./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.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 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:42:20,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:42:20,510 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:42:20,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:42:20,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:42:20,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:42:20,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:42:20,538 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:42:20,539 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:42:20,539 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:42:20,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:42:20,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:42:20,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:42:20,540 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:42:20,540 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:42:20,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:42:20,541 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:42:20,543 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:42:20,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:42:20,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:42:20,544 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:42:20,544 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:42:20,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:42:20,547 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:42:20,547 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:42:20,547 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:42:20,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:42:20,548 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:42:20,548 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:42:20,548 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:42:20,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:42:20,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:42:20,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:42:20,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:42:20,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:42:20,549 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:42:20,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:42:20,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:42:20,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:42:20,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:42:20,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:42:20,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:42:20,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:42:20,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:42:20,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:42:20,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:42:20,790 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:42:20,790 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:42:20,791 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-20 19:42:22,053 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:42:22,180 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:42:22,180 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-20 19:42:22,185 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2027cdafb/f0a54602b87440e38df9ac8944d49a2a/FLAG6f37d777e [2024-09-20 19:42:22,599 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2027cdafb/f0a54602b87440e38df9ac8944d49a2a [2024-09-20 19:42:22,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:42:22,603 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:42:22,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:42:22,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:42:22,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:42:22,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c336e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22, skipping insertion in model container [2024-09-20 19:42:22,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,627 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:42:22,724 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2024-09-20 19:42:22,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:42:22,744 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:42:22,752 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2024-09-20 19:42:22,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:42:22,770 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:42:22,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22 WrapperNode [2024-09-20 19:42:22,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:42:22,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:42:22,771 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:42:22,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:42:22,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,785 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:42:22,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:42:22,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:42:22,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:42:22,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:42:22,794 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,799 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,814 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 19:42:22,814 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,814 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:42:22,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:42:22,827 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:42:22,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:42:22,828 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (1/1) ... [2024-09-20 19:42:22,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:42:22,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:22,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 19:42:22,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 19:42:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:42:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:42:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:42:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:42:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:42:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:42:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:42:22,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:42:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:42:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:42:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:42:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:42:22,937 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:42:22,938 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:42:23,076 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 19:42:23,076 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:42:23,102 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:42:23,102 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:42:23,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:42:23 BoogieIcfgContainer [2024-09-20 19:42:23,103 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:42:23,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:42:23,105 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:42:23,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:42:23,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:42:22" (1/3) ... [2024-09-20 19:42:23,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543bb6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:42:23, skipping insertion in model container [2024-09-20 19:42:23,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:42:22" (2/3) ... [2024-09-20 19:42:23,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543bb6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:42:23, skipping insertion in model container [2024-09-20 19:42:23,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:42:23" (3/3) ... [2024-09-20 19:42:23,111 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2024-09-20 19:42:23,123 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:42:23,124 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:42:23,169 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:42:23,174 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;@68d9276, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:42:23,174 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:42:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:42:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 19:42:23,182 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:23,182 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:23,183 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:23,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:23,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-20 19:42:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786867296] [2024-09-20 19:42:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:23,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:42:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:23,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:42:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:23,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:42:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:23,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:42:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:23,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786867296] [2024-09-20 19:42:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786867296] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:42:23,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:42:23,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:42:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423389449] [2024-09-20 19:42:23,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:23,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:42:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:42:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:42:23,379 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:42:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:23,408 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-20 19:42:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:42:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-20 19:42:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:23,417 INFO L225 Difference]: With dead ends: 54 [2024-09-20 19:42:23,417 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 19:42:23,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:42:23,424 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:23,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:42:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 19:42:23,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-20 19:42:23,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:42:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-20 19:42:23,471 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-20 19:42:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:23,471 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-20 19:42:23,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:42:23,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-20 19:42:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 19:42:23,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:23,473 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:23,474 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:42:23,474 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:23,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-20 19:42:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:23,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815149370] [2024-09-20 19:42:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:23,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:23,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369879853] [2024-09-20 19:42:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:23,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:23,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:23,534 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:42:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:23,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:42:23,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:23,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:23,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:23,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815149370] [2024-09-20 19:42:23,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:23,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369879853] [2024-09-20 19:42:23,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369879853] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:42:23,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:42:23,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-20 19:42:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78241976] [2024-09-20 19:42:23,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:23,841 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:42:23,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:42:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:42:23,842 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:42:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:23,910 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-20 19:42:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:42:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-20 19:42:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:23,912 INFO L225 Difference]: With dead ends: 37 [2024-09-20 19:42:23,912 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:42:23,913 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:42:23,914 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:23,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:42:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-20 19:42:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:42:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-20 19:42:23,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-20 19:42:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:23,930 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-20 19:42:23,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:42:23,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-20 19:42:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 19:42:23,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:23,933 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:23,945 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 19:42:24,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:24,134 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:24,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-20 19:42:24,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:24,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141207134] [2024-09-20 19:42:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:24,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:42:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:42:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:42:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:42:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:42:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:24,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141207134] [2024-09-20 19:42:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141207134] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:42:24,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:42:24,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 19:42:24,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400486054] [2024-09-20 19:42:24,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:24,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:42:24,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:24,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:42:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:42:24,311 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:24,381 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-20 19:42:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:42:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-20 19:42:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:24,382 INFO L225 Difference]: With dead ends: 42 [2024-09-20 19:42:24,382 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:42:24,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:42:24,384 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:24,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:42:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-20 19:42:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:42:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-20 19:42:24,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-20 19:42:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:24,394 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-20 19:42:24,394 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-20 19:42:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:42:24,395 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:24,395 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-09-20 19:42:24,396 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 19:42:24,396 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:24,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-20 19:42:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:24,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32199293] [2024-09-20 19:42:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:24,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:24,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692236682] [2024-09-20 19:42:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:24,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:24,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:24,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:24,432 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:42:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:24,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:42:24,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:24,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:42:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:26,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32199293] [2024-09-20 19:42:26,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:26,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692236682] [2024-09-20 19:42:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692236682] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:42:26,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:42:26,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-20 19:42:26,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936064154] [2024-09-20 19:42:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:42:26,470 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:42:26,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:42:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:42:26,471 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:26,595 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-20 19:42:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:42:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-20 19:42:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:26,597 INFO L225 Difference]: With dead ends: 45 [2024-09-20 19:42:26,597 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 19:42:26,598 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:42:26,599 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:26,600 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 19:42:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-20 19:42:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:42:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-20 19:42:26,606 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-20 19:42:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:26,606 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-20 19:42:26,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:42:26,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-20 19:42:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:42:26,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:26,608 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-09-20 19:42:26,620 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:42:26,809 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:26,810 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:26,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-20 19:42:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503563855] [2024-09-20 19:42:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:26,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:26,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245275380] [2024-09-20 19:42:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:26,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:26,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:26,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:26,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:42:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:26,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 19:42:26,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:27,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:42:27,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:27,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503563855] [2024-09-20 19:42:27,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:27,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245275380] [2024-09-20 19:42:27,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245275380] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:27,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:42:27,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-20 19:42:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496195402] [2024-09-20 19:42:27,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:27,572 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:42:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:42:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:42:27,573 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:42:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:28,101 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-20 19:42:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:42:28,102 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2024-09-20 19:42:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:28,105 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:42:28,107 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:42:28,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-20 19:42:28,108 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:28,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:42:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:42:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 19:42:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:42:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-20 19:42:28,130 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-20 19:42:28,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:28,131 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-20 19:42:28,131 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:42:28,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-20 19:42:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 19:42:28,132 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:28,133 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2024-09-20 19:42:28,145 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:42:28,336 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:28,338 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-20 19:42:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:28,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038172781] [2024-09-20 19:42:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:28,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:28,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429118881] [2024-09-20 19:42:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:28,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:28,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:28,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:28,359 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:42:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:28,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:42:28,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:42:28,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:42:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038172781] [2024-09-20 19:42:28,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429118881] [2024-09-20 19:42:28,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429118881] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:28,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:42:28,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-20 19:42:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660982644] [2024-09-20 19:42:28,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:28,607 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:42:28,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:42:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:42:28,608 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 19:42:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:28,676 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-20 19:42:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:42:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 42 [2024-09-20 19:42:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:28,677 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:42:28,677 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:42:28,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:42:28,678 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:28,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:42:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:42:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-20 19:42:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:42:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-20 19:42:28,693 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-20 19:42:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:28,693 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-20 19:42:28,693 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 19:42:28,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-20 19:42:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 19:42:28,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:28,694 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:28,708 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:42:28,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:28,894 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:28,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-20 19:42:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992865986] [2024-09-20 19:42:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:28,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:42:28,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851577704] [2024-09-20 19:42:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:28,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:28,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:28,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:28,921 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:42:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:28,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 19:42:28,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:42:29,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:42:38,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992865986] [2024-09-20 19:42:38,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:42:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851577704] [2024-09-20 19:42:38,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851577704] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:38,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:42:38,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-20 19:42:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252378744] [2024-09-20 19:42:38,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:38,625 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 19:42:38,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 19:42:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:42:38,626 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 19:42:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:46,384 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-20 19:42:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:42:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2024-09-20 19:42:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:46,386 INFO L225 Difference]: With dead ends: 90 [2024-09-20 19:42:46,386 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 19:42:46,386 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:42:46,386 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:46,387 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-20 19:42:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 19:42:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-20 19:42:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:42:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-20 19:42:46,406 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-20 19:42:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:46,406 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-20 19:42:46,407 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 19:42:46,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-20 19:42:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 19:42:46,409 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:46,409 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:46,421 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:42:46,612 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:42:46,613 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:46,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-20 19:42:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:46,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296689371] [2024-09-20 19:42:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:42:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:42:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:42:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:42:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:42:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:42:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 19:42:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:42:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 19:42:47,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296689371] [2024-09-20 19:42:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296689371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:42:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849815382] [2024-09-20 19:42:47,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:42:47,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:47,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:47,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:47,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:42:47,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:42:47,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:42:47,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 19:42:47,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:42:47,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 19:42:47,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849815382] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:47,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:42:47,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2024-09-20 19:42:47,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598553227] [2024-09-20 19:42:47,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:47,425 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 19:42:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 19:42:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:42:47,427 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-20 19:42:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:47,639 