./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-ll.c -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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:18:09,067 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:18:09,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:18:09,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:18:09,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:18:09,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:18:09,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:18:09,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:18:09,167 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:18:09,167 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:18:09,167 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:18:09,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:18:09,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:18:09,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:18:09,172 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:18:09,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:18:09,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:18:09,174 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:18:09,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:18:09,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:18:09,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:18:09,178 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:18:09,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:18:09,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:18:09,179 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:18:09,179 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:18:09,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:18:09,180 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:18:09,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:18:09,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:18:09,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:18:09,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:18:09,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:18:09,181 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:18:09,181 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:18:09,182 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:18:09,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:18:09,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:18:09,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:18:09,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:18:09,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:18:09,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:18:09,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:18:09,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:18:09,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:18:09,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:18:09,481 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:18:09,481 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:18:09,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-20 12:18:10,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:18:11,123 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:18:11,123 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-20 12:18:11,131 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ddbc903b6/74315e5670e84aa3a8ab754e94fbaf94/FLAG5e03d94c5 [2024-09-20 12:18:11,150 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ddbc903b6/74315e5670e84aa3a8ab754e94fbaf94 [2024-09-20 12:18:11,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:18:11,158 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:18:11,161 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:18:11,161 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:18:11,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:18:11,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc1a59d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11, skipping insertion in model container [2024-09-20 12:18:11,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,189 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:18:11,347 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/nla-digbench/egcd3-ll.c[490,503] [2024-09-20 12:18:11,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:18:11,375 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:18:11,391 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/nla-digbench/egcd3-ll.c[490,503] [2024-09-20 12:18:11,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:18:11,415 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:18:11,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11 WrapperNode [2024-09-20 12:18:11,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:18:11,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:18:11,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:18:11,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:18:11,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,434 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:18:11,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:18:11,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:18:11,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:18:11,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:18:11,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,448 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,460 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 12:18:11,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,461 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,464 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,468 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,470 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:18:11,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:18:11,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:18:11,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:18:11,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (1/1) ... [2024-09-20 12:18:11,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:18:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:11,509 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 12:18:11,512 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 12:18:11,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:18:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:18:11,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:18:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:18:11,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:18:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:18:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:18:11,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:18:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:18:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:18:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:18:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:18:11,614 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:18:11,616 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:18:11,826 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:18:11,826 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:18:11,862 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:18:11,862 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 12:18:11,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:18:11 BoogieIcfgContainer [2024-09-20 12:18:11,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:18:11,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:18:11,865 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:18:11,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:18:11,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:18:11" (1/3) ... [2024-09-20 12:18:11,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4450cede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:18:11, skipping insertion in model container [2024-09-20 12:18:11,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:18:11" (2/3) ... [2024-09-20 12:18:11,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4450cede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:18:11, skipping insertion in model container [2024-09-20 12:18:11,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:18:11" (3/3) ... [2024-09-20 12:18:11,871 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2024-09-20 12:18:11,887 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:18:11,887 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:18:11,937 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:18:11,943 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;@6a497a5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:18:11,944 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:18:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:18:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 12:18:11,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:11,956 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 12:18:11,957 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:11,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 48210315, now seen corresponding path program 1 times [2024-09-20 12:18:11,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:11,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333392872] [2024-09-20 12:18:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:18:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:18:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:18:12,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333392872] [2024-09-20 12:18:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333392872] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:12,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:12,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:18:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527387836] [2024-09-20 12:18:12,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:12,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:18:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:18:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:18:12,228 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:12,264 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2024-09-20 12:18:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:18:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-20 12:18:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:12,280 INFO L225 Difference]: With dead ends: 64 [2024-09-20 12:18:12,280 INFO L226 Difference]: Without dead ends: 31 [2024-09-20 12:18:12,285 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 12:18:12,290 INFO L434 NwaCegarLoop]: 40 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, 40 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 12:18:12,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:18:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-20 12:18:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-20 12:18:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:18:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-09-20 12:18:12,339 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 21 [2024-09-20 12:18:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:12,341 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-09-20 12:18:12,341 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:12,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-09-20 12:18:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:18:12,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:12,346 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:12,346 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:18:12,347 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:12,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash -190498723, now seen corresponding path program 1 times [2024-09-20 12:18:12,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:12,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548989547] [2024-09-20 12:18:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:18:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:18:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:18:12,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548989547] [2024-09-20 12:18:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548989547] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:12,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:12,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 12:18:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511808001] [2024-09-20 12:18:12,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:12,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 12:18:12,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 12:18:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:18:12,670 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:12,779 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2024-09-20 12:18:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:18:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-20 12:18:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:12,781 INFO L225 Difference]: With dead ends: 50 [2024-09-20 12:18:12,781 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 12:18:12,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:18:12,783 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:12,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 124 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:18:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 12:18:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-09-20 12:18:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:18:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-20 12:18:12,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-09-20 12:18:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:12,802 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-20 12:18:12,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:12,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-20 12:18:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:18:12,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:12,805 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:12,805 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:18:12,805 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:12,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash -832406041, now seen corresponding path program 1 times [2024-09-20 12:18:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802209750] [2024-09-20 12:18:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:12,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35589416] [2024-09-20 12:18:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:12,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:12,840 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 12:18:12,842 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 12:18:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:12,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:18:12,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:18:13,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:18:13,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:13,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802209750] [2024-09-20 12:18:13,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:13,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35589416] [2024-09-20 12:18:13,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35589416] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:13,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:18:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230296490] [2024-09-20 12:18:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:13,058 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:18:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:18:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:18:13,060 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:13,135 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-20 