./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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:39:14,210 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:39:14,291 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:39:14,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:39:14,300 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:39:14,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:39:14,343 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:39:14,343 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:39:14,344 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:39:14,344 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:39:14,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:39:14,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:39:14,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:39:14,350 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:39:14,350 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:39:14,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:39:14,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:39:14,351 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:39:14,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:39:14,353 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:39:14,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:39:14,354 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:39:14,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:39:14,354 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:39:14,355 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:39:14,355 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:39:14,355 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:39:14,355 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:39:14,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:39:14,356 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:39:14,356 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:39:14,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:39:14,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:39:14,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:39:14,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:39:14,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:39:14,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:39:14,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:39:14,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:39:14,370 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:39:14,371 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:39:14,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:39:14,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:39:14,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:39:14,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:39:14,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:39:14,738 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:39:14,739 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:39:14,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-09-15 18:39:16,406 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:39:16,640 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:39:16,640 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-09-15 18:39:16,647 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5d69506fe/2bfbe1b9a6da441895acd81d470452f6/FLAG4a9a3722a [2024-09-15 18:39:17,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5d69506fe/2bfbe1b9a6da441895acd81d470452f6 [2024-09-15 18:39:17,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:39:17,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:39:17,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:39:17,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:39:17,015 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:39:17,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c7de97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17, skipping insertion in model container [2024-09-15 18:39:17,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,036 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:39:17,223 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] [2024-09-15 18:39:17,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:39:17,261 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:39:17,273 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] [2024-09-15 18:39:17,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:39:17,307 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:39:17,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17 WrapperNode [2024-09-15 18:39:17,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:39:17,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:39:17,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:39:17,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:39:17,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,334 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:39:17,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:39:17,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:39:17,335 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:39:17,335 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:39:17,345 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,351 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,374 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]. [2024-09-15 18:39:17,375 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,380 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,387 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:39:17,395 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:39:17,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:39:17,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:39:17,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (1/1) ... [2024-09-15 18:39:17,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:39:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:39:17,442 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) [2024-09-15 18:39:17,446 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 [2024-09-15 18:39:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:39:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:39:17,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:39:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:39:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 18:39:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 18:39:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 18:39:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 18:39:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:39:17,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:39:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:39:17,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:39:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 18:39:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 18:39:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:39:17,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:39:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 18:39:17,596 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:39:17,600 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:39:17,800 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 18:39:17,801 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:39:17,836 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:39:17,840 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 18:39:17,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:39:17 BoogieIcfgContainer [2024-09-15 18:39:17,842 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:39:17,844 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:39:17,845 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:39:17,848 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:39:17,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:39:17" (1/3) ... [2024-09-15 18:39:17,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40932320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:39:17, skipping insertion in model container [2024-09-15 18:39:17,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:39:17" (2/3) ... [2024-09-15 18:39:17,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40932320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:39:17, skipping insertion in model container [2024-09-15 18:39:17,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:39:17" (3/3) ... [2024-09-15 18:39:17,854 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2024-09-15 18:39:17,872 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:39:17,872 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:39:17,941 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:39:17,949 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;@5d026bab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:39:17,949 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:39:17,954 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) [2024-09-15 18:39:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-15 18:39:17,962 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:39:17,963 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:39:17,964 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:39:17,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1680342938, now seen corresponding path program 1 times [2024-09-15 18:39:17,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:39:17,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280961106] [2024-09-15 18:39:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:17,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:39:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:18,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:39:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:39:18,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:39:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280961106] [2024-09-15 