./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/vnew1.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 f1d7dc9d 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/loops-crafted-1/vnew1.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 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --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-f1d7dc9-m [2024-09-20 12:14:12,905 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:14:12,984 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:14:12,988 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:14:12,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:14:13,028 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:14:13,032 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:14:13,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:14:13,033 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:14:13,033 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:14:13,033 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:14:13,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:14:13,034 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:14:13,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:14:13,036 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:14:13,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:14:13,037 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:14:13,037 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:14:13,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:14:13,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:14:13,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:14:13,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:14:13,043 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:14:13,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:14:13,043 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:14:13,043 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:14:13,044 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:14:13,044 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:14:13,044 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:14:13,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:14:13,045 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:14:13,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:14:13,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:14:13,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:14:13,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:14:13,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:14:13,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:14:13,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:14:13,048 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:14:13,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:14:13,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:14:13,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:14:13,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:14:13,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:14:13,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:14:13,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:14:13,334 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:14:13,335 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:14:13,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-20 12:14:14,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:14:14,964 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:14:14,965 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-20 12:14:14,972 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ac89ef7ad/0366c0196494413ba322eb2ec20d903a/FLAG1b1f0717f [2024-09-20 12:14:15,359 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ac89ef7ad/0366c0196494413ba322eb2ec20d903a [2024-09-20 12:14:15,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:14:15,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:14:15,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:14:15,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:14:15,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:14:15,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366a4be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15, skipping insertion in model container [2024-09-20 12:14:15,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,393 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:14:15,529 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/loops-crafted-1/vnew1.c[403,416] [2024-09-20 12:14:15,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:14:15,552 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:14:15,566 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/loops-crafted-1/vnew1.c[403,416] [2024-09-20 12:14:15,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:14:15,599 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:14:15,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15 WrapperNode [2024-09-20 12:14:15,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:14:15,601 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:14:15,601 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:14:15,601 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:14:15,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,615 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,622 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:14:15,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:14:15,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:14:15,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:14:15,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:14:15,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,640 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,663 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-20 12:14:15,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:14:15,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:14:15,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:14:15,681 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:14:15,682 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (1/1) ... [2024-09-20 12:14:15,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:14:15,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:15,719 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 12:14:15,729 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 12:14:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:14:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:14:15,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:14:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:14:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 12:14:15,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:14:15,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:14:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:14:15,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:14:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:14:15,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:14:15,829 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:14:15,831 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:14:15,972 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-20 12:14:15,973 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:14:16,001 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:14:16,001 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:14:16,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:14:16 BoogieIcfgContainer [2024-09-20 12:14:16,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:14:16,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:14:16,005 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:14:16,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:14:16,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:14:15" (1/3) ... [2024-09-20 12:14:16,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ace54f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:14:16, skipping insertion in model container [2024-09-20 12:14:16,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:15" (2/3) ... [2024-09-20 12:14:16,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ace54f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:14:16, skipping insertion in model container [2024-09-20 12:14:16,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:14:16" (3/3) ... [2024-09-20 12:14:16,012 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2024-09-20 12:14:16,029 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:14:16,030 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:14:16,076 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:14:16,082 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;@7c3d5181, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:14:16,083 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:14:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:14:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 12:14:16,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:14:16,095 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:14:16,096 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:14:16,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-20 12:14:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:14:16,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412897672] [2024-09-20 12:14:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:14:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:16,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:16,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:16,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412897672] [2024-09-20 12:14:16,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412897672] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:14:16,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:14:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 12:14:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331569429] [2024-09-20 12:14:16,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:14:16,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 12:14:16,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:14:16,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 12:14:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:14:16,965 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:14:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:14:17,260 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-20 12:14:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 12:14:17,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 12:14:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:14:17,269 INFO L225 Difference]: With dead ends: 46 [2024-09-20 12:14:17,270 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 12:14:17,273 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-09-20 12:14:17,277 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:14:17,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:14:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 12:14:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-20 12:14:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:14:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-20 12:14:17,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-20 12:14:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:14:17,320 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-20 12:14:17,321 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:14:17,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-20 12:14:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 12:14:17,322 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:14:17,322 