./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --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/loop-crafted/simple_array_index_value_1-1.i -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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --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 11:59:08,549 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 11:59:08,619 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 11:59:08,626 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 11:59:08,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 11:59:08,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 11:59:08,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 11:59:08,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 11:59:08,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 11:59:08,658 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 11:59:08,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 11:59:08,659 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 11:59:08,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 11:59:08,660 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 11:59:08,661 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 11:59:08,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 11:59:08,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 11:59:08,662 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 11:59:08,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 11:59:08,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 11:59:08,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 11:59:08,664 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 11:59:08,664 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 11:59:08,664 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 11:59:08,665 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 11:59:08,665 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 11:59:08,665 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 11:59:08,666 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 11:59:08,666 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 11:59:08,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 11:59:08,667 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 11:59:08,667 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 11:59:08,667 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:59:08,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 11:59:08,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 11:59:08,668 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 11:59:08,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 11:59:08,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 11:59:08,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 11:59:08,670 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 11:59:08,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 11:59:08,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 11:59:08,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 11:59:08,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 11:59:08,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 11:59:08,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 11:59:08,977 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 11:59:08,978 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 11:59:08,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-09-20 11:59:10,446 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 11:59:10,634 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 11:59:10,634 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-09-20 11:59:10,641 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/59eb4dd06/cba3901d2ff941129c9ab8c55806377d/FLAG46c6c21ff [2024-09-20 11:59:10,657 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/59eb4dd06/cba3901d2ff941129c9ab8c55806377d [2024-09-20 11:59:10,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 11:59:10,661 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 11:59:10,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 11:59:10,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 11:59:10,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 11:59:10,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5366ae06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10, skipping insertion in model container [2024-09-20 11:59:10,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,690 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 11:59:10,835 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-09-20 11:59:10,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:59:10,865 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 11:59:10,878 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-09-20 11:59:10,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:59:10,901 INFO L204 MainTranslator]: Completed translation [2024-09-20 11:59:10,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10 WrapperNode [2024-09-20 11:59:10,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 11:59:10,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 11:59:10,905 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 11:59:10,905 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 11:59:10,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,933 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 11:59:10,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 11:59:10,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 11:59:10,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 11:59:10,935 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 11:59:10,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,959 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,973 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-20 11:59:10,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,978 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 11:59:10,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 11:59:10,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 11:59:10,986 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 11:59:10,987 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (1/1) ... [2024-09-20 11:59:10,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:59:11,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:11,032 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 11:59:11,035 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 11:59:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 11:59:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 11:59:11,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 11:59:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 11:59:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 11:59:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 11:59:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 11:59:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 11:59:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 11:59:11,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 11:59:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 11:59:11,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 11:59:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 11:59:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 11:59:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 11:59:11,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 11:59:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 11:59:11,175 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 11:59:11,177 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 11:59:11,371 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 11:59:11,371 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 11:59:11,407 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 11:59:11,407 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 11:59:11,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:59:11 BoogieIcfgContainer [2024-09-20 11:59:11,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 11:59:11,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 11:59:11,410 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 11:59:11,413 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 11:59:11,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:59:10" (1/3) ... [2024-09-20 11:59:11,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a1faa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:59:11, skipping insertion in model container [2024-09-20 11:59:11,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:59:10" (2/3) ... [2024-09-20 11:59:11,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a1faa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:59:11, skipping insertion in model container [2024-09-20 11:59:11,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:59:11" (3/3) ... [2024-09-20 11:59:11,420 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2024-09-20 11:59:11,439 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 11:59:11,439 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 11:59:11,503 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 11:59:11,510 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;@682a29ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 11:59:11,510 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 11:59:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 11:59:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 11:59:11,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:11,523 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:11,524 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:11,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1680342938, now seen corresponding path program 1 times [2024-09-20 11:59:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327903455] [2024-09-20 11:59:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:11,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:11,843 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 11:59:11,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:11,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327903455] [2024-09-20 11:59:11,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327903455] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:59:11,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:59:11,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 11:59:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41776560] [2024-09-20 11:59:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:59:11,851 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 11:59:11,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 11:59:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:59:11,872 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 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 11:59:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:11,928 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2024-09-20 11:59:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 11:59:11,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 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 11:59:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:11,945 INFO L225 Difference]: With dead ends: 48 [2024-09-20 11:59:11,945 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 11:59:11,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:59:11,955 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:11,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:59:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 11:59:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-09-20 11:59:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 11:59:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-20 11:59:11,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2024-09-20 11:59:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:11,998 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-20 11:59:11,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 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 11:59:11,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-20 11:59:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 11:59:12,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:12,001 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:12,001 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 11:59:12,002 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:12,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash -883064150, now seen corresponding path program 1 times [2024-09-20 11:59:12,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:12,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326120192] [2024-09-20 11:59:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:12,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:12,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:12,224 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 11:59:12,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326120192] [2024-09-20 11:59:12,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326120192] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778045574] [2024-09-20 11:59:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:12,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:12,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:12,229 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 11:59:12,232 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 11:59:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:12,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 11:59:12,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:12,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 11:59:12,508 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 11:59:12,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:12,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-09-20 11:59:12,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-09-20 11:59:12,936 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 11:59:12,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778045574] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:12,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:12,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2024-09-20 11:59:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619453758] [2024-09-20 11:59:12,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:12,940 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 11:59:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 11:59:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-20 11:59:12,942 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:13,221 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-09-20 11:59:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 11:59:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 11:59:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:13,226 INFO L225 Difference]: With dead ends: 53 [2024-09-20 11:59:13,226 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 11:59:13,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-20 11:59:13,227 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:13,228 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:59:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 11:59:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-09-20 11:59:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 11:59:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-20 11:59:13,240 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2024-09-20 11:59:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:13,241 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-20 11:59:13,241 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:13,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-20 11:59:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 11:59:13,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:13,243 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:13,261 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 11:59:13,444 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 11:59:13,445 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:13,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash 985465248, now seen corresponding path program 1 times [2024-09-20 11:59:13,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:13,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940438815] [2024-09-20 11:59:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:13,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:13,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 11:59:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 11:59:13,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:13,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940438815] [2024-09-20 11:59:13,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940438815] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:13,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963994921] [2024-09-20 11:59:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:13,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:13,671 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 11:59:13,673 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 11:59:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:13,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 11:59:13,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:13,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 11:59:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:59:13,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:14,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-09-20 11:59:14,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-09-20 11:59:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:59:14,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963994921] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:14,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:14,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2024-09-20 11:59:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918293743] [2024-09-20 11:59:14,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:14,327 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 11:59:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 11:59:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-20 11:59:14,329 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 11:59:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:15,020 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2024-09-20 11:59:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 11:59:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-09-20 11:59:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:15,023 INFO L225 Difference]: With dead ends: 77 [2024-09-20 11:59:15,024 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 11:59:15,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2024-09-20 11:59:15,025 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:15,026 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 155 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:59:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 11:59:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-09-20 11:59:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 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 11:59:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-09-20 11:59:15,054 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 24 [2024-09-20 11:59:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:15,055 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-09-20 11:59:15,056 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 11:59:15,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-09-20 11:59:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 11:59:15,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:15,059 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:15,078 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 11:59:15,263 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 11:59:15,264 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:15,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 494841382, now seen corresponding path program 1 times [2024-09-20 11:59:15,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:15,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025364608] [2024-09-20 11:59:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:15,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:15,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:15,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 11:59:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:15,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 11:59:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 11:59:15,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:15,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025364608] [2024-09-20 11:59:15,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025364608] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:15,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616106976] [2024-09-20 11:59:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:15,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:15,490 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 11:59:15,492 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 11:59:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:15,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 11:59:15,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:15,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 11:59:15,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-09-20 11:59:15,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:15,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-09-20 11:59:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:59:16,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:17,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2024-09-20 11:59:17,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:17,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 880 treesize of output 868 [2024-09-20 11:59:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:59:17,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616106976] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:17,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:17,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 18] total 33 [2024-09-20 11:59:17,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876968169] [2024-09-20 11:59:17,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:17,722 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 11:59:17,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 11:59:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 11:59:17,725 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 32 states have internal predecessors, (61), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 11:59:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:20,438 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2024-09-20 11:59:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 11:59:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 32 states have internal predecessors, (61), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2024-09-20 11:59:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:20,441 INFO L225 Difference]: With dead ends: 116 [2024-09-20 11:59:20,441 INFO L226 Difference]: Without dead ends: 83 [2024-09-20 11:59:20,446 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=570, Invalid=2186, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 11:59:20,447 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:20,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 173 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 11:59:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-20 11:59:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2024-09-20 11:59:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 53 states have internal predecessors, (58), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 11:59:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2024-09-20 11:59:20,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 34 [2024-09-20 11:59:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:20,486 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2024-09-20 11:59:20,486 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 32 states have internal predecessors, (61), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 11:59:20,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2024-09-20 11:59:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 11:59:20,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:20,488 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:20,506 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 11:59:20,692 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 11:59:20,693 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:20,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1913706916, now seen corresponding path program 2 times [2024-09-20 11:59:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:20,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932108033] [2024-09-20 11:59:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:20,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:20,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 11:59:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:20,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 11:59:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:20,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 11:59:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 11:59:20,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:20,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932108033] [2024-09-20 11:59:20,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932108033] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:20,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504149156] [2024-09-20 11:59:20,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:59:20,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:20,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:20,840 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 11:59:20,842 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 11:59:20,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:59:20,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:59:20,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 11:59:20,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:20,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 11:59:20,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-09-20 11:59:20,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:20,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-09-20 11:59:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 11:59:21,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:24,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 147 [2024-09-20 11:59:24,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:24,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1418 treesize of output 1386 [2024-09-20 11:59:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:59:25,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504149156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:25,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:25,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 24] total 44 [2024-09-20 11:59:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247998104] [2024-09-20 11:59:25,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:25,098 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 11:59:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 11:59:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 11:59:25,100 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 44 states, 38 states have (on average 2.0) internal successors, (76), 42 states have internal predecessors, (76), 10 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 11:59:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:40,389 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2024-09-20 11:59:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 11:59:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 2.0) internal successors, (76), 42 states have internal predecessors, (76), 10 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2024-09-20 11:59:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:40,391 INFO L225 Difference]: With dead ends: 154 [2024-09-20 11:59:40,391 INFO L226 Difference]: Without dead ends: 96 [2024-09-20 11:59:40,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=854, Invalid=3702, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 11:59:40,394 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:40,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 216 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 11:59:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-20 11:59:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2024-09-20 11:59:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 11:59:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2024-09-20 11:59:40,430 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 44 [2024-09-20 11:59:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:40,430 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2024-09-20 11:59:40,431 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 2.0) internal successors, (76), 42 states have internal predecessors, (76), 10 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 11:59:40,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2024-09-20 11:59:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 11:59:40,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:40,432 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:40,450 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 11:59:40,633 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 11:59:40,633 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:40,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2139655518, now seen corresponding path program 3 times [2024-09-20 11:59:40,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:40,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977277319] [2024-09-20 11:59:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:40,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:40,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:40,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 11:59:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:40,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 11:59:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:40,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 11:59:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:40,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 11:59:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 11:59:40,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:40,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977277319] [2024-09-20 11:59:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977277319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643542693] [2024-09-20 11:59:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:59:40,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:40,856 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 11:59:40,858 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 11:59:41,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 11:59:41,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:59:41,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 11:59:41,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 11:59:41,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 11:59:41,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643542693] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:41,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:41,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-20 11:59:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809045737] [2024-09-20 11:59:41,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:41,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 11:59:41,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 11:59:41,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2024-09-20 11:59:41,220 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 11:59:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:41,814 INFO L93 Difference]: Finished difference Result 210 states and 256 transitions. [2024-09-20 11:59:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 11:59:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-09-20 11:59:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:41,819 INFO L225 Difference]: With dead ends: 210 [2024-09-20 11:59:41,820 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 11:59:41,820 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2024-09-20 11:59:41,821 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 183 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:41,821 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 168 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 11:59:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 11:59:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2024-09-20 11:59:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.082191780821918) internal successors, (79), 74 states have internal predecessors, (79), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 11:59:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2024-09-20 11:59:41,863 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 54 [2024-09-20 11:59:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:41,863 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2024-09-20 11:59:41,863 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 11:59:41,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2024-09-20 11:59:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 11:59:41,865 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:41,865 INFO L216 NwaCegarLoop]: trace histogram [12, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:41,879 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 11:59:42,066 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 11:59:42,066 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1861535634, now seen corresponding path program 4 times [2024-09-20 11:59:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:42,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860836368] [2024-09-20 11:59:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:42,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:42,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 11:59:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:42,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 11:59:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:42,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 11:59:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:42,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 11:59:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 11:59:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860836368] [2024-09-20 11:59:42,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860836368] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614774153] [2024-09-20 11:59:42,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 11:59:42,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:42,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:42,444 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 11:59:42,446 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 11:59:42,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 11:59:42,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:59:42,722 WARN L260 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-09-20 11:59:42,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:42,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 11:59:42,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-09-20 11:59:42,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:42,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-09-20 11:59:42,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:42,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-09-20 11:59:42,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:42,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-09-20 11:59:42,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:42,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-09-20 11:59:42,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:42,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-09-20 11:59:43,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:43,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-09-20 11:59:43,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:43,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-09-20 11:59:43,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:43,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-09-20 11:59:43,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:43,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-09-20 11:59:43,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:43,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-09-20 11:59:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 6 proven. 121 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 11:59:46,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:00:47,087 WARN L293 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:01:08,318 WARN L293 SmtUtils]: Spent 9.96s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:01:35,584 WARN L293 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:02:13,488 WARN L293 SmtUtils]: Spent 16.77s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:02:13,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 709 treesize of output 701 [2024-09-20 12:02:14,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 12:02:14,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81304002327 treesize of output 81301307159 [2024-09-20 12:02:59,024 WARN L293 SmtUtils]: Spent 44.89s on a formula simplification. DAG size of input: 6909 DAG size of output: 696 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:03:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 73 proven. 60 refuted. 3 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:03:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614774153] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:03:23,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:03:23,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 38] total 77 [2024-09-20 12:03:23,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104271097] [2024-09-20 12:03:23,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:03:23,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-20 12:03:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:03:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-20 12:03:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4945, Unknown=6, NotChecked=0, Total=5852 [2024-09-20 12:03:23,603 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 77 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 75 states have internal predecessors, (112), 12 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11)