18:39:18,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280961106] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:39:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:39:18,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:39:18,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153939776] [2024-09-15 18:39:18,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:39:18,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:39:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:39:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:39:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:39:18,378 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) [2024-09-15 18:39:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:39:18,441 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2024-09-15 18:39:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:39:18,445 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 [2024-09-15 18:39:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:39:18,454 INFO L225 Difference]: With dead ends: 48 [2024-09-15 18:39:18,455 INFO L226 Difference]: Without dead ends: 26 [2024-09-15 18:39:18,458 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 [2024-09-15 18:39:18,462 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 [2024-09-15 18:39:18,463 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] [2024-09-15 18:39:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-15 18:39:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-09-15 18:39:18,503 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) [2024-09-15 18:39:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-15 18:39:18,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2024-09-15 18:39:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:39:18,509 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-15 18:39:18,509 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) [2024-09-15 18:39:18,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-15 18:39:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:39:18,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:39:18,511 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:39:18,512 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:39:18,512 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:39:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -883064150, now seen corresponding path program 1 times [2024-09-15 18:39:18,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:39:18,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606111245] [2024-09-15 18:39:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:18,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:39:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:18,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:39:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:39:18,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:39:18,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606111245] [2024-09-15 18:39:18,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606111245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:39:18,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279241420] [2024-09-15 18:39:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:18,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:39:18,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:39:18,822 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) [2024-09-15 18:39:18,824 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:39:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:18,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:39:18,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:39:18,980 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 [2024-09-15 18:39:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:39:19,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:39:19,421 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 [2024-09-15 18:39:19,431 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 [2024-09-15 18:39:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:39:19,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279241420] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:39:19,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:39:19,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2024-09-15 18:39:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683646437] [2024-09-15 18:39:19,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:39:19,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 18:39:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:39:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 18:39:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:39:19,483 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) [2024-09-15 18:39:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:39:19,750 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-09-15 18:39:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:39:19,751 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 [2024-09-15 18:39:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:39:19,752 INFO L225 Difference]: With dead ends: 53 [2024-09-15 18:39:19,752 INFO L226 Difference]: Without dead ends: 37 [2024-09-15 18:39:19,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:39:19,757 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 [2024-09-15 18:39:19,759 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] [2024-09-15 18:39:19,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-15 18:39:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-09-15 18:39:19,778 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) [2024-09-15 18:39:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-15 18:39:19,780 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2024-09-15 18:39:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:39:19,780 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-15 18:39:19,780 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) [2024-09-15 18:39:19,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-15 18:39:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 18:39:19,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:39:19,782 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] [2024-09-15 18:39:19,802 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:39:19,986 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 [2024-09-15 18:39:19,987 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:39:19,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash 985465248, now seen corresponding path program 1 times [2024-09-15 18:39:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:39:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31829227] [2024-09-15 18:39:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:19,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:39:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:20,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:39:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:20,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:39:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:39:20,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:39:20,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31829227] [2024-09-15 18:39:20,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31829227] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:39:20,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36397128] [2024-09-15 18:39:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:39:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:39:20,180 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) [2024-09-15 18:39:20,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:39:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:20,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:39:20,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:39:20,265 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 [2024-09-15 18:39:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:39:20,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:39:20,844 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 [2024-09-15 18:39:20,849 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 [2024-09-15 18:39:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:39:20,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36397128] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:39:20,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:39:20,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2024-09-15 18:39:20,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940858052] [2024-09-15 18:39:20,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:39:20,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 18:39:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:39:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 18:39:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:39:20,927 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) [2024-09-15 18:39:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:39:21,611 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2024-09-15 18:39:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 18:39:21,612 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 [2024-09-15 18:39:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:39:21,614 INFO L225 Difference]: With dead ends: 77 [2024-09-15 18:39:21,614 INFO L226 Difference]: Without dead ends: 52 [2024-09-15 18:39:21,615 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:39:21,618 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:39:21,618 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] [2024-09-15 18:39:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-15 18:39:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-09-15 18:39:21,650 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) [2024-09-15 18:39:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-09-15 18:39:21,653 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 24 [2024-09-15 18:39:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:39:21,654 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-09-15 18:39:21,654 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) [2024-09-15 18:39:21,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-09-15 18:39:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 18:39:21,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:39:21,658 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] [2024-09-15 18:39:21,676 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 18:39:21,858 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 [2024-09-15 18:39:21,859 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:39:21,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash 494841382, now seen corresponding path program 1 times [2024-09-15 18:39:21,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:39:21,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241320674] [2024-09-15 18:39:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:39:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:22,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:39:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:22,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 18:39:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:22,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:39:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:39:22,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:39:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241320674] [2024-09-15 18:39:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241320674] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:39:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915019198] [2024-09-15 18:39:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:22,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:39:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:39:22,034 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) [2024-09-15 18:39:22,035 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:39:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:22,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-15 18:39:22,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:39:22,131 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 [2024-09-15 18:39:22,155 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 [2024-09-15 18:39:22,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:22,185 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 [2024-09-15 18:39:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:39:22,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:39:24,123 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 [2024-09-15 18:39:24,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:24,137 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 [2024-09-15 18:39:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:39:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915019198] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:39:24,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:39:24,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 18] total 33 [2024-09-15 18:39:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718984160] [2024-09-15 18:39:24,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:39:24,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 18:39:24,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:39:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 18:39:24,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:39:24,312 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) [2024-09-15 18:39:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:39:26,945 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2024-09-15 18:39:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:39:26,946 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 [2024-09-15 18:39:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:39:26,948 INFO L225 Difference]: With dead ends: 116 [2024-09-15 18:39:26,948 INFO L226 Difference]: Without dead ends: 83 [2024-09-15 18:39:26,949 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=570, Invalid=2186, Unknown=0, NotChecked=0, Total=2756 [2024-09-15 18:39:26,950 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:39:26,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 173 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:39:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-15 18:39:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2024-09-15 18:39:26,987 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) [2024-09-15 18:39:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2024-09-15 18:39:26,988 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 34 [2024-09-15 18:39:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:39:26,989 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2024-09-15 18:39:26,989 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) [2024-09-15 18:39:26,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2024-09-15 18:39:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:39:26,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:39:26,991 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] [2024-09-15 18:39:27,009 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 18:39:27,192 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 [2024-09-15 18:39:27,192 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:39:27,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1913706916, now seen corresponding path program 2 times [2024-09-15 18:39:27,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:39:27,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425315488] [2024-09-15 18:39:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:27,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:39:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:27,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:39:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:27,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 18:39:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:27,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:39:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:27,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 18:39:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:39:27,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:39:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425315488] [2024-09-15 18:39:27,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425315488] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:39:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561236755] [2024-09-15 18:39:27,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:39:27,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:39:27,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:39:27,354 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) [2024-09-15 18:39:27,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:39:27,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:39:27,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:39:27,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 18:39:27,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:39:27,437 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 [2024-09-15 18:39:27,452 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 [2024-09-15 18:39:27,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:27,483 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 [2024-09-15 18:39:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:39:28,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:39:31,309 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 [2024-09-15 18:39:31,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:31,327 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 [2024-09-15 18:39:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:39:31,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561236755] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:39:31,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:39:31,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 24] total 44 [2024-09-15 18:39:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412366880] [2024-09-15 18:39:31,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:39:31,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:39:31,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:39:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:39:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:39:31,628 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) [2024-09-15 18:39:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:39:45,985 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2024-09-15 18:39:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-15 18:39:45,986 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 [2024-09-15 18:39:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:39:45,987 INFO L225 Difference]: With dead ends: 154 [2024-09-15 18:39:45,987 INFO L226 Difference]: Without dead ends: 96 [2024-09-15 18:39:45,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=854, Invalid=3702, Unknown=0, NotChecked=0, Total=4556 [2024-09-15 18:39:45,991 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:39:45,993 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 216 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 18:39:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-15 18:39:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2024-09-15 18:39:46,031 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) [2024-09-15 18:39:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2024-09-15 18:39:46,032 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 44 [2024-09-15 18:39:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:39:46,033 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2024-09-15 18:39:46,033 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) [2024-09-15 18:39:46,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2024-09-15 18:39:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:39:46,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:39:46,035 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] [2024-09-15 18:39:46,049 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:39:46,239 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 [2024-09-15 18:39:46,239 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:39:46,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2139655518, now seen corresponding path program 3 times [2024-09-15 18:39:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:39:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221809779] [2024-09-15 18:39:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:39:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:46,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:39:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:46,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 18:39:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:46,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:39:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:46,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:39:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:46,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 18:39:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 18:39:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:39:46,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221809779] [2024-09-15 18:39:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221809779] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:39:46,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878207642] [2024-09-15 18:39:46,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:39:46,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:39:46,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:39:46,477 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) [2024-09-15 18:39:46,488 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:39:46,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:39:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:39:46,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 18:39:46,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:39:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 18:39:46,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:39:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 18:39:46,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878207642] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:39:46,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:39:46,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-15 18:39:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006297341] [2024-09-15 18:39:46,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:39:46,890 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 18:39:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:39:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 18:39:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:39:46,891 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) [2024-09-15 18:39:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:39:47,408 INFO L93 Difference]: Finished difference Result 210 states and 256 transitions. [2024-09-15 18:39:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:39:47,409 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 [2024-09-15 18:39:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:39:47,412 INFO L225 Difference]: With dead ends: 210 [2024-09-15 18:39:47,415 INFO L226 Difference]: Without dead ends: 145 [2024-09-15 18:39:47,415 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 [2024-09-15 18:39:47,416 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 [2024-09-15 18:39:47,416 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] [2024-09-15 18:39:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-15 18:39:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2024-09-15 18:39:47,468 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) [2024-09-15 18:39:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2024-09-15 18:39:47,472 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 54 [2024-09-15 18:39:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:39:47,473 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2024-09-15 18:39:47,473 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) [2024-09-15 18:39:47,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2024-09-15 18:39:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 18:39:47,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:39:47,475 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] [2024-09-15 18:39:47,496 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:39:47,679 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 [2024-09-15 18:39:47,680 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:39:47,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:39:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1861535634, now seen corresponding path program 4 times [2024-09-15 18:39:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:39:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538333994] [2024-09-15 18:39:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:39:47,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:39:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:48,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:39:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:48,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:39:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:48,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:39:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:48,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 18:39:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:48,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 18:39:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:39:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 18:39:48,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:39:48,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538333994] [2024-09-15 18:39:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538333994] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:39:48,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323369572] [2024-09-15 18:39:48,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:39:48,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:39:48,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:39:48,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:39:48,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:39:48,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:39:48,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:39:48,376 WARN L260 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-09-15 18:39:48,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:39:48,392 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 [2024-09-15 18:39:48,422 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 [2024-09-15 18:39:48,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,457 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 [2024-09-15 18:39:48,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,510 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 [2024-09-15 18:39:48,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,563 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 [2024-09-15 18:39:48,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,625 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 [2024-09-15 18:39:48,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,698 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 [2024-09-15 18:39:48,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,769 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 [2024-09-15 18:39:48,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,847 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 [2024-09-15 18:39:48,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:48,931 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 [2024-09-15 18:39:49,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:49,022 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 [2024-09-15 18:39:49,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:39:49,115 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 [2024-09-15 18:39:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 6 proven. 121 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:39:51,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:40:56,168 WARN L293 SmtUtils]: Spent 8.46s 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) [2024-09-15 18:41:16,432 WARN L293 SmtUtils]: Spent 8.82s 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) [2024-09-15 18:41:42,870 WARN L293 SmtUtils]: Spent 13.40s 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) [2024-09-15 18:42:17,323 WARN L293 SmtUtils]: Spent 16.47s 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) [2024-09-15 18:42:17,346 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 [2024-09-15 18:42:18,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:42:18,174 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 [2024-09-15 18:43:04,409 WARN L293 SmtUtils]: Spent 46.22s 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) [2024-09-15 18:43:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 73 proven. 60 refuted. 3 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:43:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323369572] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:30,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:30,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 38] total 77 [2024-09-15 18:43:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649195670] [2024-09-15 18:43:30,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:30,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-15 18:43:30,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-15 18:43:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4947, Unknown=4, NotChecked=0, Total=5852 [2024-09-15 18:43:30,547 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)