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:14:17,322 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:14:17,322 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:14:17,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-20 12:14:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:14:17,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289873457] [2024-09-20 12:14:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:17,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:14:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:17,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:17,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:17,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289873457] [2024-09-20 12:14:17,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289873457] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:14:17,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580174608] [2024-09-20 12:14:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:17,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:17,762 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 12:14:17,764 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 12:14:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:17,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:14:17,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:14:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:18,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:14:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:18,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580174608] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:14:18,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:14:18,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2024-09-20 12:14:18,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823801655] [2024-09-20 12:14:18,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:14:18,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:14:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:14:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:14:18,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:14:18,542 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:14:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:14:19,315 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-20 12:14:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 12:14:19,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-09-20 12:14:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:14:19,318 INFO L225 Difference]: With dead ends: 50 [2024-09-20 12:14:19,319 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 12:14:19,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 12:14:19,321 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:14:19,322 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 25 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:14:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 12:14:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2024-09-20 12:14:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:14:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-09-20 12:14:19,344 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 14 [2024-09-20 12:14:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:14:19,346 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-09-20 12:14:19,346 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:14:19,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-09-20 12:14:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 12:14:19,348 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:14:19,349 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:14:19,367 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:14:19,553 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 12:14:19,554 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:14:19,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:19,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1759027392, now seen corresponding path program 2 times [2024-09-20 12:14:19,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:14:19,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500658453] [2024-09-20 12:14:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:14:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:19,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:19,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:19,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500658453] [2024-09-20 12:14:19,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500658453] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:14:19,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134959969] [2024-09-20 12:14:19,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:14:19,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:19,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:19,921 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 12:14:19,924 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 12:14:19,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:14:19,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:14:19,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 12:14:19,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:14:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:20,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:14:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:20,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134959969] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:14:20,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:14:20,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-09-20 12:14:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874926654] [2024-09-20 12:14:20,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:14:20,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 12:14:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:14:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 12:14:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-09-20 12:14:20,594 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:14:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:14:22,232 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-09-20 12:14:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:14:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-20 12:14:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:14:22,236 INFO L225 Difference]: With dead ends: 82 [2024-09-20 12:14:22,236 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 12:14:22,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 12:14:22,238 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 154 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:14:22,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 28 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:14:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 12:14:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2024-09-20 12:14:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 38 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:14:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-09-20 12:14:22,270 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 17 [2024-09-20 12:14:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:14:22,270 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-09-20 12:14:22,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:14:22,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-09-20 12:14:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 12:14:22,273 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:14:22,273 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:14:22,289 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 12:14:22,474 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:22,475 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:14:22,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash 447679010, now seen corresponding path program 1 times [2024-09-20 12:14:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:14:22,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986045825] [2024-09-20 12:14:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:22,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:14:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:22,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:22,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:14:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986045825] [2024-09-20 12:14:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986045825] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:14:22,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547021725] [2024-09-20 12:14:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:22,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:22,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:22,848 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 12:14:22,850 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 12:14:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:22,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 12:14:22,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:14:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:23,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:14:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:23,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547021725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:14:23,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:14:23,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2024-09-20 12:14:23,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847387008] [2024-09-20 12:14:23,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:14:23,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:14:23,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:14:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:14:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:14:23,363 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 12:14:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:14:25,665 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2024-09-20 12:14:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:14:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-09-20 12:14:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:14:25,670 INFO L225 Difference]: With dead ends: 93 [2024-09-20 12:14:25,670 INFO L226 Difference]: Without dead ends: 91 [2024-09-20 12:14:25,671 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:14:25,672 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:14:25,675 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-20 12:14:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-20 12:14:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-09-20 12:14:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 10 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 12:14:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-09-20 12:14:25,746 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 23 [2024-09-20 12:14:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:14:25,747 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-09-20 12:14:25,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 12:14:25,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-09-20 12:14:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:14:25,752 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:14:25,752 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:14:25,768 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 12:14:25,952 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:25,953 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:14:25,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1692277824, now seen corresponding path program 3 times [2024-09-20 12:14:25,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:14:25,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404173303] [2024-09-20 12:14:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:25,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:14:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:26,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:26,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:26,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404173303] [2024-09-20 12:14:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404173303] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:14:26,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281831772] [2024-09-20 12:14:26,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:14:26,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:26,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:26,798 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 12:14:26,799 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 12:14:26,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 12:14:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:14:26,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-20 12:14:26,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:14:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:27,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:14:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:14:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281831772] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:14:28,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:14:28,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2024-09-20 12:14:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020231785] [2024-09-20 12:14:28,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:14:28,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 12:14:28,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:14:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 12:14:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 12:14:28,393 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:14:40,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:14:49,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:14:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:14:49,867 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2024-09-20 12:14:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 12:14:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-09-20 12:14:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:14:49,870 INFO L225 Difference]: With dead ends: 151 [2024-09-20 12:14:49,870 INFO L226 Difference]: Without dead ends: 149 [2024-09-20 12:14:49,873 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1319, Invalid=5821, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 12:14:49,874 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 384 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 173 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:14:49,874 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 76 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1459 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2024-09-20 12:14:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-20 12:14:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 126. [2024-09-20 12:14:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 105 states have internal predecessors, (125), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (20), 11 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-20 12:14:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-09-20 12:14:49,939 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 25 [2024-09-20 12:14:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:14:49,939 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-09-20 12:14:49,939 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:14:49,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-09-20 12:14:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 12:14:49,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:14:49,941 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:14:49,955 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 12:14:50,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:50,142 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:14:50,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:50,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-20 12:14:50,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:14:50,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417784298] [2024-09-20 12:14:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:50,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:14:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:50,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:50,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:14:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:50,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:14:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:14:50,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:50,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417784298] [2024-09-20 12:14:50,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417784298] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:14:50,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558392] [2024-09-20 12:14:50,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:14:50,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:50,491 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 12:14:50,492 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 12:14:50,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:14:50,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:14:50,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 12:14:50,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:14:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:14:50,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:14:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:14:51,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558392] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:14:51,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:14:51,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-09-20 12:14:51,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439273291] [2024-09-20 12:14:51,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:14:51,021 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 12:14:51,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:14:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 12:14:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:14:51,023 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:14:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:14:51,662 INFO L93 Difference]: Finished difference Result 161 states and 204 transitions. [2024-09-20 12:14:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:14:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2024-09-20 12:14:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:14:51,664 INFO L225 Difference]: With dead ends: 161 [2024-09-20 12:14:51,664 INFO L226 Difference]: Without dead ends: 118 [2024-09-20 12:14:51,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:14:51,665 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:14:51,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 31 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:14:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-20 12:14:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-09-20 12:14:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.288888888888889) internal successors, (116), 98 states have internal predecessors, (116), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 11 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 12:14:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2024-09-20 12:14:51,739 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 28 [2024-09-20 12:14:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:14:51,739 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2024-09-20 12:14:51,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:14:51,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2024-09-20 12:14:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:14:51,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:14:51,741 INFO L216 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:14:51,760 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 12:14:51,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 12:14:51,942 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:14:51,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:14:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2066924416, now seen corresponding path program 3 times [2024-09-20 12:14:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:14:51,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959301824] [2024-09-20 12:14:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:14:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:14:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:53,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:14:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:53,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 12:14:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:53,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:14:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:14:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:14:53,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:14:53,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959301824] [2024-09-20 12:14:53,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959301824] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:14:53,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578110551] [2024-09-20 12:14:53,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:14:53,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:14:53,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:14:53,151 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 12:14:53,153 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 12:14:53,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:14:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:14:53,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 12:14:53,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:14:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:14:53,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:15:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578110551] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:23,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:23,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 37 [2024-09-20 12:15:23,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701549563] [2024-09-20 12:15:23,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:23,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 12:15:23,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:23,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 12:15:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1151, Unknown=3, NotChecked=0, Total=1332 [2024-09-20 12:15:23,499 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 12:15:28,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:15:39,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:15:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:39,566 INFO L93 Difference]: Finished difference Result 171 states and 218 transitions. [2024-09-20 12:15:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:15:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-09-20 12:15:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:39,568 INFO L225 Difference]: With dead ends: 171 [2024-09-20 12:15:39,568 INFO L226 Difference]: Without dead ends: 169 [2024-09-20 12:15:39,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=527, Invalid=2891, Unknown=4, NotChecked=0, Total=3422 [2024-09-20 12:15:39,570 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 169 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:39,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 44 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2024-09-20 12:15:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-20 12:15:39,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-09-20 12:15:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 125 states have (on average 1.208) internal successors, (151), 136 states have internal predecessors, (151), 33 states have call successors, (33), 11 states have call predecessors, (33), 10 states have return successors, (32), 21 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-20 12:15:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2024-09-20 12:15:39,648 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 33 [2024-09-20 12:15:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:39,649 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2024-09-20 12:15:39,649 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 12:15:39,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2024-09-20 12:15:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:15:39,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:39,651 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:39,664 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 12:15:39,851 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:39,852 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:39,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2049998720, now seen corresponding path program 4 times [2024-09-20 12:15:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:39,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465797714] [2024-09-20 12:15:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:15:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:15:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:15:41,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:41,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465797714] [2024-09-20 12:15:41,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465797714] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:41,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734142496] [2024-09-20 12:15:41,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:15:41,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:41,155 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 12:15:41,156 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 12:15:41,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:15:41,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:41,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-20 12:15:41,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:15:42,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:15:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734142496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:43,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:43,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 60 [2024-09-20 12:15:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543311913] [2024-09-20 12:15:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:43,501 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-20 12:15:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-20 12:15:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=3000, Unknown=0, NotChecked=0, Total=3540 [2024-09-20 12:15:43,503 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 12:15:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:50,498 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2024-09-20 12:15:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 12:15:50,500 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-09-20 12:15:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:50,502 INFO L225 Difference]: With dead ends: 224 [2024-09-20 12:15:50,502 INFO L226 Difference]: Without dead ends: 222 [2024-09-20 12:15:50,505 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1321, Invalid=6689, Unknown=0, NotChecked=0, Total=8010 [2024-09-20 12:15:50,506 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 282 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:50,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 79 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 12:15:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-20 12:15:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2024-09-20 12:15:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 168 states have internal predecessors, (179), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (45), 30 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-20 12:15:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2024-09-20 12:15:50,616 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 41 [2024-09-20 12:15:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:50,616 INFO L474 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2024-09-20 12:15:50,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 12:15:50,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2024-09-20 12:15:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 12:15:50,619 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:50,619 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:50,637 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 12:15:50,819 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:50,820 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:50,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1054157638, now seen corresponding path program 5 times [2024-09-20 12:15:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:50,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246286688] [2024-09-20 12:15:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:15:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:15:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:15:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:15:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:15:51,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:51,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246286688] [2024-09-20 12:15:51,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246286688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:51,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128641743] [2024-09-20 12:15:51,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:15:51,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:51,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:51,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:51,500 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:15:51,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 12:15:51,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:51,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 12:15:51,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:15:51,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:15:52,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128641743] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:52,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:52,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2024-09-20 12:15:52,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497618927] [2024-09-20 12:15:52,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:52,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 12:15:52,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:52,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 12:15:52,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 12:15:52,966 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 12:16:00,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:16:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:01,268 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2024-09-20 12:16:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:16:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 44 [2024-09-20 12:16:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:01,271 INFO L225 Difference]: With dead ends: 253 [2024-09-20 12:16:01,271 INFO L226 Difference]: Without dead ends: 224 [2024-09-20 12:16:01,273 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2024-09-20 12:16:01,273 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:01,274 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 80 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-20 12:16:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-20 12:16:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2024-09-20 12:16:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 160 states have (on average 1.15625) internal successors, (185), 174 states have internal predecessors, (185), 48 states have call successors, (48), 14 states have call predecessors, (48), 13 states have return successors, (47), 33 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 12:16:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 280 transitions. [2024-09-20 12:16:01,367 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 280 transitions. Word has length 44 [2024-09-20 12:16:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:01,367 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 280 transitions. [2024-09-20 12:16:01,367 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 12:16:01,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 280 transitions. [2024-09-20 12:16:01,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 12:16:01,369 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:01,369 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:01,388 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:01,569 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:01,570 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:01,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-20 12:16:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272067187] [2024-09-20 12:16:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:02,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:02,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:16:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:02,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:16:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:02,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:16:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:16:02,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:02,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272067187] [2024-09-20 12:16:02,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272067187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:02,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824779310] [2024-09-20 12:16:02,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:16:02,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:02,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:02,361 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:16:02,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-20 12:16:02,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:02,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 12:16:02,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:16:03,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:16:03,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824779310] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:03,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:03,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 17] total 49 [2024-09-20 12:16:03,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264624941] [2024-09-20 12:16:03,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:03,816 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-20 12:16:03,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:03,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-20 12:16:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1994, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 12:16:03,817 INFO L87 Difference]: Start difference. First operand 222 states and 280 transitions. Second operand has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-20 12:16:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:06,911 INFO L93 Difference]: Finished difference Result 256 states and 320 transitions. [2024-09-20 12:16:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:16:06,911 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 43 [2024-09-20 12:16:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:06,913 INFO L225 Difference]: With dead ends: 256 [2024-09-20 12:16:06,913 INFO L226 Difference]: Without dead ends: 254 [2024-09-20 12:16:06,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 12:16:06,916 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 144 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:06,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 74 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:16:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-20 12:16:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 241. [2024-09-20 12:16:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 187 states have internal predecessors, (198), 53 states have call successors, (53), 15 states have call predecessors, (53), 14 states have return successors, (52), 38 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-20 12:16:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 303 transitions. [2024-09-20 12:16:07,020 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 303 transitions. Word has length 43 [2024-09-20 12:16:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:07,020 INFO L474 AbstractCegarLoop]: Abstraction has 241 states and 303 transitions. [2024-09-20 12:16:07,020 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-20 12:16:07,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 303 transitions. [2024-09-20 12:16:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 12:16:07,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:07,022 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:07,036 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:07,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 12:16:07,223 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:07,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash -123973150, now seen corresponding path program 7 times [2024-09-20 12:16:07,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:07,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810352820] [2024-09-20 12:16:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:08,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:08,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 12:16:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:08,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:16:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:08,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:16:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:08,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:16:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:08,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:16:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:16:08,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:08,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810352820] [2024-09-20 12:16:08,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810352820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:08,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092622572] [2024-09-20 12:16:08,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:16:08,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:08,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:08,861 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:08,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:16:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:09,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 12:16:09,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:16:09,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:16:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092622572] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:10,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:10,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 45 [2024-09-20 12:16:10,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800548340] [2024-09-20 12:16:10,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:10,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 12:16:10,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:10,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 12:16:10,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 12:16:10,295 INFO L87 Difference]: Start difference. First operand 241 states and 303 transitions. Second operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-20 12:16:18,689 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 65 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:16:26,906 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 54 DAG size of output: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:16:35,006 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 35 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:16:43,199 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:16:51,714 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 29 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:17:01,161 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:17:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:01,445 INFO L93 Difference]: Finished difference Result 295 states and 357 transitions. [2024-09-20 12:17:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:17:01,445 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 53 [2024-09-20 12:17:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:01,447 INFO L225 Difference]: With dead ends: 295 [2024-09-20 12:17:01,447 INFO L226 Difference]: Without dead ends: 239 [2024-09-20 12:17:01,449 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=613, Invalid=4643, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 12:17:01,450 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 122 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:01,450 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 77 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 12:17:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-20 12:17:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2024-09-20 12:17:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 185 states have internal predecessors, (195), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 34 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 12:17:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 290 transitions. [2024-09-20 12:17:01,551 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 290 transitions. Word has length 53 [2024-09-20 12:17:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:01,551 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 290 transitions. [2024-09-20 12:17:01,551 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-20 12:17:01,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 290 transitions. [2024-09-20 12:17:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 12:17:01,553 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:01,553 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:01,571 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 12:17:01,754 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 12:17:01,754 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:01,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash -978711902, now seen corresponding path program 8 times [2024-09-20 12:17:01,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:01,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292884958] [2024-09-20 12:17:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:03,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:03,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:17:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:03,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:17:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:03,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:17:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:03,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:17:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:03,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 12:17:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:17:03,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292884958] [2024-09-20 12:17:03,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292884958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:03,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214913976] [2024-09-20 12:17:03,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:17:03,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:03,259 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:03,260 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:17:03,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:17:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:03,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:17:03,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:17:04,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:17:05,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214913976] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:05,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:05,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 51 [2024-09-20 12:17:05,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549622409] [2024-09-20 12:17:05,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:05,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 12:17:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 12:17:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 12:17:05,020 INFO L87 Difference]: Start difference. First operand 238 states and 290 transitions. Second operand has 51 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 20 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-20 12:17:11,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:17:21,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:17:33,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:17:37,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:18:14,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []