./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 27b49876 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-27b4987-m [2024-09-21 11:20:57,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:20:57,273 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:20:57,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:20:57,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:20:57,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:20:57,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:20:57,311 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:20:57,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:20:57,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:20:57,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:20:57,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:20:57,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:20:57,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:20:57,312 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:20:57,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:20:57,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:20:57,313 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:20:57,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:20:57,313 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:20:57,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:20:57,316 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:20:57,317 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:20:57,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:20:57,317 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:20:57,317 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:20:57,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:20:57,317 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:20:57,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:20:57,318 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:20:57,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:20:57,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:20:57,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:20:57,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:20:57,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:20:57,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:20:57,319 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:20:57,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:20:57,320 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:20:57,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:20:57,324 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:20:57,324 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:20:57,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:20:57,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:20:57,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:20:57,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:20:57,520 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:20:57,521 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:20:57,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-09-21 11:20:58,831 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:20:58,978 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:20:58,978 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-09-21 11:20:58,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5f379fea3/ac2cff2259094b048a031bd2daca997b/FLAG8780d78e5 [2024-09-21 11:20:59,388 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5f379fea3/ac2cff2259094b048a031bd2daca997b [2024-09-21 11:20:59,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:20:59,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:20:59,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:20:59,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:20:59,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:20:59,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e7d977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59, skipping insertion in model container [2024-09-21 11:20:59,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,412 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:20:59,533 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] [2024-09-21 11:20:59,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:20:59,556 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:20:59,565 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] [2024-09-21 11:20:59,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:20:59,588 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:20:59,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59 WrapperNode [2024-09-21 11:20:59,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:20:59,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:20:59,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:20:59,590 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:20:59,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,604 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:20:59,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:20:59,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:20:59,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:20:59,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:20:59,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,626 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]. [2024-09-21 11:20:59,626 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,627 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,635 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:20:59,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:20:59,636 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:20:59,636 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:20:59,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (1/1) ... [2024-09-21 11:20:59,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:20:59,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:20:59,667 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) [2024-09-21 11:20:59,678 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 [2024-09-21 11:20:59,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:20:59,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:20:59,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:20:59,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:20:59,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 11:20:59,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 11:20:59,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 11:20:59,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 11:20:59,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:20:59,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:20:59,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:20:59,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:20:59,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 11:20:59,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 11:20:59,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:20:59,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:20:59,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 11:20:59,774 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:20:59,776 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:20:59,916 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:20:59,916 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:20:59,933 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:20:59,934 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 11:20:59,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:20:59 BoogieIcfgContainer [2024-09-21 11:20:59,935 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:20:59,936 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:20:59,938 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:20:59,941 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:20:59,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:20:59" (1/3) ... [2024-09-21 11:20:59,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552b12a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:20:59, skipping insertion in model container [2024-09-21 11:20:59,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:20:59" (2/3) ... [2024-09-21 11:20:59,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552b12a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:20:59, skipping insertion in model container [2024-09-21 11:20:59,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:20:59" (3/3) ... [2024-09-21 11:20:59,944 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2024-09-21 11:20:59,959 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:20:59,959 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:21:00,005 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:21:00,011 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;@6a5a3d28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:21:00,011 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:21:00,014 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) [2024-09-21 11:21:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 11:21:00,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:00,021 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:21:00,021 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:00,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1680342938, now seen corresponding path program 1 times [2024-09-21 11:21:00,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844951339] [2024-09-21 11:21:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:00,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:00,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:21:00,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844951339] [2024-09-21 