./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/mcmillan2006.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 ca4ee3dd 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-lit/mcmillan2006.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 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be --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-ca4ee3d-m [2024-09-20 18:47:43,020 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:47:43,069 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:47:43,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:47:43,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:47:43,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:47:43,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:47:43,099 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:47:43,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:47:43,102 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:47:43,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:47:43,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:47:43,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:47:43,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:47:43,103 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:47:43,104 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:47:43,104 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:47:43,104 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:47:43,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:47:43,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:47:43,105 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:47:43,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:47:43,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:47:43,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:47:43,109 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:47:43,109 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:47:43,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:47:43,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:47:43,110 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:47:43,110 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:47:43,110 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:47:43,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:47:43,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:47:43,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:47:43,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:47:43,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:47:43,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:47:43,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:47:43,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:47:43,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:47:43,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:47:43,114 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:47:43,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:47:43,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:47:43,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:47:43,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:47:43,360 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:47:43,360 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:47:43,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-lit/mcmillan2006.i [2024-09-20 18:47:44,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:47:44,827 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:47:44,828 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/mcmillan2006.i [2024-09-20 18:47:44,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/60bf6a2af/131f6d56c74244d3ae08f2af67484ce4/FLAG6b8126af8 [2024-09-20 18:47:45,233 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/60bf6a2af/131f6d56c74244d3ae08f2af67484ce4 [2024-09-20 18:47:45,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:47:45,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:47:45,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:47:45,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:47:45,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:47:45,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1d897e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45, skipping insertion in model container [2024-09-20 18:47:45,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,259 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:47:45,383 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-lit/mcmillan2006.i[1009,1022] [2024-09-20 18:47:45,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:47:45,401 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:47:45,412 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-lit/mcmillan2006.i[1009,1022] [2024-09-20 18:47:45,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:47:45,425 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:47:45,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45 WrapperNode [2024-09-20 18:47:45,425 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:47:45,426 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:47:45,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:47:45,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:47:45,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,440 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:47:45,441 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:47:45,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:47:45,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:47:45,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:47:45,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,449 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,457 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-20 18:47:45,458 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,458 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:47:45,465 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:47:45,465 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:47:45,465 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:47:45,466 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (1/1) ... [2024-09-20 18:47:45,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:47:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:45,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:47:45,499 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:47:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:47:45,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:47:45,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-20 18:47:45,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:47:45,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:47:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 18:47:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 18:47:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:47:45,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:47:45,591 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:47:45,593 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:47:45,751 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-20 18:47:45,751 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:47:45,778 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:47:45,779 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 18:47:45,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:47:45 BoogieIcfgContainer [2024-09-20 18:47:45,780 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:47:45,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:47:45,782 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:47:45,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:47:45,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:47:45" (1/3) ... [2024-09-20 18:47:45,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46982d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:47:45, skipping insertion in model container [2024-09-20 18:47:45,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:47:45" (2/3) ... [2024-09-20 18:47:45,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46982d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:47:45, skipping insertion in model container [2024-09-20 18:47:45,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:47:45" (3/3) ... [2024-09-20 18:47:45,788 INFO L112 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2024-09-20 18:47:45,800 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:47:45,801 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:47:45,844 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:47:45,849 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;@327cc29d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:47:45,849 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:47:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:47:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 18:47:45,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:45,858 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:45,858 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:45,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:45,863 INFO L85 PathProgramCache]: Analyzing trace with hash -94361564, now seen corresponding path program 1 times [2024-09-20 18:47:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:45,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659517006] [2024-09-20 18:47:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:45,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:45,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:45,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659517006] [2024-09-20 18:47:45,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659517006] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:47:45,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:47:45,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 18:47:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074446863] [2024-09-20 18:47:45,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:47:46,001 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 18:47:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 18:47:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:47:46,021 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:47:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:46,038 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-09-20 18:47:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 18:47:46,040 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 18:47:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:46,045 INFO L225 Difference]: With dead ends: 37 [2024-09-20 18:47:46,045 INFO L226 Difference]: Without dead ends: 17 [2024-09-20 18:47:46,047 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 [2024-09-20 18:47:46,049 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:46,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:47:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-20 18:47:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-20 18:47:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:47:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-09-20 18:47:46,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2024-09-20 18:47:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:46,074 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-09-20 18:47:46,074 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:47:46,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:46,075 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-09-20 18:47:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 18:47:46,075 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:46,075 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:46,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:47:46,076 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:46,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1124416354, now seen corresponding path program 1 times [2024-09-20 18:47:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:46,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130380179] [2024-09-20 18:47:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:46,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:46,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130380179] [2024-09-20 18:47:46,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130380179] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:47:46,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:47:46,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 18:47:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258188989] [2024-09-20 18:47:46,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:47:46,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:47:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:47:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:47:46,209 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:47:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:46,234 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-09-20 18:47:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:47:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 18:47:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:46,236 INFO L225 Difference]: With dead ends: 29 [2024-09-20 18:47:46,236 INFO L226 Difference]: Without dead ends: 18 [2024-09-20 18:47:46,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:47:46,238 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:46,239 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:47:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-20 18:47:46,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-20 18:47:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:47:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-20 18:47:46,244 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-20 18:47:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:46,244 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-20 18:47:46,244 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:47:46,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-20 18:47:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:47:46,245 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:46,245 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:46,246 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:47:46,246 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:46,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1626584132, now seen corresponding path program 1 times [2024-09-20 18:47:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274564182] [2024-09-20 18:47:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:46,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:46,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274564182] [2024-09-20 18:47:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274564182] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184095049] [2024-09-20 18:47:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:46,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:46,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:47:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:46,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 18:47:46,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:46,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:47:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:46,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:47:46,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-09-20 18:47:46,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-09-20 18:47:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:46,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184095049] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:47:46,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:47:46,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-09-20 18:47:46,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546661829] [2024-09-20 18:47:46,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:47:46,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:47:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:47:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:47:46,768 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 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) [2024-09-20 18:47:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:46,870 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-20 18:47:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:47:46,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 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 14 [2024-09-20 18:47:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:46,871 INFO L225 Difference]: With dead ends: 28 [2024-09-20 18:47:46,872 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 18:47:46,873 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:47:46,875 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:46,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 76 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:47:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 18:47:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-09-20 18:47:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:47:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 18:47:46,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2024-09-20 18:47:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:46,884 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 18:47:46,884 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 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) [2024-09-20 18:47:46,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 18:47:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:47:46,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:46,886 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:46,901 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:47:47,090 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 [2024-09-20 18:47:47,091 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:47,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1746762740, now seen corresponding path program 1 times [2024-09-20 18:47:47,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:47,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941618489] [2024-09-20 18:47:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:47,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:47,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:47,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:47:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:47,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:47,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941618489] [2024-09-20 18:47:47,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941618489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:47,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365951268] [2024-09-20 18:47:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:47,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:47,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:47,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:47,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:47:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:47,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 18:47:47,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:47,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:47:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:47,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365951268] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:47:47,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:47:47,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-09-20 18:47:47,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191360359] [2024-09-20 18:47:47,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:47:47,378 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 18:47:47,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:47,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 18:47:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:47:47,379 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:47:47,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:47,430 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-09-20 18:47:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:47:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-09-20 18:47:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:47,432 INFO L225 Difference]: With dead ends: 39 [2024-09-20 18:47:47,432 INFO L226 Difference]: Without dead ends: 25 [2024-09-20 18:47:47,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:47:47,433 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:47,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:47:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-20 18:47:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-20 18:47:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:47:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-09-20 18:47:47,447 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2024-09-20 18:47:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:47,448 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-09-20 18:47:47,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:47:47,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-09-20 18:47:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 18:47:47,448 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:47,449 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:47,465 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:47:47,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:47,650 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:47,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1333923114, now seen corresponding path program 2 times [2024-09-20 18:47:47,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:47,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062399440] [2024-09-20 18:47:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:47,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:47,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:47,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:47:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:47,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:47,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062399440] [2024-09-20 18:47:47,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062399440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:47,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437632217] [2024-09-20 18:47:47,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:47:47,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:47,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:47,904 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:47:47,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:47:47,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:47:47,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 18:47:47,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:47,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:47:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:48,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:47:48,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:47:48,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:47:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437632217] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:47:48,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:47:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2024-09-20 18:47:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778634524] [2024-09-20 18:47:48,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:47:48,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 18:47:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 18:47:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:47:48,184 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:47:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:48,307 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-20 18:47:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 18:47:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-09-20 18:47:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:48,308 INFO L225 Difference]: With dead ends: 36 [2024-09-20 18:47:48,308 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 18:47:48,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:47:48,309 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:48,309 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:47:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 18:47:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-20 18:47:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:47:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-09-20 18:47:48,322 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2024-09-20 18:47:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:48,322 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-09-20 18:47:48,322 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:47:48,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-09-20 18:47:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:47:48,323 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:48,323 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:48,345 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 18:47:48,523 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:48,524 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:48,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash -815600930, now seen corresponding path program 3 times [2024-09-20 18:47:48,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:48,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735396747] [2024-09-20 18:47:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:48,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:48,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:48,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:47:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:48,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:47:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:47:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735396747] [2024-09-20 18:47:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735396747] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679505109] [2024-09-20 18:47:48,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:47:48,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:48,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:48,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:48,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:47:48,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:47:48,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:47:48,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:47:48,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:47:48,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:47:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:47:48,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679505109] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:47:48,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:47:48,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-09-20 18:47:48,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573995572] [2024-09-20 18:47:48,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:47:48,848 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 18:47:48,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 18:47:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-20 18:47:48,849 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 18:47:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:48,888 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-09-20 18:47:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:47:48,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-09-20 18:47:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:48,889 INFO L225 Difference]: With dead ends: 50 [2024-09-20 18:47:48,890 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 18:47:48,890 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-20 18:47:48,890 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:48,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:47:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 18:47:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 18:47:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:47:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-20 18:47:48,897 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2024-09-20 18:47:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:48,897 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-20 18:47:48,897 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 18:47:48,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-20 18:47:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 18:47:48,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:48,898 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:48,926 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 18:47:49,099 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:49,099 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:49,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2003727868, now seen corresponding path program 4 times [2024-09-20 18:47:49,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:49,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137816501] [2024-09-20 18:47:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:49,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:49,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:49,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 18:47:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:49,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 18:47:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:47:49,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:49,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137816501] [2024-09-20 18:47:49,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137816501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:49,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764006359] [2024-09-20 18:47:49,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:47:49,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:49,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:49,379 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:47:49,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:47:49,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:47:49,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:47:49,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:49,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 18:47:50,040 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-20 18:47:50,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-20 18:47:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:47:50,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:47:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764006359] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:50,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:47:50,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2024-09-20 18:47:50,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253480900] [2024-09-20 18:47:50,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:47:50,174 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:47:50,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:47:50,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-09-20 18:47:50,175 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:47:54,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:47:58,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:47:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:58,721 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2024-09-20 18:47:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:47:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 30 [2024-09-20 18:47:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:58,722 INFO L225 Difference]: With dead ends: 64 [2024-09-20 18:47:58,722 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 18:47:58,723 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:47:58,723 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:58,723 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 143 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 255 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-09-20 18:47:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 18:47:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-09-20 18:47:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:47:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-20 18:47:58,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2024-09-20 18:47:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:58,730 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-20 18:47:58,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:47:58,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-20 18:47:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:47:58,731 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:58,731 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:58,743 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 18:47:58,931 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:47:58,932 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:58,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash -868360470, now seen corresponding path program 5 times [2024-09-20 18:47:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:58,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88024152] [2024-09-20 18:47:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:58,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:59,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:59,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 18:47:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:59,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:47:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:59,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 18:47:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:47:59,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:59,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88024152] [2024-09-20 18:47:59,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88024152] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927624622] [2024-09-20 18:47:59,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:47:59,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:59,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:59,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:59,169 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:47:59,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-20 18:47:59,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:47:59,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 18:47:59,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:59,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:47:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:47:59,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:47:59,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:47:59,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:47:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:47:59,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927624622] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:47:59,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:47:59,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 27 [2024-09-20 18:47:59,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768605757] [2024-09-20 18:47:59,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:47:59,791 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 18:47:59,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:59,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 18:47:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2024-09-20 18:47:59,792 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 18:48:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:00,030 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-20 18:48:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 18:48:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 38 [2024-09-20 18:48:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:00,031 INFO L225 Difference]: With dead ends: 52 [2024-09-20 18:48:00,031 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 18:48:00,032 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2024-09-20 18:48:00,032 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:00,032 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 216 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:48:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 18:48:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-09-20 18:48:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 18:48:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-20 18:48:00,039 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 38 [2024-09-20 18:48:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:00,039 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-20 18:48:00,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 18:48:00,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-20 18:48:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 18:48:00,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:00,041 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:00,052 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 18:48:00,244 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:00,244 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:00,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1489740062, now seen corresponding path program 6 times [2024-09-20 18:48:00,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:00,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822330001] [2024-09-20 18:48:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:00,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:00,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:00,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-20 18:48:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:00,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:48:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:00,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 18:48:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:00,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 18:48:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:48:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822330001] [2024-09-20 18:48:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822330001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689667102] [2024-09-20 18:48:00,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:48:00,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:00,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:00,375 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:48:00,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 18:48:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:00,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:48:00,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:48:00,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:48:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689667102] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:48:00,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:48:00,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-09-20 18:48:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459396734] [2024-09-20 18:48:00,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:00,596 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 18:48:00,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 18:48:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:48:00,597 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 18:48:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:00,653 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-09-20 18:48:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:48:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2024-09-20 18:48:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:00,654 INFO L225 Difference]: With dead ends: 72 [2024-09-20 18:48:00,654 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 18:48:00,655 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:48:00,655 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:00,655 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:48:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 18:48:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 18:48:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 18:48:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-09-20 18:48:00,662 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2024-09-20 18:48:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:00,662 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-09-20 18:48:00,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 18:48:00,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-09-20 18:48:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 18:48:00,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:00,663 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:00,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 18:48:00,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:00,864 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:00,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash 977875004, now seen corresponding path program 7 times [2024-09-20 18:48:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:00,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926693363] [2024-09-20 18:48:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:01,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:01,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 18:48:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:01,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:48:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:01,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:48:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:01,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 18:48:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:48:01,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926693363] [2024-09-20 18:48:01,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926693363] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083787529] [2024-09-20 18:48:01,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:48:01,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:01,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:01,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:01,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:48:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:01,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 18:48:01,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:01,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:48:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:48:01,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:01,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:48:01,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:48:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:48:01,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083787529] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:48:01,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:48:01,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 31 [2024-09-20 18:48:01,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696033404] [2024-09-20 18:48:01,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:01,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 18:48:01,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 18:48:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2024-09-20 18:48:01,777 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 18:48:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:02,119 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-09-20 18:48:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:48:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 46 [2024-09-20 18:48:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:02,121 INFO L225 Difference]: With dead ends: 60 [2024-09-20 18:48:02,121 INFO L226 Difference]: Without dead ends: 58 [2024-09-20 18:48:02,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:48:02,122 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:02,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 254 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:48:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-20 18:48:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-09-20 18:48:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:48:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-09-20 18:48:02,130 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 46 [2024-09-20 18:48:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:02,130 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-09-20 18:48:02,130 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 18:48:02,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-09-20 18:48:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 18:48:02,131 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:02,131 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:02,144 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 18:48:02,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:02,336 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:02,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1649176692, now seen corresponding path program 8 times [2024-09-20 18:48:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767049360] [2024-09-20 18:48:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:02,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:02,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 18:48:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:02,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:48:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:02,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:48:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:02,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 18:48:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:02,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:48:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:48:02,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:02,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767049360] [2024-09-20 18:48:02,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767049360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:02,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472218590] [2024-09-20 18:48:02,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:48:02,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:02,557 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:02,558 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 18:48:02,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:48:02,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:02,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 18:48:02,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:48:02,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:48:02,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472218590] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:48:02,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:48:02,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-09-20 18:48:02,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981307392] [2024-09-20 18:48:02,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:02,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:48:02,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:48:02,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:48:02,881 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 18:48:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:02,964 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2024-09-20 18:48:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 18:48:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2024-09-20 18:48:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:02,966 INFO L225 Difference]: With dead ends: 83 [2024-09-20 18:48:02,966 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 18:48:02,966 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:48:02,967 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:02,967 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:48:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 18:48:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 18:48:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:48:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-20 18:48:02,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2024-09-20 18:48:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:02,975 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-20 18:48:02,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 18:48:02,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-20 18:48:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 18:48:02,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:02,976 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:02,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 18:48:03,176 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 18:48:03,177 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:03,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1278681258, now seen corresponding path program 9 times [2024-09-20 18:48:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:03,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271985267] [2024-09-20 18:48:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:03,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:03,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:48:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:03,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:48:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:03,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 18:48:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:03,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 18:48:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:03,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 18:48:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:48:03,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:03,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271985267] [2024-09-20 18:48:03,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271985267] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:03,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239013772] [2024-09-20 18:48:03,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:48:03,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:03,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:03,557 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 18:48:03,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 18:48:03,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:03,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 18:48:03,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:03,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 18:48:04,551 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-20 18:48:04,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-20 18:48:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:48:04,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239013772] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:04,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:48:04,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2024-09-20 18:48:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293172342] [2024-09-20 18:48:04,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:04,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 18:48:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 18:48:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 18:48:04,715 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 18:48:09,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:13,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:17,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:21,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:21,643 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2024-09-20 18:48:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 18:48:21,644 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 54 [2024-09-20 18:48:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:21,645 INFO L225 Difference]: With dead ends: 105 [2024-09-20 18:48:21,645 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 18:48:21,646 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=361, Invalid=3299, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 18:48:21,646 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:21,646 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 273 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 753 Invalid, 4 Unknown, 0 Unchecked, 16.4s Time] [2024-09-20 18:48:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 18:48:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-20 18:48:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 18:48:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-09-20 18:48:21,656 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 54 [2024-09-20 18:48:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:21,656 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-09-20 18:48:21,656 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 18:48:21,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-09-20 18:48:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 18:48:21,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:21,657 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:21,669 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 18:48:21,861 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 18:48:21,862 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:21,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1382054524, now seen corresponding path program 10 times [2024-09-20 18:48:21,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:21,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55583181] [2024-09-20 18:48:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:21,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 18:48:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:48:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 18:48:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:48:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 18:48:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 18:48:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 18:48:22,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55583181] [2024-09-20 18:48:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55583181] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446064594] [2024-09-20 18:48:22,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:48:22,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:22,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:22,216 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 18:48:22,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:48:22,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:22,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:48:22,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:22,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 18:48:23,483 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-20 18:48:23,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-20 18:48:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 51 proven. 46 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 18:48:23,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446064594] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:23,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:48:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2024-09-20 18:48:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642202354] [2024-09-20 18:48:23,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:23,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 18:48:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 18:48:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:48:23,662 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 18:48:25,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:29,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:33,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:37,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:38,910 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2024-09-20 18:48:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 18:48:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 62 [2024-09-20 18:48:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:38,911 INFO L225 Difference]: With dead ends: 112 [2024-09-20 18:48:38,911 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 18:48:38,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=4132, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 18:48:38,919 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 28 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:38,919 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 233 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 869 Invalid, 3 Unknown, 0 Unchecked, 14.7s Time] [2024-09-20 18:48:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 18:48:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-09-20 18:48:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 18:48:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-09-20 18:48:38,939 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 62 [2024-09-20 18:48:38,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:38,939 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-09-20 18:48:38,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 18:48:38,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:38,940 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-09-20 18:48:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 18:48:38,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:38,941 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:38,957 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 18:48:39,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:39,142 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:39,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:39,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1876307350, now seen corresponding path program 11 times [2024-09-20 18:48:39,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:39,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395866698] [2024-09-20 18:48:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:39,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:48:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:48:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 18:48:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 18:48:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 18:48:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 18:48:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:48:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 18:48:39,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395866698] [2024-09-20 18:48:39,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395866698] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788876825] [2024-09-20 18:48:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:48:39,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:39,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:39,525 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 18:48:39,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 18:48:39,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:39,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 18:48:39,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:39,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:48:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 18:48:40,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:40,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:48:40,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:48:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 18:48:40,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788876825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:48:40,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:48:40,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 43 [2024-09-20 18:48:40,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182654271] [2024-09-20 18:48:40,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:40,738 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-20 18:48:40,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:40,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-20 18:48:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 18:48:40,740 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 18:48:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:41,242 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2024-09-20 18:48:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 18:48:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 70 [2024-09-20 18:48:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:41,244 INFO L225 Difference]: With dead ends: 84 [2024-09-20 18:48:41,244 INFO L226 Difference]: Without dead ends: 82 [2024-09-20 18:48:41,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=2004, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 18:48:41,245 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:41,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 441 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:48:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-20 18:48:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-09-20 18:48:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 18:48:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-09-20 18:48:41,257 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 70 [2024-09-20 18:48:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:41,279 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-09-20 18:48:41,279 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 18:48:41,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-09-20 18:48:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 18:48:41,280 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:41,280 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:41,293 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 18:48:41,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 18:48:41,481 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:41,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 346996126, now seen corresponding path program 12 times [2024-09-20 18:48:41,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:41,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341524547] [2024-09-20 18:48:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:41,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:48:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:48:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 18:48:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 18:48:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 18:48:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 18:48:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:48:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-20 18:48:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:48:41,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:41,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341524547] [2024-09-20 18:48:41,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341524547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:41,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232557896] [2024-09-20 18:48:41,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:48:41,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:41,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:41,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:41,739 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 18:48:41,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-20 18:48:41,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:41,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:48:41,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:48:42,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:48:42,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232557896] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:48:42,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:48:42,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-09-20 18:48:42,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832304636] [2024-09-20 18:48:42,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:42,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 18:48:42,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:42,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 18:48:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2024-09-20 18:48:42,292 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 18:48:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:42,405 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2024-09-20 18:48:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 18:48:42,408 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 77 [2024-09-20 18:48:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:42,409 INFO L225 Difference]: With dead ends: 116 [2024-09-20 18:48:42,410 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 18:48:42,412 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2024-09-20 18:48:42,412 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:42,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:48:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 18:48:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-20 18:48:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 18:48:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-09-20 18:48:42,430 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2024-09-20 18:48:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:42,430 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-09-20 18:48:42,430 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 18:48:42,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-09-20 18:48:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-20 18:48:42,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:42,431 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:42,447 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 18:48:42,635 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 18:48:42,636 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:42,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash 58217660, now seen corresponding path program 13 times [2024-09-20 18:48:42,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:42,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882863240] [2024-09-20 18:48:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:42,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:48:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:48:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:48:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 18:48:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 18:48:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 18:48:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 18:48:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 18:48:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:48:43,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:43,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882863240] [2024-09-20 18:48:43,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882863240] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:43,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233162586] [2024-09-20 18:48:43,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:48:43,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:43,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:43,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:43,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 18:48:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:43,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 18:48:43,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:43,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:48:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:48:44,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:44,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:48:44,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:48:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:48:44,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233162586] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:48:44,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:48:44,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 47 [2024-09-20 18:48:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661848092] [2024-09-20 18:48:44,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:44,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 18:48:44,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:44,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 18:48:44,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2019, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 18:48:44,553 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 18:48:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:45,154 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2024-09-20 18:48:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 18:48:45,154 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 78 [2024-09-20 18:48:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:45,155 INFO L225 Difference]: With dead ends: 92 [2024-09-20 18:48:45,155 INFO L226 Difference]: Without dead ends: 90 [2024-09-20 18:48:45,156 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 18:48:45,156 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:45,157 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 463 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:48:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-20 18:48:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-09-20 18:48:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 18:48:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-09-20 18:48:45,170 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 78 [2024-09-20 18:48:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:45,171 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-09-20 18:48:45,171 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 18:48:45,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-09-20 18:48:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 18:48:45,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:45,172 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:45,192 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 18:48:45,391 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 18:48:45,391 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:45,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1937089780, now seen corresponding path program 14 times [2024-09-20 18:48:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:45,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772550262] [2024-09-20 18:48:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:48:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:48:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:48:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 18:48:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 18:48:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 18:48:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 18:48:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 18:48:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 18:48:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 18:48:45,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:45,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772550262] [2024-09-20 18:48:45,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772550262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:45,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865820823] [2024-09-20 18:48:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:48:45,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:45,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:45,649 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:45,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 18:48:45,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:48:45,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:45,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 18:48:45,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 18:48:45,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 18:48:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865820823] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:48:46,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:48:46,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-09-20 18:48:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273931386] [2024-09-20 18:48:46,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:46,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 18:48:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 18:48:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:48:46,116 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-20 18:48:46,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:46,230 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2024-09-20 18:48:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:48:46,231 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 85 [2024-09-20 18:48:46,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:46,232 INFO L225 Difference]: With dead ends: 127 [2024-09-20 18:48:46,232 INFO L226 Difference]: Without dead ends: 89 [2024-09-20 18:48:46,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 160 SyntacticMatches, 19 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:48:46,232 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:46,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:48:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-20 18:48:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-09-20 18:48:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 18:48:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2024-09-20 18:48:46,262 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2024-09-20 18:48:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:46,262 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2024-09-20 18:48:46,262 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-20 18:48:46,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2024-09-20 18:48:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 18:48:46,263 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:48:46,263 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:48:46,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 18:48:46,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 18:48:46,464 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:48:46,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1607595050, now seen corresponding path program 15 times [2024-09-20 18:48:46,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:48:46,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747594482] [2024-09-20 18:48:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:48:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:48:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:48:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 18:48:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 18:48:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 18:48:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 18:48:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 18:48:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 18:48:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 18:48:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 18:48:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 18:48:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:48:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 18:48:46,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:48:46,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747594482] [2024-09-20 18:48:46,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747594482] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:46,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656439383] [2024-09-20 18:48:46,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:48:46,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:46,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:48:46,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:48:46,931 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 18:48:47,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 18:48:47,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:48:47,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 18:48:47,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:48:47,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 18:48:49,165 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-20 18:48:49,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-20 18:48:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 117 proven. 82 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-20 18:48:49,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:48:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656439383] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:48:49,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:48:49,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 51 [2024-09-20 18:48:49,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980537268] [2024-09-20 18:48:49,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:48:49,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 18:48:49,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:48:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 18:48:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 18:48:49,387 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 18:48:54,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:48:58,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:02,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:06,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:10,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:14,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:18,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:22,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:49:23,435 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2024-09-20 18:49:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 18:49:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 86 [2024-09-20 18:49:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:49:23,437 INFO L225 Difference]: With dead ends: 165 [2024-09-20 18:49:23,437 INFO L226 Difference]: Without dead ends: 99 [2024-09-20 18:49:23,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 69 SyntacticMatches, 19 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=643, Invalid=7189, Unknown=0, NotChecked=0, Total=7832 [2024-09-20 18:49:23,439 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 26 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:49:23,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 396 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1626 Invalid, 8 Unknown, 0 Unchecked, 33.0s Time] [2024-09-20 18:49:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-20 18:49:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-20 18:49:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 18:49:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2024-09-20 18:49:23,457 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2024-09-20 18:49:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:49:23,457 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2024-09-20 18:49:23,457 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 18:49:23,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:49:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2024-09-20 18:49:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-20 18:49:23,458 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:49:23,458 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:49:23,471 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-20 18:49:23,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:49:23,659 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:49:23,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:49:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1437286660, now seen corresponding path program 16 times [2024-09-20 18:49:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:49:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008775996] [2024-09-20 18:49:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:49:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:49:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:49:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:49:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 18:49:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 18:49:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 18:49:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 18:49:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 18:49:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 18:49:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 18:49:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 18:49:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-20 18:49:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:49:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 18:49:24,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:49:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008775996] [2024-09-20 18:49:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008775996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:49:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111977317] [2024-09-20 18:49:24,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:49:24,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:49:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:49:24,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:49:24,231 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 18:49:24,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:49:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:49:24,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 18:49:24,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:49:24,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 18:49:27,110 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-20 18:49:27,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-20 18:49:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 145 proven. 96 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 18:49:27,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:49:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111977317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:49:27,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:49:27,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2024-09-20 18:49:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898467059] [2024-09-20 18:49:27,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:49:27,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-20 18:49:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:49:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-20 18:49:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2862, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 18:49:27,325 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 18:49:31,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:36,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:40,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:44,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:48,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:52,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:49:56,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:00,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:05,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:05,556 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2024-09-20 18:50:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-20 18:50:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 94 [2024-09-20 18:50:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:05,558 INFO L225 Difference]: With dead ends: 180 [2024-09-20 18:50:05,558 INFO L226 Difference]: Without dead ends: 107 [2024-09-20 18:50:05,559 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 75 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=726, Invalid=8394, Unknown=0, NotChecked=0, Total=9120 [2024-09-20 18:50:05,560 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 22 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:05,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 557 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2196 Invalid, 9 Unknown, 0 Unchecked, 37.1s Time] [2024-09-20 18:50:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-20 18:50:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-20 18:50:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 18:50:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2024-09-20 18:50:05,582 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2024-09-20 18:50:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:05,582 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2024-09-20 18:50:05,582 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 18:50:05,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2024-09-20 18:50:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-20 18:50:05,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:05,584 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:05,601 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 18:50:05,784 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:05,785 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:05,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1240172010, now seen corresponding path program 17 times [2024-09-20 18:50:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849735897] [2024-09-20 18:50:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:05,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:50:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:50:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 18:50:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:50:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 18:50:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 18:50:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:50:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:50:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 18:50:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 18:50:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-20 18:50:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 18:50:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849735897] [2024-09-20 18:50:06,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849735897] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409593484] [2024-09-20 18:50:06,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:50:06,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:06,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:06,398 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 18:50:06,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 18:50:06,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:06,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 18:50:06,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:06,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:50:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 18:50:08,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:08,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:50:08,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:50:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 18:50:08,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409593484] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:08,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:08,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 30] total 59 [2024-09-20 18:50:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009083499] [2024-09-20 18:50:08,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:08,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-20 18:50:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-20 18:50:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3240, Unknown=0, NotChecked=0, Total=3422 [2024-09-20 18:50:08,551 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 18:50:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:09,518 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2024-09-20 18:50:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 18:50:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 102 [2024-09-20 18:50:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:09,519 INFO L225 Difference]: With dead ends: 116 [2024-09-20 18:50:09,519 INFO L226 Difference]: Without dead ends: 114 [2024-09-20 18:50:09,520 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 178 SyntacticMatches, 23 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=210, Invalid=3696, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 18:50:09,520 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:09,521 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 695 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2513 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:50:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-20 18:50:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-09-20 18:50:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 18:50:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-09-20 18:50:09,543 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 102 [2024-09-20 18:50:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:09,543 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-09-20 18:50:09,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 18:50:09,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-09-20 18:50:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 18:50:09,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:09,544 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:09,559 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 18:50:09,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:09,748 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:09,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1925454366, now seen corresponding path program 18 times [2024-09-20 18:50:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:09,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515639128] [2024-09-20 18:50:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:50:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:50:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 18:50:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:50:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 18:50:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 18:50:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:50:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:50:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 18:50:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 18:50:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-20 18:50:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 18:50:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:50:10,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515639128] [2024-09-20 18:50:10,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515639128] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:10,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632929796] [2024-09-20 18:50:10,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:50:10,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:10,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:10,115 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:10,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 18:50:10,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-20 18:50:10,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:10,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 18:50:10,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:50:10,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:50:11,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632929796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:11,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:11,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2024-09-20 18:50:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981123686] [2024-09-20 18:50:11,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:11,028 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 18:50:11,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 18:50:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 18:50:11,031 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-20 18:50:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:11,235 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2024-09-20 18:50:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 18:50:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 109 [2024-09-20 18:50:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:11,236 INFO L225 Difference]: With dead ends: 160 [2024-09-20 18:50:11,237 INFO L226 Difference]: Without dead ends: 113 [2024-09-20 18:50:11,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 205 SyntacticMatches, 25 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 18:50:11,237 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:11,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 396 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-20 18:50:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-09-20 18:50:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 18:50:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2024-09-20 18:50:11,264 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2024-09-20 18:50:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:11,264 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2024-09-20 18:50:11,264 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-20 18:50:11,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2024-09-20 18:50:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-20 18:50:11,265 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:11,265 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:11,278 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 18:50:11,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 18:50:11,465 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:11,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash -54937284, now seen corresponding path program 19 times [2024-09-20 18:50:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:11,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437349525] [2024-09-20 18:50:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:50:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 18:50:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 18:50:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 18:50:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 18:50:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 18:50:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 18:50:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 18:50:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-20 18:50:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 18:50:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-20 18:50:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 18:50:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:50:12,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437349525] [2024-09-20 18:50:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437349525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343247714] [2024-09-20 18:50:12,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:50:12,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:12,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:12,320 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:12,324 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 18:50:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:12,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-20 18:50:12,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:12,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:50:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:50:13,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:13,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:50:13,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:50:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:50:13,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343247714] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:13,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:13,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 32] total 62 [2024-09-20 18:50:13,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124875901] [2024-09-20 18:50:13,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:13,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-20 18:50:13,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-20 18:50:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3592, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:50:13,820 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2024-09-20 18:50:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:14,690 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2024-09-20 18:50:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 18:50:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) Word has length 110 [2024-09-20 18:50:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:14,693 INFO L225 Difference]: With dead ends: 124 [2024-09-20 18:50:14,693 INFO L226 Difference]: Without dead ends: 122 [2024-09-20 18:50:14,694 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 193 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=218, Invalid=4072, Unknown=0, NotChecked=0, Total=4290 [2024-09-20 18:50:14,694 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:14,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 741 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 18:50:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-20 18:50:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2024-09-20 18:50:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 states have internal predecessors, (90), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 18:50:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2024-09-20 18:50:14,720 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 110 [2024-09-20 18:50:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:14,721 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2024-09-20 18:50:14,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2024-09-20 18:50:14,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2024-09-20 18:50:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-20 18:50:14,721 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:14,721 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:14,734 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:14,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 18:50:14,922 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:14,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1102649716, now seen corresponding path program 20 times [2024-09-20 18:50:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181171862] [2024-09-20 18:50:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:14,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:50:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 18:50:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 18:50:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-20 18:50:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 18:50:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 18:50:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 18:50:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 18:50:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-20 18:50:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 18:50:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-20 18:50:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 18:50:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 18:50:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 18:50:15,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181171862] [2024-09-20 18:50:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181171862] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111129051] [2024-09-20 18:50:15,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:15,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:15,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:15,393 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:15,401 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 18:50:15,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:15,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:15,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 18:50:15,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 18:50:15,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 18:50:16,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111129051] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:16,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:16,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2024-09-20 18:50:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551784944] [2024-09-20 18:50:16,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:16,269 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 18:50:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 18:50:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 18:50:16,271 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-20 18:50:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:16,438 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2024-09-20 18:50:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-20 18:50:16,439 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 117 [2024-09-20 18:50:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:16,444 INFO L225 Difference]: With dead ends: 171 [2024-09-20 18:50:16,444 INFO L226 Difference]: Without dead ends: 121 [2024-09-20 18:50:16,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 27 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 18:50:16,445 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:16,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 329 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-20 18:50:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-09-20 18:50:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 18:50:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2024-09-20 18:50:16,504 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2024-09-20 18:50:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:16,505 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2024-09-20 18:50:16,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-20 18:50:16,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2024-09-20 18:50:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-20 18:50:16,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:16,506 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:16,520 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:16,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:16,710 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:16,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1681033130, now seen corresponding path program 21 times [2024-09-20 18:50:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:16,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791795092] [2024-09-20 18:50:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:50:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 18:50:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:50:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 18:50:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 18:50:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-20 18:50:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-20 18:50:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 18:50:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-20 18:50:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-20 18:50:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 18:50:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-20 18:50:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-20 18:50:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 18:50:17,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:17,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791795092] [2024-09-20 18:50:17,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791795092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:17,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840496152] [2024-09-20 18:50:17,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:50:17,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:17,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:17,368 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:17,371 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 18:50:18,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-20 18:50:18,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:18,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 18:50:18,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:18,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 18:50:21,908 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-20 18:50:21,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-20 18:50:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 18:50:21,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:22,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840496152] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:22,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:50:22,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36] total 67 [2024-09-20 18:50:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526793313] [2024-09-20 18:50:22,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:22,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-20 18:50:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-20 18:50:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4218, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:50:22,195 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-20 18:50:26,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:31,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:35,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:39,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:43,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:47,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:51,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:50:55,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:00,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:04,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:08,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:12,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:12,822 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2024-09-20 18:51:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-20 18:51:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 118 [2024-09-20 18:51:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:12,823 INFO L225 Difference]: With dead ends: 225 [2024-09-20 18:51:12,823 INFO L226 Difference]: Without dead ends: 131 [2024-09-20 18:51:12,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 93 SyntacticMatches, 27 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1012, Invalid=12794, Unknown=0, NotChecked=0, Total=13806 [2024-09-20 18:51:12,825 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 37 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:12,825 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 520 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2403 Invalid, 12 Unknown, 0 Unchecked, 49.1s Time] [2024-09-20 18:51:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-20 18:51:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-20 18:51:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 96 states have internal predecessors, (97), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 18:51:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2024-09-20 18:51:12,859 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 118 [2024-09-20 18:51:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:12,859 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2024-09-20 18:51:12,860 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-20 18:51:12,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2024-09-20 18:51:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-20 18:51:12,861 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:12,861 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:12,874 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:13,061 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 18:51:13,061 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:13,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1231766396, now seen corresponding path program 22 times [2024-09-20 18:51:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:13,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118067352] [2024-09-20 18:51:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:13,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 18:51:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 18:51:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 18:51:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 18:51:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 18:51:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:51:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-20 18:51:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-20 18:51:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 18:51:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-20 18:51:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 18:51:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-20 18:51:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-20 18:51:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-20 18:51:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-20 18:51:13,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:13,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118067352] [2024-09-20 18:51:13,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118067352] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:13,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063899077] [2024-09-20 18:51:13,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:51:13,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:13,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:13,878 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:51:13,883 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 18:51:14,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:51:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:14,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 18:51:14,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:14,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 18:51:18,688 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-20 18:51:18,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-20 18:51:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 287 proven. 162 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-20 18:51:18,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:19,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063899077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:19,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:51:19,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38] total 71 [2024-09-20 18:51:19,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091801617] [2024-09-20 18:51:19,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:19,001 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-20 18:51:19,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-20 18:51:19,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=4728, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 18:51:19,003 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-20 18:51:24,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:28,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:32,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:36,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:39,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:44,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:48,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:52,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:51:56,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:52:00,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:52:04,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:52:09,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:52:13,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 18:52:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:13,843 INFO L93 Difference]: Finished difference Result 236 states and 241 transitions. [2024-09-20 18:52:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-20 18:52:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 126 [2024-09-20 18:52:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:13,846 INFO L225 Difference]: With dead ends: 236 [2024-09-20 18:52:13,846 INFO L226 Difference]: Without dead ends: 139 [2024-09-20 18:52:13,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 99 SyntacticMatches, 29 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1108, Invalid=14144, Unknown=0, NotChecked=0, Total=15252 [2024-09-20 18:52:13,848 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 3805 mSolverCounterSat, 24 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 3841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3805 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:13,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 681 Invalid, 3841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3805 Invalid, 12 Unknown, 0 Unchecked, 53.0s Time] [2024-09-20 18:52:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-20 18:52:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2024-09-20 18:52:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 18:52:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2024-09-20 18:52:13,880 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 126 [2024-09-20 18:52:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:13,880 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2024-09-20 18:52:13,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-20 18:52:13,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2024-09-20 18:52:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-20 18:52:13,881 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:13,881 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:13,895 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 18:52:14,081 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 18:52:14,082 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:14,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash 191035754, now seen corresponding path program 23 times [2024-09-20 18:52:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78131251] [2024-09-20 18:52:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:52:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:52:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 18:52:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 18:52:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 18:52:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 18:52:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 18:52:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 18:52:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 18:52:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-20 18:52:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 18:52:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-20 18:52:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-20 18:52:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-20 18:52:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-20 18:52:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 18:52:14,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:14,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78131251] [2024-09-20 18:52:14,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78131251] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:14,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218212277] [2024-09-20 18:52:14,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:52:14,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:14,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:14,917 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:14,918 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 18:52:15,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-20 18:52:15,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:15,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-20 18:52:15,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:15,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 18:52:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 18:52:17,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:18,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:52:18,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:52:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 18:52:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218212277] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:18,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:18,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 38] total 75 [2024-09-20 18:52:18,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734951021] [2024-09-20 18:52:18,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:18,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-20 18:52:18,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-20 18:52:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5316, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 18:52:18,209 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-20 18:52:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:19,634 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2024-09-20 18:52:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 18:52:19,634 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 134 [2024-09-20 18:52:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:19,635 INFO L225 Difference]: With dead ends: 148 [2024-09-20 18:52:19,635 INFO L226 Difference]: Without dead ends: 146 [2024-09-20 18:52:19,636 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 234 SyntacticMatches, 31 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=262, Invalid=5900, Unknown=0, NotChecked=0, Total=6162 [2024-09-20 18:52:19,636 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 3884 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:19,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 942 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3884 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 18:52:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-20 18:52:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2024-09-20 18:52:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 107 states have internal predecessors, (108), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 18:52:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2024-09-20 18:52:19,674 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2024-09-20 18:52:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:19,674 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2024-09-20 18:52:19,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-20 18:52:19,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2024-09-20 18:52:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-09-20 18:52:19,675 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:19,676 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:19,690 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-20 18:52:19,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 18:52:19,876 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:19,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2060732770, now seen corresponding path program 24 times [2024-09-20 18:52:19,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:19,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015272147] [2024-09-20 18:52:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:52:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:52:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 18:52:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 18:52:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-20 18:52:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 18:52:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 18:52:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 18:52:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 18:52:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-20 18:52:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 18:52:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-20 18:52:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-20 18:52:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-20 18:52:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-20 18:52:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2024-09-20 18:52:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:52:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015272147] [2024-09-20 18:52:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015272147] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790837649] [2024-09-20 18:52:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:52:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:20,555 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:20,556 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 18:52:20,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-09-20 18:52:20,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:20,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:52:20,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:52:21,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:52:21,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790837649] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:21,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:21,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2024-09-20 18:52:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077082989] [2024-09-20 18:52:21,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:21,899 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 18:52:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 18:52:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 18:52:21,901 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-20 18:52:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:22,137 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2024-09-20 18:52:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-20 18:52:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 141 [2024-09-20 18:52:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:22,138 INFO L225 Difference]: With dead ends: 204 [2024-09-20 18:52:22,139 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 18:52:22,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 265 SyntacticMatches, 33 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 18:52:22,139 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:22,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 266 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:52:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 18:52:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2024-09-20 18:52:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 18:52:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2024-09-20 18:52:22,192 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2024-09-20 18:52:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:22,192 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2024-09-20 18:52:22,195 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-20 18:52:22,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2024-09-20 18:52:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 18:52:22,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:22,196 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:22,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-20 18:52:22,399 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 18:52:22,400 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:22,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1204986436, now seen corresponding path program 25 times [2024-09-20 18:52:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:22,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788471629] [2024-09-20 18:52:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat