./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_4.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/array_4.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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:19:19,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:19:19,700 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:19:19,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:19:19,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:19:19,737 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:19:19,738 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:19:19,738 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:19:19,739 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:19:19,741 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:19:19,741 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:19:19,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:19:19,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:19:19,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:19:19,746 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:19:19,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:19:19,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:19:19,747 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:19:19,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:19:19,748 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:19:19,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:19:19,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:19:19,749 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:19:19,750 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:19:19,751 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:19:19,751 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:19:19,751 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:19:19,752 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:19:19,752 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:19:19,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:19:19,752 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:19:19,752 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:19:19,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:19:19,753 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:19:19,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:19:19,754 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:19:19,755 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:19:19,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:19:19,755 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:19:19,756 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:19:19,756 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:19:19,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:19:19,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:19:20,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:19:20,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:19:20,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:19:20,029 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:19:20,030 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:19:20,031 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/array_4.i [2024-09-21 11:19:21,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:19:21,509 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:19:21,510 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_4.i [2024-09-21 11:19:21,516 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9f89b8094/e5c009b45638492ba8d05c3104db9064/FLAG1ac38bd94 [2024-09-21 11:19:21,529 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9f89b8094/e5c009b45638492ba8d05c3104db9064 [2024-09-21 11:19:21,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:19:21,533 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:19:21,535 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:19:21,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:19:21,540 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:19:21,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc195a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21, skipping insertion in model container [2024-09-21 11:19:21,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:19:21,708 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-acceleration/array_4.i[848,861] [2024-09-21 11:19:21,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:19:21,727 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:19:21,738 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-acceleration/array_4.i[848,861] [2024-09-21 11:19:21,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:19:21,765 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:19:21,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21 WrapperNode [2024-09-21 11:19:21,765 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:19:21,768 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:19:21,768 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:19:21,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:19:21,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,787 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:19:21,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:19:21,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:19:21,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:19:21,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:19:21,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,797 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,806 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 2 writes are split as follows [0, 2]. [2024-09-21 11:19:21,807 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,807 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:19:21,822 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:19:21,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:19:21,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:19:21,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (1/1) ... [2024-09-21 11:19:21,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:19:21,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:19:21,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:19:21,856 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:19:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:19:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:19:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:19:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:19:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 11:19:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 11:19:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 11:19:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 11:19:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:19:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:19:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:19:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:19:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 11:19:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 11:19:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:19:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:19:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 11:19:21,971 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:19:21,972 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:19:22,078 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-21 11:19:22,079 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:19:22,104 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:19:22,104 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 11:19:22,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:22 BoogieIcfgContainer [2024-09-21 11:19:22,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:19:22,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:19:22,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:19:22,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:19:22,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:19:21" (1/3) ... [2024-09-21 11:19:22,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427ce479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:22, skipping insertion in model container [2024-09-21 11:19:22,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:21" (2/3) ... [2024-09-21 11:19:22,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427ce479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:22, skipping insertion in model container [2024-09-21 11:19:22,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:22" (3/3) ... [2024-09-21 11:19:22,113 INFO L112 eAbstractionObserver]: Analyzing ICFG array_4.i [2024-09-21 11:19:22,125 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:19:22,125 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:19:22,167 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:19:22,175 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;@4c9fb98f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:19:22,175 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:19:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 11:19:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-21 11:19:22,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:22,186 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:22,186 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:22,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1249554957, now seen corresponding path program 1 times [2024-09-21 11:19:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:22,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651226312] [2024-09-21 11:19:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:22,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:19:22,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651226312] [2024-09-21 11:19:22,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651226312] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:19:22,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:19:22,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:19:22,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808547908] [2024-09-21 11:19:22,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:19:22,380 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:19:22,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:19:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:19:22,405 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:22,442 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-09-21 11:19:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:19:22,445 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2024-09-21 11:19:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:22,454 INFO L225 Difference]: With dead ends: 34 [2024-09-21 11:19:22,454 INFO L226 Difference]: Without dead ends: 14 [2024-09-21 11:19:22,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:19:22,462 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:22,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:19:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-21 11:19:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-21 11:19:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-21 11:19:22,495 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2024-09-21 11:19:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:22,496 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-21 11:19:22,496 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-21 11:19:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 11:19:22,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:22,498 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:22,499 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:19:22,499 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:22,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash -363770631, now seen corresponding path program 1 times [2024-09-21 11:19:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:22,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775652217] [2024-09-21 11:19:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:22,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:22,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:19:22,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:22,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775652217] [2024-09-21 11:19:22,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775652217] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:19:22,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:19:22,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:19:22,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599730528] [2024-09-21 11:19:22,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:19:22,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:19:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:22,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:19:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:19:22,656 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:22,684 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-09-21 11:19:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:19:22,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-21 11:19:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:22,686 INFO L225 Difference]: With dead ends: 26 [2024-09-21 11:19:22,687 INFO L226 Difference]: Without dead ends: 18 [2024-09-21 11:19:22,688 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:19:22,690 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:22,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:19:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-21 11:19:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2024-09-21 11:19:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-09-21 11:19:22,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2024-09-21 11:19:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:22,698 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-09-21 11:19:22,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-09-21 11:19:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-21 11:19:22,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:22,701 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:22,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:19:22,702 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:22,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 326418081, now seen corresponding path program 1 times [2024-09-21 11:19:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:22,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48687750] [2024-09-21 11:19:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:22,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:22,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:19:22,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:22,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48687750] [2024-09-21 11:19:22,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48687750] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:19:22,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224399624] [2024-09-21 11:19:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:22,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:22,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:19:22,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:19:22,802 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:19:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:22,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-21 11:19:22,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:19:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:19:22,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:19:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:19:22,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224399624] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:19:22,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:19:22,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-21 11:19:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284446391] [2024-09-21 11:19:22,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:19:22,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 11:19:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 11:19:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:19:22,938 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:22,975 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-09-21 11:19:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:19:22,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 14 [2024-09-21 11:19:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:22,977 INFO L225 Difference]: With dead ends: 38 [2024-09-21 11:19:22,977 INFO L226 Difference]: Without dead ends: 30 [2024-09-21 11:19:22,978 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:19:22,978 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:22,979 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:19:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-21 11:19:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2024-09-21 11:19:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-21 11:19:22,983 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2024-09-21 11:19:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:22,984 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-21 11:19:22,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:22,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-21 11:19:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-21 11:19:22,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:22,985 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:23,002 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:19:23,189 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:23,190 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:23,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -797673735, now seen corresponding path program 2 times [2024-09-21 11:19:23,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:23,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763084519] [2024-09-21 11:19:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:23,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:23,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-21 11:19:23,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:23,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763084519] [2024-09-21 11:19:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763084519] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:19:23,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:19:23,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:19:23,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847515464] [2024-09-21 11:19:23,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:19:23,370 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:19:23,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:19:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:19:23,372 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:23,419 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-21 11:19:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:19:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 17 [2024-09-21 11:19:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:23,420 INFO L225 Difference]: With dead ends: 25 [2024-09-21 11:19:23,420 INFO L226 Difference]: Without dead ends: 20 [2024-09-21 11:19:23,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:19:23,422 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:23,422 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:19:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-21 11:19:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-09-21 11:19:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-09-21 11:19:23,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2024-09-21 11:19:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:23,427 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-09-21 11:19:23,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:23,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-09-21 11:19:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-21 11:19:23,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:23,428 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:23,428 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-21 11:19:23,429 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:23,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1935838945, now seen corresponding path program 1 times [2024-09-21 11:19:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729256981] [2024-09-21 11:19:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:23,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-21 11:19:23,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729256981] [2024-09-21 11:19:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729256981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:19:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481303052] [2024-09-21 11:19:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:23,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:23,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:19:23,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:19:23,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:19:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:23,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 11:19:23,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:19:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 11:19:23,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:19:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 11:19:23,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481303052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:19:23,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:19:23,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-09-21 11:19:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852981488] [2024-09-21 11:19:23,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:19:23,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 11:19:23,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 11:19:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-09-21 11:19:23,747 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:23,858 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-21 11:19:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 11:19:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-21 11:19:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:23,860 INFO L225 Difference]: With dead ends: 65 [2024-09-21 11:19:23,860 INFO L226 Difference]: Without dead ends: 44 [2024-09-21 11:19:23,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-09-21 11:19:23,866 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:23,866 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:19:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-21 11:19:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-21 11:19:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-09-21 11:19:23,879 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 19 [2024-09-21 11:19:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:23,880 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-09-21 11:19:23,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:23,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-09-21 11:19:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 11:19:23,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:23,884 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:23,901 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:19:24,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:24,085 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:24,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1044490229, now seen corresponding path program 2 times [2024-09-21 11:19:24,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:24,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045712390] [2024-09-21 11:19:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:24,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-09-21 11:19:24,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045712390] [2024-09-21 11:19:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045712390] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:19:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574454026] [2024-09-21 11:19:24,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:19:24,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:19:24,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:19:24,406 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:19:24,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:19:24,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:19:24,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-21 11:19:24,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:19:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-09-21 11:19:24,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:19:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-09-21 11:19:24,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574454026] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:19:24,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:19:24,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-21 11:19:24,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637551633] [2024-09-21 11:19:24,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:19:24,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 11:19:24,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 11:19:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:19:24,832 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:24,988 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2024-09-21 11:19:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-21 11:19:24,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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 43 [2024-09-21 11:19:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:24,990 INFO L225 Difference]: With dead ends: 120 [2024-09-21 11:19:24,990 INFO L226 Difference]: Without dead ends: 92 [2024-09-21 11:19:24,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:19:24,994 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:24,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 67 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:19:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-21 11:19:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2024-09-21 11:19:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-09-21 11:19:25,014 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 43 [2024-09-21 11:19:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:25,015 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-09-21 11:19:25,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:25,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-09-21 11:19:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-21 11:19:25,017 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:25,017 INFO L216 NwaCegarLoop]: trace histogram [22, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:25,034 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:19:25,218 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-21 11:19:25,218 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:25,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1085561355, now seen corresponding path program 3 times [2024-09-21 11:19:25,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:25,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259833852] [2024-09-21 11:19:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:25,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-09-21 11:19:25,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:25,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259833852] [2024-09-21 11:19:25,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259833852] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:19:25,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095826805] [2024-09-21 11:19:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:19:25,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:19:25,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:19:25,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:19:26,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-21 11:19:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:19:26,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-21 11:19:26,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:19:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-21 11:19:26,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:19:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-21 11:19:27,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095826805] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:19:27,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:19:27,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15, 15] total 39 [2024-09-21 11:19:27,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704226181] [2024-09-21 11:19:27,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:19:27,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-21 11:19:27,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:27,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-21 11:19:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2024-09-21 11:19:27,221 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:27,440 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2024-09-21 11:19:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-21 11:19:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 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 55 [2024-09-21 11:19:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:27,442 INFO L225 Difference]: With dead ends: 168 [2024-09-21 11:19:27,442 INFO L226 Difference]: Without dead ends: 114 [2024-09-21 11:19:27,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 11:19:27,444 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:27,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 77 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:19:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-21 11:19:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-09-21 11:19:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2024-09-21 11:19:27,456 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 55 [2024-09-21 11:19:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:27,456 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2024-09-21 11:19:27,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:27,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2024-09-21 11:19:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-21 11:19:27,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:27,460 INFO L216 NwaCegarLoop]: trace histogram [35, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:27,478 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 11:19:27,660 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:27,660 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:27,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash 638229637, now seen corresponding path program 4 times [2024-09-21 11:19:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:27,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053868510] [2024-09-21 11:19:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:27,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:28,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-09-21 11:19:28,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053868510] [2024-09-21 11:19:28,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053868510] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:19:28,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030317937] [2024-09-21 11:19:28,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:19:28,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:19:28,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:19:28,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:19:29,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:19:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:19:29,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-21 11:19:29,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:19:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-09-21 11:19:29,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:19:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-09-21 11:19:30,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030317937] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:19:30,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:19:30,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-21 11:19:30,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313551497] [2024-09-21 11:19:30,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:19:30,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-21 11:19:30,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:19:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-21 11:19:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-21 11:19:30,413 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:19:30,854 INFO L93 Difference]: Finished difference Result 320 states and 387 transitions. [2024-09-21 11:19:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-21 11:19:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 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 113 [2024-09-21 11:19:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:19:30,856 INFO L225 Difference]: With dead ends: 320 [2024-09-21 11:19:30,856 INFO L226 Difference]: Without dead ends: 244 [2024-09-21 11:19:30,857 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-21 11:19:30,858 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 382 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:19:30,858 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 84 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:19:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-09-21 11:19:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 148. [2024-09-21 11:19:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2024-09-21 11:19:30,874 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 113 [2024-09-21 11:19:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:19:30,874 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2024-09-21 11:19:30,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:19:30,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2024-09-21 11:19:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-09-21 11:19:30,878 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:19:30,878 INFO L216 NwaCegarLoop]: trace histogram [66, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:19:30,896 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 11:19:31,078 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-21 11:19:31,079 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:19:31,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:19:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1439981179, now seen corresponding path program 5 times [2024-09-21 11:19:31,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:19:31,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190359817] [2024-09-21 11:19:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:19:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:19:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:34,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:19:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:19:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-09-21 11:19:34,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:19:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190359817] [2024-09-21 11:19:34,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190359817] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:19:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318685531] [2024-09-21 11:19:34,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:19:34,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:19:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:19:34,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:19:34,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:21:30,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2024-09-21 11:21:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:21:30,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-21 11:21:30,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:21:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-09-21 11:21:30,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:21:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-09-21 11:21:34,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318685531] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:21:34,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:21:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 137 [2024-09-21 11:21:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849025519] [2024-09-21 11:21:34,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:21:34,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-09-21 11:21:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:21:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-09-21 11:21:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2024-09-21 11:21:34,552 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:21:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:21:37,060 INFO L93 Difference]: Finished difference Result 592 states and 761 transitions. [2024-09-21 11:21:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-09-21 11:21:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 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 147 [2024-09-21 11:21:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:21:37,064 INFO L225 Difference]: With dead ends: 592 [2024-09-21 11:21:37,064 INFO L226 Difference]: Without dead ends: 516 [2024-09-21 11:21:37,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2024-09-21 11:21:37,068 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 947 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 11:21:37,069 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 158 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 11:21:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2024-09-21 11:21:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 216. [2024-09-21 11:21:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:21:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2024-09-21 11:21:37,090 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 147 [2024-09-21 11:21:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:21:37,090 INFO L474 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2024-09-21 11:21:37,091 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:21:37,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2024-09-21 11:21:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-09-21 11:21:37,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:21:37,094 INFO L216 NwaCegarLoop]: trace histogram [134, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:21:37,134 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 11:21:37,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:37,295 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:21:37,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:21:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1120277627, now seen corresponding path program 6 times [2024-09-21 11:21:37,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:21:37,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786202130] [2024-09-21 11:21:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:21:37,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:21:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:47,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:21:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:21:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10235 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-09-21 11:21:47,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:21:47,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786202130] [2024-09-21 11:21:47,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786202130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:21:47,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101351942] [2024-09-21 11:21:47,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:21:47,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:21:47,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:21:47,149 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:21:47,150 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process