11:21:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844951339] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:21:00,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:21:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:21:00,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748062280] [2024-09-21 11:21:00,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:21:00,284 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:21:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:21:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:21:00,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:21:00,305 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) [2024-09-21 11:21:00,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:21:00,346 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2024-09-21 11:21:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:21:00,348 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 [2024-09-21 11:21:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:21:00,353 INFO L225 Difference]: With dead ends: 48 [2024-09-21 11:21:00,354 INFO L226 Difference]: Without dead ends: 26 [2024-09-21 11:21:00,356 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 [2024-09-21 11:21:00,358 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 [2024-09-21 11:21:00,359 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] [2024-09-21 11:21:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-21 11:21:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-09-21 11:21:00,385 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) [2024-09-21 11:21:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-21 11:21:00,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2024-09-21 11:21:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:21:00,387 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-21 11:21:00,387 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) [2024-09-21 11:21:00,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-21 11:21:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-21 11:21:00,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:00,389 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:21:00,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:21:00,390 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:00,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash -883064150, now seen corresponding path program 1 times [2024-09-21 11:21:00,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:00,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488216699] [2024-09-21 11:21:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:00,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:00,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:21:00,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488216699] [2024-09-21 11:21:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488216699] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:21:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956907132] [2024-09-21 11:21:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:00,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:21:00,635 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) [2024-09-21 11:21:00,638 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:21:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:00,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-21 11:21:00,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:21:00,750 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 [2024-09-21 11:21:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:21:00,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:21:01,075 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 [2024-09-21 11:21:01,080 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 [2024-09-21 11:21:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:21:01,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956907132] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:21:01,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:21:01,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2024-09-21 11:21:01,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011308223] [2024-09-21 11:21:01,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:21:01,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 11:21:01,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:21:01,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 11:21:01,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-21 11:21:01,116 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) [2024-09-21 11:21:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:21:01,330 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-09-21 11:21:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 11:21:01,332 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 [2024-09-21 11:21:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:21:01,333 INFO L225 Difference]: With dead ends: 53 [2024-09-21 11:21:01,333 INFO L226 Difference]: Without dead ends: 37 [2024-09-21 11:21:01,334 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-21 11:21:01,334 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 [2024-09-21 11:21:01,335 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] [2024-09-21 11:21:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-21 11:21:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-09-21 11:21:01,346 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) [2024-09-21 11:21:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-21 11:21:01,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2024-09-21 11:21:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:21:01,351 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-21 11:21:01,351 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) [2024-09-21 11:21:01,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-21 11:21:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 11:21:01,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:01,352 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] [2024-09-21 11:21:01,365 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:21:01,552 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 [2024-09-21 11:21:01,553 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:01,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:01,554 INFO L85 PathProgramCache]: Analyzing trace with hash 985465248, now seen corresponding path program 1 times [2024-09-21 11:21:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341908012] [2024-09-21 11:21:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:01,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:01,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:01,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:21:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 11:21:01,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341908012] [2024-09-21 11:21:01,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341908012] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:21:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561846132] [2024-09-21 11:21:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:01,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:01,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:21:01,681 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) [2024-09-21 11:21:01,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:21:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:01,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-21 11:21:01,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:21:01,746 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 [2024-09-21 11:21:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:21:01,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:21:02,114 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 [2024-09-21 11:21:02,117 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 [2024-09-21 11:21:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:21:02,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561846132] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:21:02,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:21:02,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2024-09-21 11:21:02,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118488959] [2024-09-21 11:21:02,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:21:02,165 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 11:21:02,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:21:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 11:21:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-21 11:21:02,166 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) [2024-09-21 11:21:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:21:02,647 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2024-09-21 11:21:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 11:21:02,648 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 [2024-09-21 11:21:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:21:02,649 INFO L225 Difference]: With dead ends: 77 [2024-09-21 11:21:02,649 INFO L226 Difference]: Without dead ends: 52 [2024-09-21 11:21:02,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2024-09-21 11:21:02,650 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-21 11:21:02,651 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] [2024-09-21 11:21:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-21 11:21:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-09-21 11:21:02,662 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) [2024-09-21 11:21:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-09-21 11:21:02,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 24 [2024-09-21 11:21:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:21:02,663 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-09-21 11:21:02,663 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) [2024-09-21 11:21:02,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-09-21 11:21:02,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-21 11:21:02,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:02,665 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] [2024-09-21 11:21:02,682 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:21:02,865 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 [2024-09-21 11:21:02,866 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:02,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 494841382, now seen corresponding path program 1 times [2024-09-21 11:21:02,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:02,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420941417] [2024-09-21 11:21:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:02,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:03,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:21:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:03,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:21:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 11:21:03,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:03,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420941417] [2024-09-21 11:21:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420941417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:21:03,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352103233] [2024-09-21 11:21:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:03,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:03,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:21:03,006 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) [2024-09-21 11:21:03,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:21:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:03,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-21 11:21:03,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:21:03,059 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 [2024-09-21 11:21:03,072 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 [2024-09-21 11:21:03,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:03,092 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 [2024-09-21 11:21:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:21:03,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:21:04,523 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 [2024-09-21 11:21:04,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:04,530 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 [2024-09-21 11:21:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:21:04,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352103233] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:21:04,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:21:04,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 18] total 33 [2024-09-21 11:21:04,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288973920] [2024-09-21 11:21:04,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:21:04,653 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-21 11:21:04,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:21:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-21 11:21:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-09-21 11:21:04,655 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) [2024-09-21 11:21:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:21:06,936 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2024-09-21 11:21:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-21 11:21:06,937 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 [2024-09-21 11:21:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:21:06,938 INFO L225 Difference]: With dead ends: 116 [2024-09-21 11:21:06,938 INFO L226 Difference]: Without dead ends: 83 [2024-09-21 11:21:06,939 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=570, Invalid=2186, Unknown=0, NotChecked=0, Total=2756 [2024-09-21 11:21:06,940 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:21:06,940 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 173 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-21 11:21:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-21 11:21:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2024-09-21 11:21:06,969 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) [2024-09-21 11:21:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2024-09-21 11:21:06,972 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 34 [2024-09-21 11:21:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:21:06,974 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2024-09-21 11:21:06,974 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) [2024-09-21 11:21:06,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2024-09-21 11:21:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-21 11:21:06,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:06,975 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] [2024-09-21 11:21:06,990 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 11:21:07,175 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 [2024-09-21 11:21:07,176 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:07,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1913706916, now seen corresponding path program 2 times [2024-09-21 11:21:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280461768] [2024-09-21 11:21:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:07,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:07,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-21 11:21:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:07,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:21:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:07,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:21:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-21 11:21:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280461768] [2024-09-21 11:21:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280461768] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:21:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431038521] [2024-09-21 11:21:07,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:21:07,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:21:07,334 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) [2024-09-21 11:21:07,335 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:21:07,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:21:07,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:21:07,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-21 11:21:07,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:21:07,403 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 [2024-09-21 11:21:07,435 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 [2024-09-21 11:21:07,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:07,482 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 [2024-09-21 11:21:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:21:08,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:21:10,633 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 [2024-09-21 11:21:10,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:10,642 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 [2024-09-21 11:21:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 11:21:10,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431038521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:21:10,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:21:10,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 24] total 44 [2024-09-21 11:21:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771303508] [2024-09-21 11:21:10,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:21:10,856 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-21 11:21:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:21:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-21 11:21:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-21 11:21:10,858 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) [2024-09-21 11:21:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:21:22,070 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2024-09-21 11:21:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-21 11:21:22,071 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 [2024-09-21 11:21:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:21:22,072 INFO L225 Difference]: With dead ends: 154 [2024-09-21 11:21:22,073 INFO L226 Difference]: Without dead ends: 96 [2024-09-21 11:21:22,074 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=854, Invalid=3702, Unknown=0, NotChecked=0, Total=4556 [2024-09-21 11:21:22,074 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:21:22,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 216 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-21 11:21:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-21 11:21:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2024-09-21 11:21:22,115 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) [2024-09-21 11:21:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2024-09-21 11:21:22,116 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 44 [2024-09-21 11:21:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:21:22,116 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2024-09-21 11:21:22,116 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) [2024-09-21 11:21:22,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2024-09-21 11:21:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 11:21:22,117 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:22,117 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] [2024-09-21 11:21:22,135 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:21:22,317 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 [2024-09-21 11:21:22,318 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:22,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:22,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2139655518, now seen corresponding path program 3 times [2024-09-21 11:21:22,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:22,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335396681] [2024-09-21 11:21:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:22,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:22,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 11:21:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:22,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 11:21:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:22,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:21:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:22,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-21 11:21:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-21 11:21:22,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:22,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335396681] [2024-09-21 11:21:22,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335396681] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:21:22,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56260620] [2024-09-21 11:21:22,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:21:22,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:22,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:21:22,534 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) [2024-09-21 11:21:22,535 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:21:22,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 11:21:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:21:22,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-21 11:21:22,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:21:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-21 11:21:22,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:21:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-21 11:21:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56260620] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:21:22,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:21:22,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-21 11:21:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157068527] [2024-09-21 11:21:22,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:21:22,847 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 11:21:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:21:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 11:21:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2024-09-21 11:21:22,848 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) [2024-09-21 11:21:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:21:23,348 INFO L93 Difference]: Finished difference Result 210 states and 256 transitions. [2024-09-21 11:21:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 11:21:23,349 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 [2024-09-21 11:21:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:21:23,351 INFO L225 Difference]: With dead ends: 210 [2024-09-21 11:21:23,351 INFO L226 Difference]: Without dead ends: 145 [2024-09-21 11:21:23,352 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 [2024-09-21 11:21:23,353 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 183 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-21 11:21:23,353 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] [2024-09-21 11:21:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-21 11:21:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2024-09-21 11:21:23,384 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) [2024-09-21 11:21:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2024-09-21 11:21:23,385 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 54 [2024-09-21 11:21:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:21:23,386 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2024-09-21 11:21:23,386 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) [2024-09-21 11:21:23,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2024-09-21 11:21:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-21 11:21:23,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:23,387 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] [2024-09-21 11:21:23,400 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 11:21:23,591 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 [2024-09-21 11:21:23,592 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:23,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1861535634, now seen corresponding path program 4 times [2024-09-21 11:21:23,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:23,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028212456] [2024-09-21 11:21:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:23,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:23,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:21:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:23,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-21 11:21:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:23,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:21:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:23,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-21 11:21:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-21 11:21:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028212456] [2024-09-21 11:21:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028212456] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:21:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134586370] [2024-09-21 11:21:23,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:21:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:23,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:21:23,907 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) [2024-09-21 11:21:23,908 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:21:24,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:21:24,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:21:24,099 WARN L260 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-09-21 11:21:24,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:21:24,108 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 [2024-09-21 11:21:24,128 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 [2024-09-21 11:21:24,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,152 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 [2024-09-21 11:21:24,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,183 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 [2024-09-21 11:21:24,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,219 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 [2024-09-21 11:21:24,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,261 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 [2024-09-21 11:21:24,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,311 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 [2024-09-21 11:21:24,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,364 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 [2024-09-21 11:21:24,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,426 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 [2024-09-21 11:21:24,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,496 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 [2024-09-21 11:21:24,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,569 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 [2024-09-21 11:21:24,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:21:24,657 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 [2024-09-21 11:21:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 6 proven. 121 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 11:21:27,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:22:19,585 WARN L293 SmtUtils]: Spent 5.64s 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) [2024-09-21 11:22:40,366 WARN L293 SmtUtils]: Spent 10.41s 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) [2024-09-21 11:23:10,175 WARN L293 SmtUtils]: Spent 16.79s 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) [2024-09-21 11:23:43,755 WARN L293 SmtUtils]: Spent 16.97s 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) [2024-09-21 11:23:43,772 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 [2024-09-21 11:23:44,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 11:23:44,445 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 [2024-09-21 11:24:32,872 WARN L293 SmtUtils]: Spent 48.42s 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) [2024-09-21 11:24:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 73 proven. 60 refuted. 3 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 11:24:58,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134586370] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:24:58,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:24:58,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 38] total 77 [2024-09-21 11:24:58,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271013268] [2024-09-21 11:24:58,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:24:58,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-21 11:24:58,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:24:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-21 11:24:58,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4947, Unknown=4, NotChecked=0, Total=5852 [2024-09-21 11:24:58,669 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)