuebound2.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 95c338a7a91abcfb8302c7314ea1de7bdde280884a10e8d539233a34032b9a5d --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 19:07:13,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:07:14,021 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:07:14,027 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:07:14,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:07:14,053 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:07:14,055 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:07:14,056 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:07:14,056 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:07:14,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:07:14,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:07:14,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:07:14,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:07:14,060 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:07:14,060 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:07:14,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:07:14,061 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:07:14,061 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:07:14,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:07:14,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:07:14,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:07:14,065 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:07:14,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:07:14,066 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:07:14,066 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:07:14,066 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:07:14,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:07:14,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:07:14,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:07:14,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:07:14,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:07:14,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:07:14,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:14,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:07:14,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:07:14,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:07:14,069 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:07:14,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:07:14,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:07:14,070 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:07:14,071 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:07:14,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:07:14,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95c338a7a91abcfb8302c7314ea1de7bdde280884a10e8d539233a34032b9a5d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:07:14,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:07:14,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:07:14,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:07:14,377 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:07:14,378 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:07:14,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2024-09-20 19:07:15,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:07:16,024 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:07:16,025 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2024-09-20 19:07:16,031 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7ea41766b/c4c9deca1ce74b4ba15f682540d86c08/FLAG8391e9d1a [2024-09-20 19:07:16,044 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7ea41766b/c4c9deca1ce74b4ba15f682540d86c08 [2024-09-20 19:07:16,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:07:16,048 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:07:16,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:16,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:07:16,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:07:16,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b924eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16, skipping insertion in model container [2024-09-20 19:07:16,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,075 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:07:16,242 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_valuebound2.c[576,589] [2024-09-20 19:07:16,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:16,282 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:07:16,293 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_valuebound2.c[576,589] [2024-09-20 19:07:16,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:07:16,319 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:07:16,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16 WrapperNode [2024-09-20 19:07:16,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:07:16,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:16,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:07:16,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:07:16,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,340 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:07:16,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:07:16,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:07:16,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:07:16,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:07:16,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,356 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,375 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 19:07:16,376 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,376 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,383 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:07:16,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:07:16,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:07:16,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:07:16,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (1/1) ... [2024-09-20 19:07:16,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:07:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:16,428 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 19:07:16,436 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 19:07:16,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:07:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:07:16,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:07:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:07:16,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:07:16,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:07:16,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:07:16,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:07:16,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:07:16,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:07:16,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:07:16,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:07:16,550 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:07:16,551 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:07:16,709 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 19:07:16,710 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:07:16,734 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:07:16,734 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:07:16,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:16 BoogieIcfgContainer [2024-09-20 19:07:16,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:07:16,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:07:16,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:07:16,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:07:16,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:07:16" (1/3) ... [2024-09-20 19:07:16,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646e904b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:16, skipping insertion in model container [2024-09-20 19:07:16,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:07:16" (2/3) ... [2024-09-20 19:07:16,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646e904b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:07:16, skipping insertion in model container [2024-09-20 19:07:16,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:16" (3/3) ... [2024-09-20 19:07:16,752 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.c [2024-09-20 19:07:16,780 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:07:16,780 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:07:16,837 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:07:16,844 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;@74a9c309, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:07:16,844 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:07:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:07:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 19:07:16,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:16,858 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:16,858 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -381179752, now seen corresponding path program 1 times [2024-09-20 19:07:16,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339055087] [2024-09-20 19:07:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:16,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:07:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:07:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:07:17,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:17,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339055087] [2024-09-20 19:07:17,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339055087] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:17,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:17,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:07:17,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376977585] [2024-09-20 19:07:17,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:17,081 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:07:17,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:07:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:07:17,106 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:07:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:17,142 INFO L93 Difference]: Finished difference Result 68 states and 107 transitions. [2024-09-20 19:07:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:07:17,144 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-20 19:07:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:17,152 INFO L225 Difference]: With dead ends: 68 [2024-09-20 19:07:17,152 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 19:07:17,155 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:07:17,158 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:17,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:07:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 19:07:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 19:07:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:07:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-09-20 19:07:17,206 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 27 [2024-09-20 19:07:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:17,207 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-09-20 19:07:17,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:07:17,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-09-20 19:07:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 19:07:17,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:17,211 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:17,211 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:07:17,211 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:17,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1528397532, now seen corresponding path program 1 times [2024-09-20 19:07:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404296201] [2024-09-20 19:07:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:17,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539308238] [2024-09-20 19:07:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:17,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:17,278 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 19:07:17,279 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 19:07:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:17,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:07:17,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404296201] [2024-09-20 19:07:17,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539308238] [2024-09-20 19:07:17,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539308238] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:17,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:17,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:17,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264826677] [2024-09-20 19:07:17,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:17,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:17,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:17,449 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:07:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:17,538 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-20 19:07:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-20 19:07:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:17,540 INFO L225 Difference]: With dead ends: 44 [2024-09-20 19:07:17,540 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 19:07:17,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 19:07:17,542 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:17,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 139 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 19:07:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-09-20 19:07:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 19:07:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-09-20 19:07:17,563 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 27 [2024-09-20 19:07:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:17,564 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-09-20 19:07:17,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:07:17,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-09-20 19:07:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:07:17,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:17,569 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:17,587 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 19:07:17,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:17,770 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:17,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash -279158019, now seen corresponding path program 1 times [2024-09-20 19:07:17,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:17,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245638851] [2024-09-20 19:07:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:17,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790328056] [2024-09-20 19:07:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:17,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:17,811 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 19:07:17,815 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 19:07:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:17,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:07:17,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:07:18,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:07:18,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245638851] [2024-09-20 19:07:18,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790328056] [2024-09-20 19:07:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790328056] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:18,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:07:18,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 19:07:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330312938] [2024-09-20 19:07:18,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:07:18,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:07:18,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:07:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:07:18,147 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:07:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:18,318 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-09-20 19:07:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:07:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-20 19:07:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:18,320 INFO L225 Difference]: With dead ends: 56 [2024-09-20 19:07:18,320 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 19:07:18,321 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:07:18,322 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:18,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 162 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 19:07:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-09-20 19:07:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:07:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2024-09-20 19:07:18,349 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 32 [2024-09-20 19:07:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:18,350 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2024-09-20 19:07:18,350 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:07:18,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2024-09-20 19:07:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 19:07:18,353 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:18,354 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 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 19:07:18,366 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:07:18,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:18,555 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:18,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2042149491, now seen corresponding path program 1 times [2024-09-20 19:07:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:18,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557550950] [2024-09-20 19:07:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:18,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835932237] [2024-09-20 19:07:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:18,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:18,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:18,592 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 19:07:18,595 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 19:07:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:18,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:07:18,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:07:18,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557550950] [2024-09-20 19:07:18,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835932237] [2024-09-20 19:07:18,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835932237] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:18,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:07:18,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:07:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851681953] [2024-09-20 19:07:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:18,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:07:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:07:18,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:07:18,694 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-20 19:07:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:18,780 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2024-09-20 19:07:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2024-09-20 19:07:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:18,782 INFO L225 Difference]: With dead ends: 78 [2024-09-20 19:07:18,782 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 19:07:18,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 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 19:07:18,784 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:18,785 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 19:07:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-09-20 19:07:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 19:07:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2024-09-20 19:07:18,810 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 39 [2024-09-20 19:07:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:18,810 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2024-09-20 19:07:18,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-20 19:07:18,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2024-09-20 19:07:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:07:18,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:18,812 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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 19:07:18,831 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 19:07:19,014 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:19,014 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:19,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1095671213, now seen corresponding path program 1 times [2024-09-20 19:07:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:19,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550153048] [2024-09-20 19:07:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:19,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:07:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:07:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:07:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:07:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 19:07:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 19:07:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 19:07:19,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:19,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550153048] [2024-09-20 19:07:19,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550153048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:19,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272236346] [2024-09-20 19:07:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:19,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:19,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:19,499 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 19:07:19,500 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 19:07:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:19,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:07:19,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 19:07:19,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:07:19,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272236346] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:07:19,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:07:19,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 19:07:19,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189224776] [2024-09-20 19:07:19,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:19,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:07:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:07:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:07:19,632 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 19:07:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:19,748 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-09-20 19:07:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:07:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2024-09-20 19:07:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:19,751 INFO L225 Difference]: With dead ends: 75 [2024-09-20 19:07:19,751 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 19:07:19,751 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:07:19,752 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:19,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 185 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 19:07:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-20 19:07:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 19:07:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2024-09-20 19:07:19,780 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 49 [2024-09-20 19:07:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:19,781 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2024-09-20 19:07:19,781 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 19:07:19,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2024-09-20 19:07:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:07:19,785 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:19,785 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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 19:07:19,805 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 19:07:19,985 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:19,986 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:19,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:19,986 INFO L85 PathProgramCache]: Analyzing trace with hash 872567173, now seen corresponding path program 1 times [2024-09-20 19:07:19,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:19,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281862254] [2024-09-20 19:07:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:19,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:07:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:07:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:07:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:07:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:07:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:07:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 19:07:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 19:07:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:07:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:07:20,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:20,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281862254] [2024-09-20 19:07:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281862254] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:20,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310985325] [2024-09-20 19:07:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:20,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:20,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:20,184 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 19:07:20,185 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 19:07:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:07:20,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:07:20,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:07:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-20 19:07:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310985325] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:20,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:07:20,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 12 [2024-09-20 19:07:20,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921747973] [2024-09-20 19:07:20,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:20,451 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:07:20,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:07:20,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:07:20,452 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 19:07:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:20,549 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2024-09-20 19:07:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:07:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-09-20 19:07:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:20,551 INFO L225 Difference]: With dead ends: 79 [2024-09-20 19:07:20,551 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 19:07:20,552 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:07:20,552 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:20,553 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 19:07:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 19:07:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 19:07:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-09-20 19:07:20,577 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 55 [2024-09-20 19:07:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:20,578 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-09-20 19:07:20,578 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 19:07:20,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-09-20 19:07:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 19:07:20,583 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:07:20,583 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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, 1] [2024-09-20 19:07:20,603 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 19:07:20,784 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 19:07:20,784 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:07:20,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash 776950322, now seen corresponding path program 1 times [2024-09-20 19:07:20,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:07:20,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456350110] [2024-09-20 19:07:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:20,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:07:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:07:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745294910] [2024-09-20 19:07:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:07:20,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:20,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:07:20,803 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 19:07:20,806 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 19:07:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:07:20,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 19:07:20,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:07:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 19:07:21,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:07:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-20 19:07:21,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:07:21,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456350110] [2024-09-20 19:07:21,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:07:21,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745294910] [2024-09-20 19:07:21,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745294910] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:07:21,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:07:21,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-09-20 19:07:21,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965520764] [2024-09-20 19:07:21,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:07:21,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:07:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:07:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:07:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:07:21,357 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-20 19:07:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:07:21,484 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2024-09-20 19:07:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:07:21,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2024-09-20 19:07:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:07:21,486 INFO L225 Difference]: With dead ends: 77 [2024-09-20 19:07:21,486 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:07:21,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 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 19:07:21,487 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:07:21,488 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 135 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:07:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:07:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:07:21,489 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 19:07:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:07:21,489 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2024-09-20 19:07:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:07:21,489 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:07:21,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-20 19:07:21,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:07:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:07:21,490 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:07:21,492 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:07:21,509 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 19:07:21,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:07:21,697 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:07:21,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:07:22,259 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:07:22,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:07:22 BoogieIcfgContainer [2024-09-20 19:07:22,281 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:07:22,281 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:07:22,281 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:07:22,282 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:07:22,282 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:07:16" (3/4) ... [2024-09-20 19:07:22,284 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:07:22,338 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:07:22,339 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:07:22,339 INFO L158 Benchmark]: Toolchain (without parser) took 6291.67ms. Allocated memory was 180.4MB in the beginning and 222.3MB in the end (delta: 41.9MB). Free memory was 149.2MB in the beginning and 149.1MB in the end (delta: 93.4kB). Peak memory consumption was 41.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:22,340 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory is still 79.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:07:22,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.34ms. Allocated memory is still 180.4MB. Free memory was 149.2MB in the beginning and 136.7MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:07:22,340 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.34ms. Allocated memory is still 180.4MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:07:22,340 INFO L158 Benchmark]: Boogie Preprocessor took 49.41ms. Allocated memory is still 180.4MB. Free memory was 135.6MB in the beginning and 134.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:22,341 INFO L158 Benchmark]: RCFGBuilder took 343.31ms. Allocated memory is still 180.4MB. Free memory was 134.6MB in the beginning and 150.5MB in the end (delta: -15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-09-20 19:07:22,341 INFO L158 Benchmark]: TraceAbstraction took 5544.44ms. Allocated memory was 180.4MB in the beginning and 222.3MB in the end (delta: 41.9MB). Free memory was 150.5MB in the beginning and 151.2MB in the end (delta: -655.1kB). Peak memory consumption was 127.3MB. Max. memory is 16.1GB. [2024-09-20 19:07:22,341 INFO L158 Benchmark]: Witness Printer took 57.62ms. Allocated memory is still 222.3MB. Free memory was 151.2MB in the beginning and 149.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:07:22,343 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory is still 79.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.34ms. Allocated memory is still 180.4MB. Free memory was 149.2MB in the beginning and 136.7MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.34ms. Allocated memory is still 180.4MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.41ms. Allocated memory is still 180.4MB. Free memory was 135.6MB in the beginning and 134.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 343.31ms. Allocated memory is still 180.4MB. Free memory was 134.6MB in the beginning and 150.5MB in the end (delta: -15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5544.44ms. Allocated memory was 180.4MB in the beginning and 222.3MB in the end (delta: 41.9MB). Free memory was 150.5MB in the beginning and 151.2MB in the end (delta: -655.1kB). Peak memory consumption was 127.3MB. Max. memory is 16.1GB. * Witness Printer took 57.62ms. Allocated memory is still 222.3MB. Free memory was 151.2MB in the beginning and 149.1MB 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, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.9s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 77 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61 mSDsluCounter, 951 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 708 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 420 IncrementalHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 243 mSDtfsCounter, 420 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 452 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 555 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 501 ConstructedInterpolants, 0 QuantifiedInterpolants, 1248 SizeOfPredicates, 15 NumberOfNonLiveVariables, 655 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 476/506 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: 47]: Loop Invariant Derived loop invariant: (((((((__int128) q * y) + r) == x) && (1 <= r)) && (((((__int128) q * y) + r) + ((__int128) a * y)) == ((__int128) b + x))) && (1 <= y)) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((__int128) q * y) + r) == x) && (((((__int128) q * y) + r) + ((__int128) a * y)) == ((__int128) b + x))) && (1 <= y)) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 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 19:07:22,371 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