12:18:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:18:13,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-20 12:18:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:13,140 INFO L225 Difference]: With dead ends: 49 [2024-09-20 12:18:13,140 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 12:18:13,140 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:18:13,141 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:13,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:18:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 12:18:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-20 12:18:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 12:18:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-20 12:18:13,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2024-09-20 12:18:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:13,165 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-20 12:18:13,166 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:13,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-20 12:18:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:18:13,167 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:13,167 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:13,181 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:18:13,368 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 12:18:13,368 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:13,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash -143490539, now seen corresponding path program 1 times [2024-09-20 12:18:13,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:13,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584900906] [2024-09-20 12:18:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:13,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:13,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:13,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:18:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:13,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:18:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:18:13,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:13,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584900906] [2024-09-20 12:18:13,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584900906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:13,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143608665] [2024-09-20 12:18:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:13,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:13,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:13,564 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 12:18:13,566 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 12:18:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:13,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:18:13,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:18:13,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:18:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143608665] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:13,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-20 12:18:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738785437] [2024-09-20 12:18:13,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:13,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:18:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:18:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:18:13,780 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:13,997 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2024-09-20 12:18:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:18:13,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-20 12:18:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:13,999 INFO L225 Difference]: With dead ends: 99 [2024-09-20 12:18:13,999 INFO L226 Difference]: Without dead ends: 92 [2024-09-20 12:18:13,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:18:14,000 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:14,001 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 267 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:18:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-20 12:18:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-09-20 12:18:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 12:18:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2024-09-20 12:18:14,033 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 27 [2024-09-20 12:18:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:14,033 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2024-09-20 12:18:14,034 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:14,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2024-09-20 12:18:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 12:18:14,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:14,035 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:14,051 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 12:18:14,235 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 12:18:14,236 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:14,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash -849404633, now seen corresponding path program 1 times [2024-09-20 12:18:14,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:14,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503269851] [2024-09-20 12:18:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:14,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347296303] [2024-09-20 12:18:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:14,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:14,253 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 12:18:14,256 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 12:18:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:14,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:18:14,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:18:14,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:18:14,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:14,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503269851] [2024-09-20 12:18:14,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347296303] [2024-09-20 12:18:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347296303] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:14,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:14,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:18:14,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221589219] [2024-09-20 12:18:14,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:14,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:18:14,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:18:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:18:14,391 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:18:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:14,471 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-09-20 12:18:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:18:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-20 12:18:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:14,473 INFO L225 Difference]: With dead ends: 75 [2024-09-20 12:18:14,474 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 12:18:14,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:18:14,475 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:14,475 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:18:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 12:18:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-20 12:18:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 12:18:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-09-20 12:18:14,494 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 30 [2024-09-20 12:18:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:14,494 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-09-20 12:18:14,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:18:14,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-09-20 12:18:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 12:18:14,496 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:14,496 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:14,514 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:18:14,700 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 12:18:14,701 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:14,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash -570934993, now seen corresponding path program 1 times [2024-09-20 12:18:14,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:14,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561179651] [2024-09-20 12:18:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:14,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826792021] [2024-09-20 12:18:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:14,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:14,727 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 12:18:14,728 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 12:18:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:14,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:18:14,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:18:14,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:18:15,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561179651] [2024-09-20 12:18:15,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826792021] [2024-09-20 12:18:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826792021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:15,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:18:15,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-09-20 12:18:15,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83932335] [2024-09-20 12:18:15,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:15,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:18:15,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:15,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:18:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:18:15,012 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:15,187 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2024-09-20 12:18:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:18:15,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-09-20 12:18:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:15,189 INFO L225 Difference]: With dead ends: 107 [2024-09-20 12:18:15,189 INFO L226 Difference]: Without dead ends: 105 [2024-09-20 12:18:15,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:18:15,190 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:15,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 243 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:18:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-20 12:18:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-09-20 12:18:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 12:18:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-20 12:18:15,229 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 30 [2024-09-20 12:18:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:15,232 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-20 12:18:15,232 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:15,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-20 12:18:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 12:18:15,233 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:15,233 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:15,252 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 12:18:15,433 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 12:18:15,434 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:15,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:15,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1950278233, now seen corresponding path program 1 times [2024-09-20 12:18:15,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294790440] [2024-09-20 12:18:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:15,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:15,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712924468] [2024-09-20 12:18:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:15,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:15,448 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 12:18:15,449 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 12:18:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:15,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:18:15,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:18:15,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:18:15,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:15,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294790440] [2024-09-20 12:18:15,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:15,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712924468] [2024-09-20 12:18:15,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712924468] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:15,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:15,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:18:15,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341392559] [2024-09-20 12:18:15,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:15,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:18:15,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:18:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:18:15,552 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:18:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:15,634 INFO L93 Difference]: Finished difference Result 147 states and 207 transitions. [2024-09-20 12:18:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:18:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2024-09-20 12:18:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:15,638 INFO L225 Difference]: With dead ends: 147 [2024-09-20 12:18:15,638 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 12:18:15,639 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:18:15,641 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 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 12:18:15,642 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:18:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 12:18:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-09-20 12:18:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-20 12:18:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 199 transitions. [2024-09-20 12:18:15,694 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 199 transitions. Word has length 35 [2024-09-20 12:18:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:15,694 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 199 transitions. [2024-09-20 12:18:15,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:18:15,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 199 transitions. [2024-09-20 12:18:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 12:18:15,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:15,698 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:15,716 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 12:18:15,902 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 12:18:15,903 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:15,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash -939315489, now seen corresponding path program 1 times [2024-09-20 12:18:15,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:15,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352754066] [2024-09-20 12:18:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:15,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:15,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462039034] [2024-09-20 12:18:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:15,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:15,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:15,961 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 12:18:15,963 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 12:18:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:16,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:18:16,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:18:16,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352754066] [2024-09-20 12:18:16,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462039034] [2024-09-20 12:18:16,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462039034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:16,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:18:16,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-20 12:18:16,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254343691] [2024-09-20 12:18:16,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:16,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:18:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:18:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:18:16,251 INFO L87 Difference]: Start difference. First operand 139 states and 199 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:18:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:16,426 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2024-09-20 12:18:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:18:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-09-20 12:18:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:16,429 INFO L225 Difference]: With dead ends: 152 [2024-09-20 12:18:16,429 INFO L226 Difference]: Without dead ends: 150 [2024-09-20 12:18:16,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:18:16,430 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:16,431 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 191 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:18:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-20 12:18:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-09-20 12:18:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 93 states have internal predecessors, (117), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-20 12:18:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 205 transitions. [2024-09-20 12:18:16,469 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 205 transitions. Word has length 35 [2024-09-20 12:18:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:16,470 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 205 transitions. [2024-09-20 12:18:16,470 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:18:16,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 205 transitions. [2024-09-20 12:18:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 12:18:16,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:16,472 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:16,491 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 12:18:16,677 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 12:18:16,678 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:16,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash -660845849, now seen corresponding path program 2 times [2024-09-20 12:18:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:16,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844909559] [2024-09-20 12:18:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:16,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:16,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:16,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:18:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:16,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:18:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:18:16,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:16,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844909559] [2024-09-20 12:18:16,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844909559] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:16,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:18:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987849948] [2024-09-20 12:18:16,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:16,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:18:16,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:18:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:18:16,779 INFO L87 Difference]: Start difference. First operand 147 states and 205 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:16,898 INFO L93 Difference]: Finished difference Result 186 states and 257 transitions. [2024-09-20 12:18:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:18:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-20 12:18:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:16,903 INFO L225 Difference]: With dead ends: 186 [2024-09-20 12:18:16,903 INFO L226 Difference]: Without dead ends: 130 [2024-09-20 12:18:16,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:18:16,905 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:16,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:18:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-20 12:18:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-09-20 12:18:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 37 states have call successors, (37), 10 states have call predecessors, (37), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-20 12:18:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2024-09-20 12:18:16,959 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 35 [2024-09-20 12:18:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:16,960 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2024-09-20 12:18:16,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:18:16,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2024-09-20 12:18:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:18:16,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:16,966 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:16,966 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-20 12:18:16,967 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:16,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1428718823, now seen corresponding path program 1 times [2024-09-20 12:18:16,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:16,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238180560] [2024-09-20 12:18:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:16,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685292382] [2024-09-20 12:18:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:16,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:16,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:16,984 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 12:18:16,986 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 12:18:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:17,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:18:17,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 12:18:17,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:18:17,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:17,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238180560] [2024-09-20 12:18:17,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:17,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685292382] [2024-09-20 12:18:17,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685292382] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:17,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:17,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:18:17,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334781656] [2024-09-20 12:18:17,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:17,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:18:17,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:17,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:18:17,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:18:17,078 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:18:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:17,160 INFO L93 Difference]: Finished difference Result 180 states and 260 transitions. [2024-09-20 12:18:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:18:17,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2024-09-20 12:18:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:17,162 INFO L225 Difference]: With dead ends: 180 [2024-09-20 12:18:17,163 INFO L226 Difference]: Without dead ends: 178 [2024-09-20 12:18:17,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:18:17,164 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:17,164 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:18:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-20 12:18:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-09-20 12:18:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-20 12:18:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2024-09-20 12:18:17,209 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 40 [2024-09-20 12:18:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:17,209 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2024-09-20 12:18:17,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:18:17,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2024-09-20 12:18:17,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 12:18:17,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:17,213 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:17,226 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 12:18:17,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:17,416 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:17,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash -262492089, now seen corresponding path program 1 times [2024-09-20 12:18:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:17,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388047271] [2024-09-20 12:18:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:17,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:17,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069588475] [2024-09-20 12:18:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:17,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:17,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:17,433 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 12:18:17,441 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 12:18:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:17,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 12:18:17,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 12:18:18,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 12:18:19,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:19,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388047271] [2024-09-20 12:18:19,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:19,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069588475] [2024-09-20 12:18:19,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069588475] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:19,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:18:19,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 12:18:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420404134] [2024-09-20 12:18:19,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:19,685 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:18:19,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:18:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:18:19,687 INFO L87 Difference]: Start difference. First operand 166 states and 238 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 12:18:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:23,645 INFO L93 Difference]: Finished difference Result 445 states and 663 transitions. [2024-09-20 12:18:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:18:23,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 52 [2024-09-20 12:18:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:23,651 INFO L225 Difference]: With dead ends: 445 [2024-09-20 12:18:23,651 INFO L226 Difference]: Without dead ends: 342 [2024-09-20 12:18:23,653 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:18:23,654 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 170 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:23,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 408 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-20 12:18:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-20 12:18:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-09-20 12:18:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 156 states have internal predecessors, (180), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-20 12:18:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 364 transitions. [2024-09-20 12:18:23,789 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 364 transitions. Word has length 52 [2024-09-20 12:18:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:23,790 INFO L474 AbstractCegarLoop]: Abstraction has 256 states and 364 transitions. [2024-09-20 12:18:23,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 12:18:23,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 364 transitions. [2024-09-20 12:18:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 12:18:23,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:23,792 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:23,808 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 12:18:23,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:23,997 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:23,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1924337224, now seen corresponding path program 1 times [2024-09-20 12:18:23,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:23,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575009652] [2024-09-20 12:18:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:23,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:24,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530711139] [2024-09-20 12:18:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:24,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:24,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:24,014 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 12:18:24,017 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 12:18:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:24,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:18:24,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-09-20 12:18:24,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-20 12:18:24,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:24,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575009652] [2024-09-20 12:18:24,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:24,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530711139] [2024-09-20 12:18:24,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530711139] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:24,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:18:24,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 12:18:24,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852120454] [2024-09-20 12:18:24,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:24,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:18:24,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:24,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:18:24,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:18:24,228 INFO L87 Difference]: Start difference. First operand 256 states and 364 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:18:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:24,387 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2024-09-20 12:18:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:18:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2024-09-20 12:18:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:24,390 INFO L225 Difference]: With dead ends: 262 [2024-09-20 12:18:24,390 INFO L226 Difference]: Without dead ends: 260 [2024-09-20 12:18:24,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:18:24,393 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:24,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:18:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-20 12:18:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-09-20 12:18:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 159 states have internal predecessors, (183), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-20 12:18:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 367 transitions. [2024-09-20 12:18:24,539 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 367 transitions. Word has length 62 [2024-09-20 12:18:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:24,539 INFO L474 AbstractCegarLoop]: Abstraction has 260 states and 367 transitions. [2024-09-20 12:18:24,539 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:18:24,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 367 transitions. [2024-09-20 12:18:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 12:18:24,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:24,541 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:24,558 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 12:18:24,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 12:18:24,745 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:24,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1180380411, now seen corresponding path program 1 times [2024-09-20 12:18:24,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:24,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437659795] [2024-09-20 12:18:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:24,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:24,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926217038] [2024-09-20 12:18:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:24,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:24,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:24,773 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 12:18:24,776 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 12:18:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:24,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 12:18:24,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 12:18:25,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:25,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437659795] [2024-09-20 12:18:25,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:25,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926217038] [2024-09-20 12:18:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926217038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:25,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:18:25,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 12:18:25,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602701051] [2024-09-20 12:18:25,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:25,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:18:25,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:18:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:18:25,367 INFO L87 Difference]: Start difference. First operand 260 states and 367 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 12:18:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:26,047 INFO L93 Difference]: Finished difference Result 318 states and 454 transitions. [2024-09-20 12:18:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:18:26,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-09-20 12:18:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:26,051 INFO L225 Difference]: With dead ends: 318 [2024-09-20 12:18:26,051 INFO L226 Difference]: Without dead ends: 316 [2024-09-20 12:18:26,051 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:18:26,053 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:26,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 443 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:18:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-20 12:18:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2024-09-20 12:18:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 178 states have (on average 1.2078651685393258) internal successors, (215), 188 states have internal predecessors, (215), 117 states have call successors, (117), 16 states have call predecessors, (117), 15 states have return successors, (115), 106 states have call predecessors, (115), 115 states have call successors, (115) [2024-09-20 12:18:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 447 transitions. [2024-09-20 12:18:26,229 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 447 transitions. Word has length 60 [2024-09-20 12:18:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:26,229 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 447 transitions. [2024-09-20 12:18:26,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 12:18:26,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 447 transitions. [2024-09-20 12:18:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 12:18:26,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:26,231 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:26,248 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 12:18:26,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 12:18:26,432 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:26,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1640416879, now seen corresponding path program 2 times [2024-09-20 12:18:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:26,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578321913] [2024-09-20 12:18:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:26,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:18:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:18:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:18:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:18:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 12:18:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:18:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:18:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:18:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-20 12:18:26,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578321913] [2024-09-20 12:18:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578321913] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:18:26,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:18:26,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:18:26,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419466834] [2024-09-20 12:18:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:18:26,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:18:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:18:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:18:26,551 INFO L87 Difference]: Start difference. First operand 311 states and 447 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 12:18:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:26,772 INFO L93 Difference]: Finished difference Result 534 states and 771 transitions. [2024-09-20 12:18:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:18:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2024-09-20 12:18:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:26,778 INFO L225 Difference]: With dead ends: 534 [2024-09-20 12:18:26,779 INFO L226 Difference]: Without dead ends: 320 [2024-09-20 12:18:26,780 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:18:26,781 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:26,781 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:18:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-09-20 12:18:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 308. [2024-09-20 12:18:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 184 states have internal predecessors, (221), 109 states have call successors, (109), 16 states have call predecessors, (109), 15 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-20 12:18:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 437 transitions. [2024-09-20 12:18:26,950 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 437 transitions. Word has length 65 [2024-09-20 12:18:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:26,951 INFO L474 AbstractCegarLoop]: Abstraction has 308 states and 437 transitions. [2024-09-20 12:18:26,951 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 12:18:26,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 437 transitions. [2024-09-20 12:18:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 12:18:26,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:26,953 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:26,953 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-20 12:18:26,953 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:26,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash -629454135, now seen corresponding path program 3 times [2024-09-20 12:18:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:26,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234042990] [2024-09-20 12:18:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546685145] [2024-09-20 12:18:26,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:18:26,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:26,994 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 12:18:26,995 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 12:18:27,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 12:18:27,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:27,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-20 12:18:27,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 12:18:27,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:32,081 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~k~0) c_main_~c~0 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (forall ((v_main_~p~0_23 Int) (v_main_~r~0_23 Int)) (or (< (+ (* v_main_~p~0_23 c_main_~x~0) (* v_main_~r~0_23 c_main_~y~0)) c_main_~b~0) (< c_main_~q~0 v_main_~p~0_23) (< c_main_~s~0 v_main_~r~0_23)))) is different from false [2024-09-20 12:18:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234042990] [2024-09-20 12:18:32,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546685145] [2024-09-20 12:18:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546685145] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:32,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:18:32,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-20 12:18:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886482851] [2024-09-20 12:18:32,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:32,871 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:18:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:18:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=462, Unknown=1, NotChecked=44, Total=600 [2024-09-20 12:18:32,873 INFO L87 Difference]: Start difference. First operand 308 states and 437 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 12:18:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:33,609 INFO L93 Difference]: Finished difference Result 336 states and 461 transitions. [2024-09-20 12:18:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:18:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 65 [2024-09-20 12:18:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:33,613 INFO L225 Difference]: With dead ends: 336 [2024-09-20 12:18:33,613 INFO L226 Difference]: Without dead ends: 334 [2024-09-20 12:18:33,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=155, Invalid=778, Unknown=1, NotChecked=58, Total=992 [2024-09-20 12:18:33,614 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:33,614 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 441 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:18:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-09-20 12:18:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2024-09-20 12:18:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 196 states have internal predecessors, (233), 109 states have call successors, (109), 20 states have call predecessors, (109), 19 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-20 12:18:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 449 transitions. [2024-09-20 12:18:33,764 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 449 transitions. Word has length 65 [2024-09-20 12:18:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:33,765 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 449 transitions. [2024-09-20 12:18:33,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 12:18:33,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 449 transitions. [2024-09-20 12:18:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 12:18:33,766 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:33,766 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:33,782 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 12:18:33,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:18:33,967 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:33,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:33,967 INFO L85 PathProgramCache]: Analyzing trace with hash -232813088, now seen corresponding path program 1 times [2024-09-20 12:18:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327100722] [2024-09-20 12:18:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225524419] [2024-09-20 12:18:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:33,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:33,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:33,994 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 12:18:33,996 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 12:18:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:34,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-20 12:18:34,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-20 12:18:34,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:36,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:36,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327100722] [2024-09-20 12:18:36,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:36,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225524419] [2024-09-20 12:18:36,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225524419] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:36,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:18:36,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 12:18:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626764924] [2024-09-20 12:18:36,435 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:36,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:18:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:18:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:18:36,436 INFO L87 Difference]: Start difference. First operand 324 states and 449 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-20 12:18:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:37,640 INFO L93 Difference]: Finished difference Result 400 states and 561 transitions. [2024-09-20 12:18:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 12:18:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 79 [2024-09-20 12:18:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:37,643 INFO L225 Difference]: With dead ends: 400 [2024-09-20 12:18:37,643 INFO L226 Difference]: Without dead ends: 397 [2024-09-20 12:18:37,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:18:37,644 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:37,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 537 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:18:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-09-20 12:18:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2024-09-20 12:18:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 226 states have (on average 1.2079646017699115) internal successors, (273), 227 states have internal predecessors, (273), 137 states have call successors, (137), 22 states have call predecessors, (137), 21 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-20 12:18:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 545 transitions. [2024-09-20 12:18:37,835 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 545 transitions. Word has length 79 [2024-09-20 12:18:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:37,835 INFO L474 AbstractCegarLoop]: Abstraction has 385 states and 545 transitions. [2024-09-20 12:18:37,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-20 12:18:37,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 545 transitions. [2024-09-20 12:18:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-20 12:18:37,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:37,837 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:37,855 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 12:18:38,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:18:38,038 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:38,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -203814726, now seen corresponding path program 1 times [2024-09-20 12:18:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:38,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483380953] [2024-09-20 12:18:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:38,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:38,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689917332] [2024-09-20 12:18:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:38,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:38,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:38,072 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 12:18:38,074 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 12:18:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:38,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 12:18:38,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-20 12:18:38,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-09-20 12:18:38,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483380953] [2024-09-20 12:18:38,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:38,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689917332] [2024-09-20 12:18:38,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689917332] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:38,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:18:38,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-20 12:18:38,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726272978] [2024-09-20 12:18:38,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:38,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:18:38,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:18:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:18:38,761 INFO L87 Difference]: Start difference. First operand 385 states and 545 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-20 12:18:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:40,455 INFO L93 Difference]: Finished difference Result 885 states and 1384 transitions. [2024-09-20 12:18:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 12:18:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 82 [2024-09-20 12:18:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:40,463 INFO L225 Difference]: With dead ends: 885 [2024-09-20 12:18:40,463 INFO L226 Difference]: Without dead ends: 883 [2024-09-20 12:18:40,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 12:18:40,464 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 148 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:40,465 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 436 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:18:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2024-09-20 12:18:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 829. [2024-09-20 12:18:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 403 states have (on average 1.3101736972704714) internal successors, (528), 404 states have internal predecessors, (528), 401 states have call successors, (401), 25 states have call predecessors, (401), 24 states have return successors, (399), 399 states have call predecessors, (399), 399 states have call successors, (399) [2024-09-20 12:18:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1328 transitions. [2024-09-20 12:18:40,915 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1328 transitions. Word has length 82 [2024-09-20 12:18:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:40,916 INFO L474 AbstractCegarLoop]: Abstraction has 829 states and 1328 transitions. [2024-09-20 12:18:40,916 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-20 12:18:40,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1328 transitions. [2024-09-20 12:18:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-20 12:18:40,926 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:40,926 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:40,944 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 12:18:41,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 12:18:41,131 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:41,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash 807148018, now seen corresponding path program 1 times [2024-09-20 12:18:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:41,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749739241] [2024-09-20 12:18:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:41,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001858321] [2024-09-20 12:18:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:41,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:41,154 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 12:18:41,155 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 12:18:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:41,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 12:18:41,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-20 12:18:41,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-09-20 12:18:42,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749739241] [2024-09-20 12:18:42,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001858321] [2024-09-20 12:18:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001858321] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:42,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:18:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 12:18:42,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528160644] [2024-09-20 12:18:42,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:42,990 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:18:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:18:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:18:42,991 INFO L87 Difference]: Start difference. First operand 829 states and 1328 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-20 12:18:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:52,375 INFO L93 Difference]: Finished difference Result 1191 states and 1920 transitions. [2024-09-20 12:18:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 12:18:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 82 [2024-09-20 12:18:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:52,384 INFO L225 Difference]: With dead ends: 1191 [2024-09-20 12:18:52,384 INFO L226 Difference]: Without dead ends: 1189 [2024-09-20 12:18:52,385 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=711, Invalid=2829, Unknown=0, NotChecked=0, Total=3540 [2024-09-20 12:18:52,386 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 160 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:52,386 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 719 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-20 12:18:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2024-09-20 12:18:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1060. [2024-09-20 12:18:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 511 states have (on average 1.3228962818003913) internal successors, (676), 512 states have internal predecessors, (676), 521 states have call successors, (521), 28 states have call predecessors, (521), 27 states have return successors, (519), 519 states have call predecessors, (519), 519 states have call successors, (519) [2024-09-20 12:18:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1716 transitions. [2024-09-20 12:18:53,231 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1716 transitions. Word has length 82 [2024-09-20 12:18:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:53,232 INFO L474 AbstractCegarLoop]: Abstraction has 1060 states and 1716 transitions. [2024-09-20 12:18:53,232 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-20 12:18:53,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1716 transitions. [2024-09-20 12:18:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 12:18:53,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:53,237 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:53,255 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 12:18:53,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 12:18:53,442 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:53,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash 590263059, now seen corresponding path program 4 times [2024-09-20 12:18:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:53,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488462010] [2024-09-20 12:18:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:53,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:18:53,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561444549] [2024-09-20 12:18:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:18:53,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:53,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:53,463 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 12:18:53,465 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 12:18:53,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:18:53,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:53,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 12:18:53,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-20 12:18:55,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-20 12:18:55,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:55,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488462010] [2024-09-20 12:18:55,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:18:55,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561444549] [2024-09-20 12:18:55,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561444549] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:55,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:18:55,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2024-09-20 12:18:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389265227] [2024-09-20 12:18:55,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:55,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:18:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:18:55,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:18:55,790 INFO L87 Difference]: Start difference. First operand 1060 states and 1716 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-20 12:19:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:01,470 INFO L93 Difference]: Finished difference Result 1190 states and 1914 transitions. [2024-09-20 12:19:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:19:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 85 [2024-09-20 12:19:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:01,477 INFO L225 Difference]: With dead ends: 1190 [2024-09-20 12:19:01,477 INFO L226 Difference]: Without dead ends: 1188 [2024-09-20 12:19:01,479 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:19:01,479 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:01,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 584 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-20 12:19:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2024-09-20 12:19:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1080. [2024-09-20 12:19:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 526 states have (on average 1.3136882129277567) internal successors, (691), 527 states have internal predecessors, (691), 521 states have call successors, (521), 33 states have call predecessors, (521), 32 states have return successors, (519), 519 states have call predecessors, (519), 519 states have call successors, (519) [2024-09-20 12:19:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1731 transitions. [2024-09-20 12:19:02,378 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1731 transitions. Word has length 85 [2024-09-20 12:19:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:02,378 INFO L474 AbstractCegarLoop]: Abstraction has 1080 states and 1731 transitions. [2024-09-20 12:19:02,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-20 12:19:02,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1731 transitions. [2024-09-20 12:19:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 12:19:02,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:02,380 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:02,398 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 12:19:02,581 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:02,581 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:02,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1412818839, now seen corresponding path program 2 times [2024-09-20 12:19:02,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:02,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424509506] [2024-09-20 12:19:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:02,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:19:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:19:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:19:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 12:19:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:19:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:19:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-20 12:19:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-20 12:19:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 12:19:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 12:19:02,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424509506] [2024-09-20 12:19:02,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424509506] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493044244] [2024-09-20 12:19:02,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:19:02,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:02,784 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 12:19:02,786 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 12:19:02,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:19:02,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:02,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:19:02,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 12:19:02,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 12:19:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493044244] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:02,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:19:02,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-20 12:19:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099789724] [2024-09-20 12:19:02,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:02,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:19:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:19:02,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:19:02,988 INFO L87 Difference]: Start difference. First operand 1080 states and 1731 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 12:19:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:04,311 INFO L93 Difference]: Finished difference Result 1218 states and 1947 transitions. [2024-09-20 12:19:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:19:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2024-09-20 12:19:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:04,319 INFO L225 Difference]: With dead ends: 1218 [2024-09-20 12:19:04,320 INFO L226 Difference]: Without dead ends: 1211 [2024-09-20 12:19:04,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 194 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:19:04,320 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:04,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 404 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:19:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2024-09-20 12:19:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1049. [2024-09-20 12:19:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 503 states have (on average 1.320079522862823) internal successors, (664), 504 states have internal predecessors, (664), 513 states have call successors, (513), 33 states have call predecessors, (513), 32 states have return successors, (511), 511 states have call predecessors, (511), 511 states have call successors, (511) [2024-09-20 12:19:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1688 transitions. [2024-09-20 12:19:05,217 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1688 transitions. Word has length 87 [2024-09-20 12:19:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:05,217 INFO L474 AbstractCegarLoop]: Abstraction has 1049 states and 1688 transitions. [2024-09-20 12:19:05,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 12:19:05,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1688 transitions. [2024-09-20 12:19:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-20 12:19:05,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:05,220 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:05,235 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 12:19:05,424 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:05,425 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:05,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1409368955, now seen corresponding path program 5 times [2024-09-20 12:19:05,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:05,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879073649] [2024-09-20 12:19:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:05,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787060641] [2024-09-20 12:19:05,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:19:05,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:05,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:05,452 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 12:19:05,453 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 12:19:05,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 12:19:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:05,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-20 12:19:05,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-20 12:19:07,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:08,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:08,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879073649] [2024-09-20 12:19:08,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:08,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787060641] [2024-09-20 12:19:08,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787060641] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:08,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:19:08,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-20 12:19:08,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483227943] [2024-09-20 12:19:08,264 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:08,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:19:08,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:08,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:19:08,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:19:08,265 INFO L87 Difference]: Start difference. First operand 1049 states and 1688 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-20 12:19:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:10,211 INFO L93 Difference]: Finished difference Result 1186 states and 1894 transitions. [2024-09-20 12:19:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:19:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 90 [2024-09-20 12:19:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:10,219 INFO L225 Difference]: With dead ends: 1186 [2024-09-20 12:19:10,220 INFO L226 Difference]: Without dead ends: 1184 [2024-09-20 12:19:10,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 12:19:10,221 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:10,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 459 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:19:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2024-09-20 12:19:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1166. [2024-09-20 12:19:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 560 states have (on average 1.3178571428571428) internal successors, (738), 561 states have internal predecessors, (738), 569 states have call successors, (569), 37 states have call predecessors, (569), 36 states have return successors, (567), 567 states have call predecessors, (567), 567 states have call successors, (567) [2024-09-20 12:19:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1874 transitions. [2024-09-20 12:19:11,370 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1874 transitions. Word has length 90 [2024-09-20 12:19:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:11,370 INFO L474 AbstractCegarLoop]: Abstraction has 1166 states and 1874 transitions. [2024-09-20 12:19:11,370 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-20 12:19:11,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1874 transitions. [2024-09-20 12:19:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-20 12:19:11,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:11,373 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:11,380 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-20 12:19:11,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:11,573 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:11,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1093787319, now seen corresponding path program 2 times [2024-09-20 12:19:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:11,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811837475] [2024-09-20 12:19:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:11,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845209259] [2024-09-20 12:19:11,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:19:11,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:11,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:11,599 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 12:19:11,601 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 12:19:11,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:19:11,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:11,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 12:19:11,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-20 12:19:12,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-20 12:19:14,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:14,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811837475] [2024-09-20 12:19:14,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:14,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845209259] [2024-09-20 12:19:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845209259] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:14,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:19:14,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2024-09-20 12:19:14,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449832311] [2024-09-20 12:19:14,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:14,822 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 12:19:14,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 12:19:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:19:14,823 INFO L87 Difference]: Start difference. First operand 1166 states and 1874 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-20 12:19:29,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:19:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:30,630 INFO L93 Difference]: Finished difference Result 1381 states and 2196 transitions. [2024-09-20 12:19:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-20 12:19:30,631 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 96 [2024-09-20 12:19:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:30,639 INFO L225 Difference]: With dead ends: 1381 [2024-09-20 12:19:30,639 INFO L226 Difference]: Without dead ends: 1373 [2024-09-20 12:19:30,640 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1128, Invalid=4572, Unknown=0, NotChecked=0, Total=5700 [2024-09-20 12:19:30,641 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 232 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:30,641 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 765 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-09-20 12:19:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-09-20 12:19:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1344. [2024-09-20 12:19:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 653 states have (on average 1.3169984686064318) internal successors, (860), 654 states have internal predecessors, (860), 649 states have call successors, (649), 42 states have call predecessors, (649), 41 states have return successors, (647), 647 states have call predecessors, (647), 647 states have call successors, (647) [2024-09-20 12:19:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 2156 transitions. [2024-09-20 12:19:32,017 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 2156 transitions. Word has length 96 [2024-09-20 12:19:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:32,017 INFO L474 AbstractCegarLoop]: Abstraction has 1344 states and 2156 transitions. [2024-09-20 12:19:32,017 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-20 12:19:32,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 2156 transitions. [2024-09-20 12:19:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-20 12:19:32,019 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:32,020 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:32,037 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 12:19:32,220 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 12:19:32,221 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:32,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -187092685, now seen corresponding path program 6 times [2024-09-20 12:19:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:32,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961168963] [2024-09-20 12:19:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:32,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241740717] [2024-09-20 12:19:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:19:32,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:32,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:32,248 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 12:19:32,249 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 12:19:32,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 12:19:32,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:32,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 12:19:32,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-09-20 12:19:36,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:42,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961168963] [2024-09-20 12:19:42,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:42,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241740717] [2024-09-20 12:19:42,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241740717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:42,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:19:42,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 12:19:42,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452072366] [2024-09-20 12:19:42,558 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:42,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 12:19:42,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:42,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 12:19:42,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=819, Unknown=1, NotChecked=0, Total=992 [2024-09-20 12:19:42,560 INFO L87 Difference]: Start difference. First operand 1344 states and 2156 transitions. Second operand has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 12:19:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:45,380 INFO L93 Difference]: Finished difference Result 1474 states and 2358 transitions. [2024-09-20 12:19:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:19:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 95 [2024-09-20 12:19:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:45,390 INFO L225 Difference]: With dead ends: 1474 [2024-09-20 12:19:45,391 INFO L226 Difference]: Without dead ends: 1472 [2024-09-20 12:19:45,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=386, Invalid=1593, Unknown=1, NotChecked=0, Total=1980 [2024-09-20 12:19:45,392 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:45,392 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 363 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:19:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2024-09-20 12:19:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1356. [2024-09-20 12:19:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 662 states have (on average 1.3126888217522659) internal successors, (869), 664 states have internal predecessors, (869), 651 states have call successors, (651), 43 states have call predecessors, (651), 42 states have return successors, (649), 648 states have call predecessors, (649), 649 states have call successors, (649) [2024-09-20 12:19:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2169 transitions. [2024-09-20 12:19:46,737 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2169 transitions. Word has length 95 [2024-09-20 12:19:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:46,737 INFO L474 AbstractCegarLoop]: Abstraction has 1356 states and 2169 transitions. [2024-09-20 12:19:46,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 12:19:46,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2169 transitions. [2024-09-20 12:19:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-20 12:19:46,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:46,739 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:46,746 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 12:19:46,939 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 12:19:46,940 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:46,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1017703828, now seen corresponding path program 3 times [2024-09-20 12:19:46,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:46,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82312047] [2024-09-20 12:19:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:46,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:46,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006120928] [2024-09-20 12:19:46,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:19:46,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:46,955 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 12:19:46,956 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 12:19:47,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:19:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:47,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-20 12:19:47,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-20 12:19:47,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-20 12:19:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82312047] [2024-09-20 12:19:51,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006120928] [2024-09-20 12:19:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006120928] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:51,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:19:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2024-09-20 12:19:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599771469] [2024-09-20 12:19:51,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:51,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 12:19:51,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 12:19:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:19:51,164 INFO L87 Difference]: Start difference. First operand 1356 states and 2169 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-20 12:20:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:20:09,496 INFO L93 Difference]: Finished difference Result 2168 states and 3461 transitions. [2024-09-20 12:20:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-20 12:20:09,496 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 99 [2024-09-20 12:20:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:20:09,506 INFO L225 Difference]: With dead ends: 2168 [2024-09-20 12:20:09,506 INFO L226 Difference]: Without dead ends: 1621 [2024-09-20 12:20:09,511 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1791, Invalid=7715, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 12:20:09,512 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 255 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:20:09,512 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 761 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-09-20 12:20:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2024-09-20 12:20:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1481. [2024-09-20 12:20:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 723 states have (on average 1.3084370677731674) internal successors, (946), 725 states have internal predecessors, (946), 711 states have call successors, (711), 47 states have call predecessors, (711), 46 states have return successors, (709), 708 states have call predecessors, (709), 709 states have call successors, (709) [2024-09-20 12:20:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2366 transitions. [2024-09-20 12:20:11,187 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2366 transitions. Word has length 99 [2024-09-20 12:20:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:20:11,187 INFO L474 AbstractCegarLoop]: Abstraction has 1481 states and 2366 transitions. [2024-09-20 12:20:11,187 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-20 12:20:11,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:20:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2366 transitions. [2024-09-20 12:20:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-20 12:20:11,189 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:20:11,189 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:20:11,196 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 12:20:11,389 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 12:20:11,390 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:20:11,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:20:11,390 INFO L85 PathProgramCache]: Analyzing trace with hash -396138734, now seen corresponding path program 4 times [2024-09-20 12:20:11,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:20:11,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009668892] [2024-09-20 12:20:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:20:11,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:20:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:20:11,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626737810] [2024-09-20 12:20:11,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:20:11,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:20:11,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:20:11,410 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 12:20:11,411 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 12:20:11,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:20:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:20:11,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-20 12:20:11,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:20:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 52 proven. 46 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-20 12:20:13,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:20:22,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:20:22,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009668892] [2024-09-20 12:20:22,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:20:22,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626737810] [2024-09-20 12:20:22,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626737810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:20:22,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:20:22,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 12:20:22,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513970289] [2024-09-20 12:20:22,220 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:20:22,220 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:20:22,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:20:22,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:20:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:20:22,222 INFO L87 Difference]: Start difference. First operand 1481 states and 2366 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-20 12:20:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:20:26,336 INFO L93 Difference]: Finished difference Result 1613 states and 2569 transitions. [2024-09-20 12:20:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:20:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 104 [2024-09-20 12:20:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:20:26,347 INFO L225 Difference]: With dead ends: 1613 [2024-09-20 12:20:26,347 INFO L226 Difference]: Without dead ends: 1606 [2024-09-20 12:20:26,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 12:20:26,349 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 84 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:20:26,349 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 711 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 12:20:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2024-09-20 12:20:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1485. [2024-09-20 12:20:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 726 states have (on average 1.3071625344352618) internal successors, (949), 728 states have internal predecessors, (949), 711 states have call successors, (711), 48 states have call predecessors, (711), 47 states have return successors, (709), 708 states have call predecessors, (709), 709 states have call successors, (709) [2024-09-20 12:20:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2369 transitions. [2024-09-20 12:20:28,093 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2369 transitions. Word has length 104 [2024-09-20 12:20:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:20:28,093 INFO L474 AbstractCegarLoop]: Abstraction has 1485 states and 2369 transitions. [2024-09-20 12:20:28,094 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-20 12:20:28,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:20:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2369 transitions. [2024-09-20 12:20:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 12:20:28,096 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:20:28,096 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:20:28,114 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 12:20:28,297 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 12:20:28,297 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:20:28,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:20:28,297 INFO L85 PathProgramCache]: Analyzing trace with hash 920643019, now seen corresponding path program 2 times [2024-09-20 12:20:28,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:20:28,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128194365] [2024-09-20 12:20:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:20:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:20:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:20:28,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141840854] [2024-09-20 12:20:28,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:20:28,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:20:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:20:28,320 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 12:20:28,321 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 12:20:28,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:20:28,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:20:28,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-20 12:20:28,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:20:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 52 proven. 56 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-20 12:20:29,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:20:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-20 12:20:34,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:20:34,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128194365] [2024-09-20 12:20:34,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:20:34,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141840854] [2024-09-20 12:20:34,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141840854] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:20:34,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:20:34,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-09-20 12:20:34,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837549246] [2024-09-20 12:20:34,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:20:34,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 12:20:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:20:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 12:20:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:20:34,628 INFO L87 Difference]: Start difference. First operand 1485 states and 2369 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-20 12:20:38,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:20:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:20:54,332 INFO L93 Difference]: Finished difference Result 1742 states and 2731 transitions. [2024-09-20 12:20:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-20 12:20:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 109 [2024-09-20 12:20:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:20:54,345 INFO L225 Difference]: With dead ends: 1742 [2024-09-20 12:20:54,346 INFO L226 Difference]: Without dead ends: 1740 [2024-09-20 12:20:54,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1341, Invalid=5465, Unknown=0, NotChecked=0, Total=6806 [2024-09-20 12:20:54,349 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 183 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:20:54,349 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 812 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-09-20 12:20:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2024-09-20 12:20:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1596. [2024-09-20 12:20:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 809 states have (on average 1.2941903584672436) internal successors, (1047), 814 states have internal predecessors, (1047), 733 states have call successors, (733), 54 states have call predecessors, (733), 53 states have return successors, (731), 727 states have call predecessors, (731), 731 states have call successors, (731) [2024-09-20 12:20:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2511 transitions. [2024-09-20 12:20:56,673 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2511 transitions. Word has length 109 [2024-09-20 12:20:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:20:56,673 INFO L474 AbstractCegarLoop]: Abstraction has 1596 states and 2511 transitions. [2024-09-20 12:20:56,674 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-20 12:20:56,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:20:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2511 transitions. [2024-09-20 12:20:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 12:20:56,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:20:56,677 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:20:56,695 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 12:20:56,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 12:20:56,878 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:20:56,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:20:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2081223370, now seen corresponding path program 5 times [2024-09-20 12:20:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:20:56,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161471642] [2024-09-20 12:20:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:20:56,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:20:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:20:56,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812116082] [2024-09-20 12:20:56,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:20:56,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:20:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:20:56,899 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 12:20:56,901 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 12:20:57,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 12:20:57,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:20:57,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-20 12:20:57,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:20:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-20 12:20:58,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:21:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-09-20 12:21:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:21:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161471642] [2024-09-20 12:21:01,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:21:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812116082] [2024-09-20 12:21:01,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812116082] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:21:01,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:21:01,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-09-20 12:21:01,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759135088] [2024-09-20 12:21:01,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:21:01,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 12:21:01,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:21:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 12:21:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 12:21:01,449 INFO L87 Difference]: Start difference. First operand 1596 states and 2511 transitions. Second operand has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:21:20,704 WARN L293 SmtUtils]: Spent 9.70s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:21:35,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:21:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:21:41,672 INFO L93 Difference]: Finished difference Result 1788 states and 2773 transitions. [2024-09-20 12:21:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-20 12:21:41,673 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 109 [2024-09-20 12:21:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:21:41,682 INFO L225 Difference]: With dead ends: 1788 [2024-09-20 12:21:41,682 INFO L226 Difference]: Without dead ends: 1784 [2024-09-20 12:21:41,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=1369, Invalid=5771, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 12:21:41,685 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 287 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 338 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:21:41,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 962 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1425 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2024-09-20 12:21:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2024-09-20 12:21:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1695. [2024-09-20 12:21:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 853 states have (on average 1.2919109026963658) internal successors, (1102), 858 states have internal predecessors, (1102), 781 states have call successors, (781), 61 states have call predecessors, (781), 60 states have return successors, (779), 775 states have call predecessors, (779), 779 states have call successors, (779) [2024-09-20 12:21:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2662 transitions. [2024-09-20 12:21:44,700 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2662 transitions. Word has length 109 [2024-09-20 12:21:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:21:44,701 INFO L474 AbstractCegarLoop]: Abstraction has 1695 states and 2662 transitions. [2024-09-20 12:21:44,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:21:44,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:21:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2662 transitions. [2024-09-20 12:21:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-20 12:21:44,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:21:44,704 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:21:44,713 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 12:21:44,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 12:21:44,909 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:21:44,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:21:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1733684403, now seen corresponding path program 6 times [2024-09-20 12:21:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:21:44,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64693363] [2024-09-20 12:21:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:21:44,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:21:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:21:44,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906566921] [2024-09-20 12:21:44,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:21:44,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:21:44,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:21:44,941 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 12:21:44,945 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 12:21:45,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 12:21:45,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:21:45,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-20 12:21:45,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:21:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 95 proven. 67 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2024-09-20 12:21:46,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:21:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:21:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64693363] [2024-09-20 12:21:48,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:21:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906566921] [2024-09-20 12:21:48,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906566921] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:21:48,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:21:48,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 12:21:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701356347] [2024-09-20 12:21:48,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:21:48,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 12:21:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:21:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 12:21:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:21:48,192 INFO L87 Difference]: Start difference. First operand 1695 states and 2662 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-20 12:21:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:21:53,208 INFO L93 Difference]: Finished difference Result 2006 states and 3144 transitions. [2024-09-20 12:21:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:21:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 126 [2024-09-20 12:21:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:21:53,221 INFO L225 Difference]: With dead ends: 2006 [2024-09-20 12:21:53,221 INFO L226 Difference]: Without dead ends: 2003 [2024-09-20 12:21:53,222 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 12:21:53,223 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 64 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:21:53,223 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 666 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:21:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2024-09-20 12:21:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1874. [2024-09-20 12:21:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 943 states have (on average 1.2916224814422057) internal successors, (1218), 948 states have internal predecessors, (1218), 861 states have call successors, (861), 70 states have call predecessors, (861), 69 states have return successors, (859), 855 states have call predecessors, (859), 859 states have call successors, (859) [2024-09-20 12:21:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2938 transitions. [2024-09-20 12:21:56,857 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2938 transitions. Word has length 126 [2024-09-20 12:21:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:21:56,857 INFO L474 AbstractCegarLoop]: Abstraction has 1874 states and 2938 transitions. [2024-09-20 12:21:56,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-20 12:21:56,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:21:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2938 transitions. [2024-09-20 12:21:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-20 12:21:56,861 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:21:56,861 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:21:56,869 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 12:21:57,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 12:21:57,066 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:21:57,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:21:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1887231395, now seen corresponding path program 3 times [2024-09-20 12:21:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:21:57,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027580635] [2024-09-20 12:21:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:21:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:21:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:21:57,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465823415] [2024-09-20 12:21:57,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:21:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:21:57,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:21:57,089 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 12:21:57,091 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 12:21:57,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:21:57,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:21:57,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 12:21:57,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:21:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2024-09-20 12:21:58,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:22:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:22:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027580635] [2024-09-20 12:22:01,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:22:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465823415] [2024-09-20 12:22:01,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465823415] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:22:01,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:22:01,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 12:22:01,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987252393] [2024-09-20 12:22:01,633 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:22:01,633 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 12:22:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:22:01,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 12:22:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:22:01,634 INFO L87 Difference]: Start difference. First operand 1874 states and 2938 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 12:22:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:22:05,849 INFO L93 Difference]: Finished difference Result 2059 states and 3224 transitions. [2024-09-20 12:22:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:22:05,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2024-09-20 12:22:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:22:05,860 INFO L225 Difference]: With dead ends: 2059 [2024-09-20 12:22:05,861 INFO L226 Difference]: Without dead ends: 2057 [2024-09-20 12:22:05,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:22:05,862 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:22:05,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 382 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:22:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2024-09-20 12:22:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2012. [2024-09-20 12:22:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 1013 states have (on average 1.293188548864758) internal successors, (1310), 1018 states have internal predecessors, (1310), 925 states have call successors, (925), 74 states have call predecessors, (925), 73 states have return successors, (923), 919 states have call predecessors, (923), 923 states have call successors, (923) [2024-09-20 12:22:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 3158 transitions. [2024-09-20 12:22:09,540 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 3158 transitions. Word has length 129 [2024-09-20 12:22:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:22:09,541 INFO L474 AbstractCegarLoop]: Abstraction has 2012 states and 3158 transitions. [2024-09-20 12:22:09,541 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 12:22:09,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:22:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 3158 transitions. [2024-09-20 12:22:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-20 12:22:09,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:22:09,544 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:22:09,561 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 12:22:09,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 12:22:09,745 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:22:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:22:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1329164778, now seen corresponding path program 7 times [2024-09-20 12:22:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:22:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154571065] [2024-09-20 12:22:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:22:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:22:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:22:09,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702369360] [2024-09-20 12:22:09,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:22:09,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:22:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:22:09,769 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:22:09,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 12:22:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:22:09,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-20 12:22:09,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:22:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 70 proven. 76 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-09-20 12:22:11,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:22:12,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:22:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154571065] [2024-09-20 12:22:12,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:22:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702369360] [2024-09-20 12:22:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702369360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:22:12,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:22:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 12:22:12,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755928152] [2024-09-20 12:22:12,186 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:22:12,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 12:22:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:22:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 12:22:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:22:12,187 INFO L87 Difference]: Start difference. First operand 2012 states and 3158 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-20 12:22:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:22:17,138 INFO L93 Difference]: Finished difference Result 2146 states and 3364 transitions. [2024-09-20 12:22:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 12:22:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 129 [2024-09-20 12:22:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:22:17,150 INFO L225 Difference]: With dead ends: 2146 [2024-09-20 12:22:17,150 INFO L226 Difference]: Without dead ends: 2139 [2024-09-20 12:22:17,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 12:22:17,151 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:22:17,152 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 663 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:22:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2024-09-20 12:22:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2124. [2024-09-20 12:22:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 1067 states have (on average 1.295220243673852) internal successors, (1382), 1072 states have internal predecessors, (1382), 981 states have call successors, (981), 76 states have call predecessors, (981), 75 states have return successors, (979), 975 states have call predecessors, (979), 979 states have call successors, (979) [2024-09-20 12:22:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3342 transitions. [2024-09-20 12:22:21,028 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3342 transitions. Word has length 129 [2024-09-20 12:22:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:22:21,028 INFO L474 AbstractCegarLoop]: Abstraction has 2124 states and 3342 transitions. [2024-09-20 12:22:21,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-20 12:22:21,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:22:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3342 transitions. [2024-09-20 12:22:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-20 12:22:21,032 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:22:21,032 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:22:21,050 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-20 12:22:21,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:22:21,232 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:22:21,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:22:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 979073460, now seen corresponding path program 4 times [2024-09-20 12:22:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:22:21,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509132630] [2024-09-20 12:22:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:22:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:22:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:22:21,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086926421] [2024-09-20 12:22:21,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:22:21,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:22:21,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:22:21,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:22:21,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 12:22:21,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:22:21,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:22:21,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-20 12:22:21,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:22:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2024-09-20 12:22:22,541 INFO L327 TraceCheckSpWp]: Computing backward predicates...