./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 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_unwindbound100.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 7cdbf1a1c8f20bea42ab4ad35fbada62352deeb8460cfeb3778e870071fb234e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 09:05:42,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:05:42,579 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:05:42,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:05:42,586 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:05:42,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:05:42,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:05:42,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:05:42,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:05:42,610 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:05:42,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:05:42,611 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:05:42,612 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:05:42,613 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:05:42,614 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:05:42,614 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:05:42,614 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:05:42,615 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:05:42,615 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:05:42,615 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:05:42,615 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:05:42,618 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:05:42,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:05:42,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:05:42,619 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:05:42,619 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:05:42,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:05:42,619 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:05:42,620 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:05:42,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:05:42,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:05:42,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:05:42,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:05:42,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:05:42,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:05:42,621 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:05:42,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:05:42,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:05:42,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:05:42,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:05:42,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:05:42,622 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:05:42,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cdbf1a1c8f20bea42ab4ad35fbada62352deeb8460cfeb3778e870071fb234e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:05:42,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:05:42,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:05:42,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:05:42,868 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:05:42,869 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:05:42,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2024-09-13 09:05:44,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:05:44,370 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:05:44,370 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2024-09-13 09:05:44,376 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0380aeea8/4164f4be0c44491da9f348bd6c939cfe/FLAG21104de1c [2024-09-13 09:05:44,394 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0380aeea8/4164f4be0c44491da9f348bd6c939cfe [2024-09-13 09:05:44,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:05:44,398 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:05:44,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:05:44,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:05:44,407 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:05:44,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc4db56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44, skipping insertion in model container [2024-09-13 09:05:44,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,435 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:05:44,553 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c[576,589] [2024-09-13 09:05:44,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:05:44,578 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:05:44,590 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c[576,589] [2024-09-13 09:05:44,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:05:44,609 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:05:44,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44 WrapperNode [2024-09-13 09:05:44,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:05:44,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:05:44,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:05:44,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:05:44,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,628 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:05:44,628 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:05:44,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:05:44,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:05:44,629 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:05:44,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,639 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,657 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]. [2024-09-13 09:05:44,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,668 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,694 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:05:44,696 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:05:44,696 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:05:44,696 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:05:44,697 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (1/1) ... [2024-09-13 09:05:44,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:05:44,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:44,738 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) [2024-09-13 09:05:44,743 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 [2024-09-13 09:05:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:05:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 09:05:44,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 09:05:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:05:44,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:05:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:05:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:05:44,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:05:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:05:44,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:05:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:05:44,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:05:44,853 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:05:44,855 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:05:44,985 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-13 09:05:44,985 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:05:45,000 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:05:45,000 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 09:05:45,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:05:45 BoogieIcfgContainer [2024-09-13 09:05:45,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:05:45,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:05:45,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:05:45,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:05:45,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:05:44" (1/3) ... [2024-09-13 09:05:45,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b298c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:05:45, skipping insertion in model container [2024-09-13 09:05:45,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:05:44" (2/3) ... [2024-09-13 09:05:45,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b298c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:05:45, skipping insertion in model container [2024-09-13 09:05:45,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:05:45" (3/3) ... [2024-09-13 09:05:45,011 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.c [2024-09-13 09:05:45,026 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:05:45,026 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:05:45,074 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:05:45,080 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;@70664691, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:05:45,080 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:05:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 09:05:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 09:05:45,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:45,091 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:45,091 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:45,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -166019731, now seen corresponding path program 1 times [2024-09-13 09:05:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:45,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810555316] [2024-09-13 09:05:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:45,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:45,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:05:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:45,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:05:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:05:45,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:45,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810555316] [2024-09-13 09:05:45,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810555316] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:45,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:05:45,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 09:05:45,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412387295] [2024-09-13 09:05:45,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:45,295 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 09:05:45,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 09:05:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 09:05:45,317 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 09:05:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:45,408 INFO L93 Difference]: Finished difference Result 65 states and 98 transitions. [2024-09-13 09:05:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 09:05:45,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-13 09:05:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:45,421 INFO L225 Difference]: With dead ends: 65 [2024-09-13 09:05:45,421 INFO L226 Difference]: Without dead ends: 33 [2024-09-13 09:05:45,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 09:05:45,426 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:45,427 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:05:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-13 09:05:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-13 09:05:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 09:05:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-13 09:05:45,510 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 16 [2024-09-13 09:05:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:45,514 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-13 09:05:45,514 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 09:05:45,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-13 09:05:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 09:05:45,515 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:45,515 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:45,515 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:05:45,516 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:45,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1899526296, now seen corresponding path program 1 times [2024-09-13 09:05:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:45,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262632764] [2024-09-13 09:05:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:45,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:05:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:45,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:05:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:05:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262632764] [2024-09-13 09:05:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262632764] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:45,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:05:45,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:05:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882773408] [2024-09-13 09:05:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:45,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:05:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:05:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:05:45,739 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:05:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:45,875 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-09-13 09:05:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:05:45,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-13 09:05:45,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:45,877 INFO L225 Difference]: With dead ends: 41 [2024-09-13 09:05:45,877 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 09:05:45,878 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:05:45,879 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:45,879 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:05:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 09:05:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 09:05:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 09:05:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-13 09:05:45,888 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2024-09-13 09:05:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:45,888 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-13 09:05:45,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:05:45,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-13 09:05:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 09:05:45,890 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:45,890 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:45,890 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 09:05:45,890 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:45,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1901015846, now seen corresponding path program 1 times [2024-09-13 09:05:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:45,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237304095] [2024-09-13 09:05:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:45,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:05:45,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156402248] [2024-09-13 09:05:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:45,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:45,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:45,910 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) [2024-09-13 09:05:45,912 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:05:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:45,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:05:45,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:05:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:05:46,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:05:46,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:46,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237304095] [2024-09-13 09:05:46,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:05:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156402248] [2024-09-13 09:05:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156402248] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:46,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:05:46,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:05:46,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547197490] [2024-09-13 09:05:46,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:46,004 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:05:46,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:05:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:05:46,005 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 09:05:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:46,040 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-13 09:05:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:05:46,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-13 09:05:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:46,041 INFO L225 Difference]: With dead ends: 44 [2024-09-13 09:05:46,041 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 09:05:46,042 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:05:46,043 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:46,043 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:05:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 09:05:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-09-13 09:05:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 09:05:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-09-13 09:05:46,051 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 17 [2024-09-13 09:05:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:46,051 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-09-13 09:05:46,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 09:05:46,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-09-13 09:05:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 09:05:46,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:46,053 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:46,066 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 09:05:46,256 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:46,257 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:46,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1706287866, now seen corresponding path program 1 times [2024-09-13 09:05:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136496236] [2024-09-13 09:05:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:05:46,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141618412] [2024-09-13 09:05:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:46,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:46,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:46,282 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) [2024-09-13 09:05:46,283 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:05:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:46,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:05:46,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:05:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:05:46,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:05:46,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:46,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136496236] [2024-09-13 09:05:46,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:05:46,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141618412] [2024-09-13 09:05:46,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141618412] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:46,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:05:46,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:05:46,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068937344] [2024-09-13 09:05:46,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:46,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:05:46,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:05:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:05:46,364 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:05:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:46,419 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-09-13 09:05:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:05:46,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-13 09:05:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:46,421 INFO L225 Difference]: With dead ends: 57 [2024-09-13 09:05:46,421 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 09:05:46,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:05:46,422 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:46,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 124 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:05:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 09:05:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-09-13 09:05:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 09:05:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-09-13 09:05:46,434 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 22 [2024-09-13 09:05:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:46,434 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-09-13 09:05:46,434 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:05:46,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:46,435 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-09-13 09:05:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 09:05:46,435 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:46,436 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:46,452 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 09:05:46,636 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:46,636 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:46,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1856957465, now seen corresponding path program 1 times [2024-09-13 09:05:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335744276] [2024-09-13 09:05:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:05:46,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773072295] [2024-09-13 09:05:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:46,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:46,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:46,688 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) [2024-09-13 09:05:46,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:05:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:46,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 09:05:46,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:05:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:05:46,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:05:46,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:46,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335744276] [2024-09-13 09:05:46,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:05:46,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773072295] [2024-09-13 09:05:46,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773072295] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:46,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:05:46,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:05:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638070986] [2024-09-13 09:05:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:46,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:05:46,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:05:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:05:46,794 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-13 09:05:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:46,885 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2024-09-13 09:05:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:05:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-09-13 09:05:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:46,888 INFO L225 Difference]: With dead ends: 82 [2024-09-13 09:05:46,889 INFO L226 Difference]: Without dead ends: 80 [2024-09-13 09:05:46,890 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:05:46,890 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:46,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:05:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-13 09:05:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2024-09-13 09:05:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 45 states have internal predecessors, (55), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 09:05:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2024-09-13 09:05:46,914 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 30 [2024-09-13 09:05:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:46,914 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2024-09-13 09:05:46,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-13 09:05:46,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2024-09-13 09:05:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 09:05:46,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:46,916 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:46,929 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 09:05:47,116 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:47,117 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:47,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1900127414, now seen corresponding path program 1 times [2024-09-13 09:05:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:47,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408550511] [2024-09-13 09:05:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:05:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:05:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 09:05:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 09:05:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:05:47,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:47,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408550511] [2024-09-13 09:05:47,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408550511] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:47,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:05:47,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-13 09:05:47,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839776528] [2024-09-13 09:05:47,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:47,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 09:05:47,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 09:05:47,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:05:47,260 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 09:05:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:47,352 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2024-09-13 09:05:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:05:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-09-13 09:05:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:47,355 INFO L225 Difference]: With dead ends: 112 [2024-09-13 09:05:47,355 INFO L226 Difference]: Without dead ends: 77 [2024-09-13 09:05:47,356 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-13 09:05:47,356 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:47,356 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:05:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-13 09:05:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-13 09:05:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 09:05:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2024-09-13 09:05:47,375 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 33 [2024-09-13 09:05:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:47,375 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2024-09-13 09:05:47,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 09:05:47,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2024-09-13 09:05:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 09:05:47,376 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:47,377 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:47,377 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-13 09:05:47,377 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:47,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2073680743, now seen corresponding path program 1 times [2024-09-13 09:05:47,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:47,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960310302] [2024-09-13 09:05:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:05:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:05:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 09:05:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 09:05:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:05:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:05:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:05:47,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:47,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960310302] [2024-09-13 09:05:47,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960310302] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:47,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:05:47,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-13 09:05:47,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973763891] [2024-09-13 09:05:47,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:47,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 09:05:47,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:47,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 09:05:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-13 09:05:47,561 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 09:05:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:47,701 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-13 09:05:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 09:05:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-09-13 09:05:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:47,703 INFO L225 Difference]: With dead ends: 83 [2024-09-13 09:05:47,706 INFO L226 Difference]: Without dead ends: 81 [2024-09-13 09:05:47,706 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-13 09:05:47,706 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:47,707 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:05:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-13 09:05:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-13 09:05:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 51 states have internal predecessors, (60), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 09:05:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2024-09-13 09:05:47,723 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 40 [2024-09-13 09:05:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:47,724 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2024-09-13 09:05:47,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 09:05:47,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2024-09-13 09:05:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 09:05:47,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:47,728 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:47,728 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-13 09:05:47,728 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:47,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:47,729 INFO L85 PathProgramCache]: Analyzing trace with hash -930915559, now seen corresponding path program 1 times [2024-09-13 09:05:47,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:47,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780124880] [2024-09-13 09:05:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:47,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:05:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:05:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 09:05:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 09:05:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:05:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:05:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 09:05:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:05:47,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780124880] [2024-09-13 09:05:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780124880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:05:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125488861] [2024-09-13 09:05:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:47,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:47,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:47,861 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) [2024-09-13 09:05:47,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:05:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:47,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:05:47,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:05:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:05:47,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:05:47,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125488861] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:05:47,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:05:47,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-09-13 09:05:47,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035851702] [2024-09-13 09:05:47,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:47,970 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 09:05:47,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:47,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 09:05:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-13 09:05:47,971 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:05:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:48,046 INFO L93 Difference]: Finished difference Result 94 states and 120 transitions. [2024-09-13 09:05:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:05:48,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-13 09:05:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:48,047 INFO L225 Difference]: With dead ends: 94 [2024-09-13 09:05:48,048 INFO L226 Difference]: Without dead ends: 92 [2024-09-13 09:05:48,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-13 09:05:48,049 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:48,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 185 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:05:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-13 09:05:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2024-09-13 09:05:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 56 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-13 09:05:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2024-09-13 09:05:48,065 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 46 [2024-09-13 09:05:48,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:48,065 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2024-09-13 09:05:48,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:05:48,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2024-09-13 09:05:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 09:05:48,067 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:48,067 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:48,081 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:05:48,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:48,272 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:48,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:48,272 INFO L85 PathProgramCache]: Analyzing trace with hash -872582608, now seen corresponding path program 1 times [2024-09-13 09:05:48,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:48,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664944855] [2024-09-13 09:05:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:48,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:05:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:05:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 09:05:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 09:05:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:05:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:05:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 09:05:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:05:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664944855] [2024-09-13 09:05:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664944855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:05:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339800310] [2024-09-13 09:05:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:48,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:48,367 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) [2024-09-13 09:05:48,368 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:05:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:48,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:05:48,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:05:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 09:05:48,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:05:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:05:48,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339800310] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:05:48,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:05:48,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-09-13 09:05:48,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943091416] [2024-09-13 09:05:48,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:05:48,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 09:05:48,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:48,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 09:05:48,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:05:48,533 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-13 09:05:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:48,776 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2024-09-13 09:05:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 09:05:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 49 [2024-09-13 09:05:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:48,778 INFO L225 Difference]: With dead ends: 254 [2024-09-13 09:05:48,778 INFO L226 Difference]: Without dead ends: 247 [2024-09-13 09:05:48,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:05:48,779 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:48,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 148 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:05:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-13 09:05:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 231. [2024-09-13 09:05:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 155 states have internal predecessors, (175), 58 states have call successors, (58), 27 states have call predecessors, (58), 26 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-13 09:05:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 286 transitions. [2024-09-13 09:05:48,805 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 286 transitions. Word has length 49 [2024-09-13 09:05:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:48,805 INFO L474 AbstractCegarLoop]: Abstraction has 231 states and 286 transitions. [2024-09-13 09:05:48,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-13 09:05:48,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 286 transitions. [2024-09-13 09:05:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 09:05:48,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:48,806 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:48,820 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 09:05:49,007 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:49,007 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:49,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 260253794, now seen corresponding path program 1 times [2024-09-13 09:05:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:49,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023016890] [2024-09-13 09:05:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:05:49,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925035003] [2024-09-13 09:05:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:49,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:49,019 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) [2024-09-13 09:05:49,020 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:05:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:49,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-13 09:05:49,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:05:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 09:05:49,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:05:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 09:05:49,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:49,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023016890] [2024-09-13 09:05:49,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:05:49,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925035003] [2024-09-13 09:05:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925035003] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:05:49,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:05:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-09-13 09:05:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732378236] [2024-09-13 09:05:49,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:05:49,530 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:05:49,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:05:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-13 09:05:49,531 INFO L87 Difference]: Start difference. First operand 231 states and 286 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 09:05:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:49,660 INFO L93 Difference]: Finished difference Result 249 states and 303 transitions. [2024-09-13 09:05:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:05:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-09-13 09:05:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:49,662 INFO L225 Difference]: With dead ends: 249 [2024-09-13 09:05:49,662 INFO L226 Difference]: Without dead ends: 243 [2024-09-13 09:05:49,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-13 09:05:49,663 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:49,663 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:05:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-13 09:05:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 178. [2024-09-13 09:05:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 119 states have internal predecessors, (129), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (38), 33 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-13 09:05:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 206 transitions. [2024-09-13 09:05:49,705 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 206 transitions. Word has length 54 [2024-09-13 09:05:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:49,705 INFO L474 AbstractCegarLoop]: Abstraction has 178 states and 206 transitions. [2024-09-13 09:05:49,706 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 09:05:49,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 206 transitions. [2024-09-13 09:05:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-13 09:05:49,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:05:49,709 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:49,722 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 09:05:49,913 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 09:05:49,914 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:05:49,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1070557628, now seen corresponding path program 1 times [2024-09-13 09:05:49,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:05:49,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105359720] [2024-09-13 09:05:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:49,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:05:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:05:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:05:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 09:05:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 09:05:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:05:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:05:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 09:05:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:05:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 09:05:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 09:05:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-13 09:05:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-13 09:05:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:05:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105359720] [2024-09-13 09:05:50,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105359720] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:05:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066941432] [2024-09-13 09:05:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:05:50,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:05:50,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:05:50,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:05:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:05:50,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:05:50,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:05:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-13 09:05:50,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:05:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-13 09:05:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066941432] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:05:50,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:05:50,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-13 09:05:50,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819763778] [2024-09-13 09:05:50,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:05:50,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 09:05:50,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:05:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 09:05:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-13 09:05:50,233 INFO L87 Difference]: Start difference. First operand 178 states and 206 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-13 09:05:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:05:50,383 INFO L93 Difference]: Finished difference Result 190 states and 215 transitions. [2024-09-13 09:05:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 09:05:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 70 [2024-09-13 09:05:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:05:50,384 INFO L225 Difference]: With dead ends: 190 [2024-09-13 09:05:50,384 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 09:05:50,385 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-09-13 09:05:50,385 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:05:50,386 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 116 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:05:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 09:05:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 09:05:50,386 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) [2024-09-13 09:05:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 09:05:50,386 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2024-09-13 09:05:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:05:50,386 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 09:05:50,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-13 09:05:50,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:05:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 09:05:50,387 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 09:05:50,389 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-13 09:05:50,401 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 09:05:50,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:05:50,596 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:05:50,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-13 09:05:51,936 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 09:05:51,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 09:05:51 BoogieIcfgContainer [2024-09-13 09:05:51,957 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 09:05:51,958 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-13 09:05:51,958 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-13 09:05:51,958 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-13 09:05:51,958 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:05:45" (3/4) ... [2024-09-13 09:05:51,963 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-13 09:05:51,965 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-13 09:05:51,965 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-13 09:05:51,965 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-13 09:05:51,965 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-13 09:05:51,972 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2024-09-13 09:05:51,972 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-13 09:05:51,972 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-13 09:05:51,972 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-13 09:05:51,996 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x)) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) [2024-09-13 09:05:51,997 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((1 <= r) && (((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x))) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) [2024-09-13 09:05:52,055 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-13 09:05:52,056 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-13 09:05:52,056 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-13 09:05:52,057 INFO L158 Benchmark]: Toolchain (without parser) took 7658.53ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 76.2MB in the beginning and 189.2MB in the end (delta: -112.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 09:05:52,057 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 146.8MB. Free memory was 97.2MB in the beginning and 97.0MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 09:05:52,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.58ms. Allocated memory is still 146.8MB. Free memory was 76.1MB in the beginning and 64.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-13 09:05:52,057 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.78ms. Allocated memory is still 146.8MB. Free memory was 64.3MB in the beginning and 63.3MB in the end (delta: 939.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 09:05:52,057 INFO L158 Benchmark]: Boogie Preprocessor took 67.02ms. Allocated memory is still 146.8MB. Free memory was 63.3MB in the beginning and 118.5MB in the end (delta: -55.2MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2024-09-13 09:05:52,058 INFO L158 Benchmark]: RCFGBuilder took 304.48ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 118.5MB in the beginning and 173.9MB in the end (delta: -55.4MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2024-09-13 09:05:52,058 INFO L158 Benchmark]: TraceAbstraction took 6955.04ms. Allocated memory was 211.8MB in the beginning and 255.9MB in the end (delta: 44.0MB). Free memory was 172.8MB in the beginning and 193.4MB in the end (delta: -20.5MB). Peak memory consumption was 141.4MB. Max. memory is 16.1GB. [2024-09-13 09:05:52,058 INFO L158 Benchmark]: Witness Printer took 98.58ms. Allocated memory is still 255.9MB. Free memory was 193.4MB in the beginning and 189.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-13 09:05:52,059 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 146.8MB. Free memory was 97.2MB in the beginning and 97.0MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.58ms. Allocated memory is still 146.8MB. Free memory was 76.1MB in the beginning and 64.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.78ms. Allocated memory is still 146.8MB. Free memory was 64.3MB in the beginning and 63.3MB in the end (delta: 939.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.02ms. Allocated memory is still 146.8MB. Free memory was 63.3MB in the beginning and 118.5MB in the end (delta: -55.2MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. * RCFGBuilder took 304.48ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 118.5MB in the beginning and 173.9MB in the end (delta: -55.4MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * TraceAbstraction took 6955.04ms. Allocated memory was 211.8MB in the beginning and 255.9MB in the end (delta: 44.0MB). Free memory was 172.8MB in the beginning and 193.4MB in the end (delta: -20.5MB). Peak memory consumption was 141.4MB. Max. memory is 16.1GB. * Witness Printer took 98.58ms. Allocated memory is still 255.9MB. Free memory was 193.4MB in the beginning and 189.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 312 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 278 mSDsluCounter, 1280 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 949 mSDsCounter, 150 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 968 IncrementalHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 150 mSolverCounterUnsat, 331 mSDtfsCounter, 968 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 615 GetRequests, 510 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=9, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 682 NumberOfCodeBlocks, 682 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1741 SizeOfPredicates, 14 NumberOfNonLiveVariables, 817 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 905/967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((1 <= r) && (((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x))) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((__int128) q * y) + r) + ((__int128) a * y)) == (b + x)) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Requires: (counter == 0) Ensures: ((\old(cond) != 0) && (counter == 0)) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-13 09:05:52,089 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