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-09-20 19:42:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:42:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 63 [2024-09-20 19:42:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:47,641 INFO L225 Difference]: With dead ends: 115 [2024-09-20 19:42:47,641 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 19:42:47,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:42:47,642 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:47,642 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 247 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 19:42:47,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-20 19:42:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:42:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-20 19:42:47,654 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 63 [2024-09-20 19:42:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:47,655 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-20 19:42:47,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-20 19:42:47,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-20 19:42:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 19:42:47,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:42:47,656 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:42:47,672 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:42:47,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:47,857 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:42:47,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash 499200656, now seen corresponding path program 2 times [2024-09-20 19:42:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:42:47,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712154936] [2024-09-20 19:42:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:42:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:42:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:42:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:42:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:42:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:42:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:42:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:42:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 19:42:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:42:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:42:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 19:42:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:42:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712154936] [2024-09-20 19:42:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712154936] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:42:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603833827] [2024-09-20 19:42:48,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:42:48,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:48,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:42:48,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:42:48,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:42:48,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:42:48,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:42:48,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 19:42:48,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:42:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-20 19:42:48,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:42:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 19:42:49,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603833827] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:42:49,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:42:49,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2024-09-20 19:42:49,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418475473] [2024-09-20 19:42:49,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:42:49,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 19:42:49,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:42:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 19:42:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:42:49,322 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 19:42:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:42:49,464 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-20 19:42:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 19:42:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) Word has length 63 [2024-09-20 19:42:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:42:49,465 INFO L225 Difference]: With dead ends: 54 [2024-09-20 19:42:49,465 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:42:49,466 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:42:49,466 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:42:49,466 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 237 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:42:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:42:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:42:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:42:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:42:49,467 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-09-20 19:42:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:42:49,467 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:42:49,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 19:42:49,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:42:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:42:49,467 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:42:49,469 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:42:49,475 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 19:42:49,673 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:42:49,676 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2024-09-20 19:42:49,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:42:51,158 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:42:51,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:42:51 BoogieIcfgContainer [2024-09-20 19:42:51,179 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:42:51,179 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:42:51,179 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:42:51,179 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:42:51,179 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:42:23" (3/4) ... [2024-09-20 19:42:51,181 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:42:51,226 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:42:51,226 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:42:51,226 INFO L158 Benchmark]: Toolchain (without parser) took 28623.68ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 122.4MB in the beginning and 92.9MB in the end (delta: 29.5MB). Peak memory consumption was 72.1MB. Max. memory is 16.1GB. [2024-09-20 19:42:51,227 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 123.7MB. Free memory was 93.2MB in the beginning and 93.1MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:42:51,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.96ms. Allocated memory is still 195.0MB. Free memory was 122.1MB in the beginning and 110.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 19:42:51,227 INFO L158 Benchmark]: Boogie Procedure Inliner took 14.12ms. Allocated memory is still 195.0MB. Free memory was 110.5MB in the beginning and 109.8MB in the end (delta: 676.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:42:51,227 INFO L158 Benchmark]: Boogie Preprocessor took 39.91ms. Allocated memory is still 195.0MB. Free memory was 109.5MB in the beginning and 108.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:42:51,228 INFO L158 Benchmark]: RCFGBuilder took 276.44ms. Allocated memory is still 195.0MB. Free memory was 108.0MB in the beginning and 94.4MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 19:42:51,228 INFO L158 Benchmark]: TraceAbstraction took 28074.25ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 93.8MB in the beginning and 95.0MB in the end (delta: -1.3MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. [2024-09-20 19:42:51,228 INFO L158 Benchmark]: Witness Printer took 47.16ms. Allocated memory is still 234.9MB. Free memory was 95.0MB in the beginning and 92.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:42:51,230 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 123.7MB. Free memory was 93.2MB in the beginning and 93.1MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.96ms. Allocated memory is still 195.0MB. Free memory was 122.1MB in the beginning and 110.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 14.12ms. Allocated memory is still 195.0MB. Free memory was 110.5MB in the beginning and 109.8MB in the end (delta: 676.1kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.91ms. Allocated memory is still 195.0MB. Free memory was 109.5MB in the beginning and 108.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 276.44ms. Allocated memory is still 195.0MB. Free memory was 108.0MB in the beginning and 94.4MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 28074.25ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 93.8MB in the beginning and 95.0MB in the end (delta: -1.3MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. * Witness Printer took 47.16ms. Allocated memory is still 234.9MB. Free memory was 95.0MB in the beginning and 92.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.5s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1272 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1065 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 999 IncrementalHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 207 mSDtfsCounter, 999 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 734 GetRequests, 579 SyntacticMatches, 18 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 15.2s InterpolantComputationTime, 684 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 792 ConstructedInterpolants, 1 QuantifiedInterpolants, 4429 SizeOfPredicates, 12 NumberOfNonLiveVariables, 769 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 646/710 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: 34]: Loop Invariant Derived loop invariant: ((((((((((((z + ((__int128) y * x)) == ((long long) b * a)) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && (1 <= b)) && (a <= 5)) && ((((long long) -1 + b) / 2) == y)) || ((((((z == ((long long) b * a)) && (b <= 5)) && (0 <= a)) && (1 <= b)) && (y == 0)) && (a <= 5))) || (((((((z == 0) && (b == y)) && (0 <= a)) && (1 <= y)) && (a <= 5)) && (a == x)) && (y <= 5))) || ((((((y == 1) && (b <= 5)) && (((__int128) z + x) == ((long long) b * a))) && (0 <= a)) && (1 <= b)) && (a <= 5))) || ((((((((z == 0) && (y == (b / 2))) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && ((b % 2) != 1)) && (1 <= y)) && (a <= 5))) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:42:51,262 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE