./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gj2007.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/gj2007.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e210f4af0021f1e0c887bbfa24b18aad98424108efaad4cfc57802fd9fd5ce53 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:25:06,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:25:06,188 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:25:06,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:25:06,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:25:06,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:25:06,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:25:06,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:25:06,233 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:25:06,237 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:25:06,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:25:06,237 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:25:06,238 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:25:06,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:25:06,238 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:25:06,239 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:25:06,239 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:25:06,239 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:25:06,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:25:06,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:25:06,241 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:25:06,242 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:25:06,242 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:25:06,242 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:25:06,242 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:25:06,242 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:25:06,243 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:25:06,243 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:25:06,243 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:25:06,243 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:25:06,243 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:25:06,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:25:06,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:25:06,244 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:25:06,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:25:06,244 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:25:06,245 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:25:06,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:25:06,245 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:25:06,247 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:25:06,247 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:25:06,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:25:06,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e210f4af0021f1e0c887bbfa24b18aad98424108efaad4cfc57802fd9fd5ce53 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:25:06,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:25:06,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:25:06,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:25:06,589 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:25:06,590 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:25:06,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-lit/gj2007.i [2024-09-21 11:25:07,997 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:25:08,206 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:25:08,207 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/gj2007.i [2024-09-21 11:25:08,213 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0cccb5b1e/4f52febc68e24be9a3d5eb70707779a6/FLAGafc48a0df [2024-09-21 11:25:08,594 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0cccb5b1e/4f52febc68e24be9a3d5eb70707779a6 [2024-09-21 11:25:08,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:25:08,598 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:25:08,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:25:08,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:25:08,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:25:08,607 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6419abd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08, skipping insertion in model container [2024-09-21 11:25:08,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,625 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:25:08,754 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/gj2007.i[895,908] [2024-09-21 11:25:08,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:25:08,775 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:25:08,786 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/gj2007.i[895,908] [2024-09-21 11:25:08,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:25:08,804 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:25:08,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08 WrapperNode [2024-09-21 11:25:08,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:25:08,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:25:08,806 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:25:08,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:25:08,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,825 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:25:08,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:25:08,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:25:08,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:25:08,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:25:08,837 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,839 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,851 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]. [2024-09-21 11:25:08,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,851 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:25:08,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:25:08,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:25:08,861 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:25:08,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (1/1) ... [2024-09-21 11:25:08,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:25:08,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:08,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:25:08,900 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:25:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:25:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:25:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:25:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:25:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:25:08,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:25:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:25:08,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:25:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:25:08,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:25:08,990 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:25:08,992 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:25:09,089 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-21 11:25:09,090 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:25:09,123 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:25:09,123 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 11:25:09,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:25:09 BoogieIcfgContainer [2024-09-21 11:25:09,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:25:09,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:25:09,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:25:09,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:25:09,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:25:08" (1/3) ... [2024-09-21 11:25:09,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4c9881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:25:09, skipping insertion in model container [2024-09-21 11:25:09,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:25:08" (2/3) ... [2024-09-21 11:25:09,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4c9881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:25:09, skipping insertion in model container [2024-09-21 11:25:09,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:25:09" (3/3) ... [2024-09-21 11:25:09,141 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.i [2024-09-21 11:25:09,172 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:25:09,172 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:25:09,219 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:25:09,225 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;@1d0689e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:25:09,226 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:25:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 11:25:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 11:25:09,235 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:09,235 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:09,236 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:09,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1957128844, now seen corresponding path program 1 times [2024-09-21 11:25:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:09,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887809113] [2024-09-21 11:25:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:09,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:09,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887809113] [2024-09-21 11:25:09,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887809113] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:25:09,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:25:09,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:25:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291704220] [2024-09-21 11:25:09,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:25:09,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:25:09,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:25:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:25:09,401 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:09,419 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-09-21 11:25:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:25:09,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-21 11:25:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:09,427 INFO L225 Difference]: With dead ends: 29 [2024-09-21 11:25:09,427 INFO L226 Difference]: Without dead ends: 12 [2024-09-21 11:25:09,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:25:09,432 INFO L434 NwaCegarLoop]: 17 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, 17 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 [2024-09-21 11:25:09,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:25:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-21 11:25:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-21 11:25:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-09-21 11:25:09,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2024-09-21 11:25:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:09,457 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-09-21 11:25:09,457 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-09-21 11:25:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-21 11:25:09,458 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:09,459 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:09,459 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:25:09,459 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:09,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1947893634, now seen corresponding path program 1 times [2024-09-21 11:25:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:09,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826453759] [2024-09-21 11:25:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:09,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:09,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826453759] [2024-09-21 11:25:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826453759] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:25:09,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:25:09,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 11:25:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890125091] [2024-09-21 11:25:09,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:25:09,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 11:25:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 11:25:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:25:09,530 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:09,546 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2024-09-21 11:25:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 11:25:09,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-21 11:25:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:09,548 INFO L225 Difference]: With dead ends: 21 [2024-09-21 11:25:09,548 INFO L226 Difference]: Without dead ends: 14 [2024-09-21 11:25:09,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 11:25:09,549 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:09,550 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:25:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-21 11:25:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-21 11:25:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-21 11:25:09,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-09-21 11:25:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:09,562 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-21 11:25:09,563 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-21 11:25:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-21 11:25:09,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:09,564 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:09,565 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:25:09,565 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:09,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash 365820639, now seen corresponding path program 1 times [2024-09-21 11:25:09,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:09,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270722427] [2024-09-21 11:25:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:09,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:09,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:09,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270722427] [2024-09-21 11:25:09,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270722427] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:09,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184239465] [2024-09-21 11:25:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:09,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:09,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:09,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:25:09,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:25:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:09,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-21 11:25:09,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:09,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184239465] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:09,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:09,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-21 11:25:09,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884111986] [2024-09-21 11:25:09,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:09,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 11:25:09,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 11:25:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:25:09,841 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:09,879 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2024-09-21 11:25:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:25:09,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-21 11:25:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:09,880 INFO L225 Difference]: With dead ends: 26 [2024-09-21 11:25:09,880 INFO L226 Difference]: Without dead ends: 19 [2024-09-21 11:25:09,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:25:09,882 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:09,882 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:25:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-09-21 11:25:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-09-21 11:25:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-21 11:25:09,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2024-09-21 11:25:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:09,887 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-21 11:25:09,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:09,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-21 11:25:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-21 11:25:09,888 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:09,888 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:09,905 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:25:10,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:10,093 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:10,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1810326642, now seen corresponding path program 1 times [2024-09-21 11:25:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:10,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427114344] [2024-09-21 11:25:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:10,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:25:10,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:10,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427114344] [2024-09-21 11:25:10,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427114344] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:10,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671777762] [2024-09-21 11:25:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:10,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:10,222 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:25:10,223 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:25:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:10,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-21 11:25:10,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:25:10,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:25:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671777762] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:10,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-21 11:25:10,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334516610] [2024-09-21 11:25:10,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:10,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 11:25:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 11:25:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:25:10,361 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:10,400 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-09-21 11:25:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 11:25:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-21 11:25:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:10,401 INFO L225 Difference]: With dead ends: 37 [2024-09-21 11:25:10,401 INFO L226 Difference]: Without dead ends: 27 [2024-09-21 11:25:10,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:25:10,403 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:10,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:25:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-21 11:25:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-21 11:25:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-21 11:25:10,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2024-09-21 11:25:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:10,417 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-21 11:25:10,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:10,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-21 11:25:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-21 11:25:10,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:10,420 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:10,437 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 11:25:10,623 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 [2024-09-21 11:25:10,624 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:10,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1138297446, now seen corresponding path program 2 times [2024-09-21 11:25:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218179825] [2024-09-21 11:25:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:10,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:25:10,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218179825] [2024-09-21 11:25:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218179825] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:10,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659468549] [2024-09-21 11:25:10,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:25:10,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:10,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:25:10,804 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:25:10,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:25:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:25:10,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 11:25:10,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:25:10,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:25:11,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659468549] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:11,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:11,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-21 11:25:11,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650789979] [2024-09-21 11:25:11,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:11,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 11:25:11,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 11:25:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:25:11,025 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:11,084 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-09-21 11:25:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 11:25:11,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-21 11:25:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:11,085 INFO L225 Difference]: With dead ends: 53 [2024-09-21 11:25:11,085 INFO L226 Difference]: Without dead ends: 43 [2024-09-21 11:25:11,086 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:25:11,087 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:11,087 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:25:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-21 11:25:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-21 11:25:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-09-21 11:25:11,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 26 [2024-09-21 11:25:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:11,097 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-09-21 11:25:11,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:11,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-09-21 11:25:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-21 11:25:11,099 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:11,099 INFO L216 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:11,115 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 11:25:11,299 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 [2024-09-21 11:25:11,300 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:11,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:11,301 INFO L85 PathProgramCache]: Analyzing trace with hash 998160974, now seen corresponding path program 3 times [2024-09-21 11:25:11,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:11,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000001854] [2024-09-21 11:25:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:11,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:11,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:25:11,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000001854] [2024-09-21 11:25:11,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000001854] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:11,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802544047] [2024-09-21 11:25:11,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:25:11,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:11,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:11,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:25:11,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:25:11,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-21 11:25:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:25:11,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-21 11:25:11,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-09-21 11:25:11,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-09-21 11:25:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802544047] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:11,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2024-09-21 11:25:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340800213] [2024-09-21 11:25:11,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:11,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:25:11,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:25:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:25:11,832 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:11,912 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-21 11:25:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 11:25:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-21 11:25:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:11,916 INFO L225 Difference]: With dead ends: 63 [2024-09-21 11:25:11,917 INFO L226 Difference]: Without dead ends: 53 [2024-09-21 11:25:11,918 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:25:11,918 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:11,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:25:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-21 11:25:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-21 11:25:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-09-21 11:25:11,936 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 42 [2024-09-21 11:25:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:11,936 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-09-21 11:25:11,936 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:11,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-09-21 11:25:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 11:25:11,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:11,939 INFO L216 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:11,953 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 11:25:12,140 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 [2024-09-21 11:25:12,140 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:12,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash -327394665, now seen corresponding path program 4 times [2024-09-21 11:25:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:12,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094715212] [2024-09-21 11:25:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:12,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:12,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:25:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094715212] [2024-09-21 11:25:12,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094715212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681066430] [2024-09-21 11:25:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:25:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:12,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:25:12,508 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:25:12,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:25:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:25:12,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-21 11:25:12,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:25:12,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:25:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681066430] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:13,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:13,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-09-21 11:25:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334724113] [2024-09-21 11:25:13,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:13,039 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-21 11:25:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:13,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-21 11:25:13,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 11:25:13,041 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:13,158 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2024-09-21 11:25:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-21 11:25:13,158 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2024-09-21 11:25:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:13,159 INFO L225 Difference]: With dead ends: 105 [2024-09-21 11:25:13,159 INFO L226 Difference]: Without dead ends: 87 [2024-09-21 11:25:13,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 11:25:13,161 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:13,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:25:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-21 11:25:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-21 11:25:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2024-09-21 11:25:13,176 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 52 [2024-09-21 11:25:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:13,176 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2024-09-21 11:25:13,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:13,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2024-09-21 11:25:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-21 11:25:13,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:13,182 INFO L216 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:13,198 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 11:25:13,385 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 [2024-09-21 11:25:13,386 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:13,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash 502729092, now seen corresponding path program 5 times [2024-09-21 11:25:13,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:13,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212372663] [2024-09-21 11:25:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:14,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:25:14,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212372663] [2024-09-21 11:25:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212372663] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651352665] [2024-09-21 11:25:14,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:25:14,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:14,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:14,248 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:25:14,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:25:14,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2024-09-21 11:25:14,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:25:14,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-21 11:25:14,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:25:14,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:25:15,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651352665] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:15,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2024-09-21 11:25:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811205142] [2024-09-21 11:25:15,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:15,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-21 11:25:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-21 11:25:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-09-21 11:25:15,456 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:15,593 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2024-09-21 11:25:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-21 11:25:15,593 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2024-09-21 11:25:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:15,595 INFO L225 Difference]: With dead ends: 141 [2024-09-21 11:25:15,595 INFO L226 Difference]: Without dead ends: 123 [2024-09-21 11:25:15,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 141 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-09-21 11:25:15,597 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:15,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:25:15,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-21 11:25:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-09-21 11:25:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 118 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2024-09-21 11:25:15,610 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 86 [2024-09-21 11:25:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:15,611 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2024-09-21 11:25:15,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:15,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2024-09-21 11:25:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-09-21 11:25:15,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:15,613 INFO L216 NwaCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:15,629 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 11:25:15,817 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 [2024-09-21 11:25:15,818 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:15,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -175082034, now seen corresponding path program 6 times [2024-09-21 11:25:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486085548] [2024-09-21 11:25:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:15,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:17,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:17,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:17,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486085548] [2024-09-21 11:25:17,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486085548] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:17,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704942196] [2024-09-21 11:25:17,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:25:17,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:17,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:17,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:25:17,905 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:25:17,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-09-21 11:25:17,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:25:17,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:25:17,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2024-09-21 11:25:18,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2024-09-21 11:25:18,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704942196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:18,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:18,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 9, 9] total 66 [2024-09-21 11:25:18,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336595497] [2024-09-21 11:25:18,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:18,354 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-21 11:25:18,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-21 11:25:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2024-09-21 11:25:18,357 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 66 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:18,575 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2024-09-21 11:25:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-21 11:25:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 66 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2024-09-21 11:25:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:18,577 INFO L225 Difference]: With dead ends: 144 [2024-09-21 11:25:18,577 INFO L226 Difference]: Without dead ends: 139 [2024-09-21 11:25:18,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2024-09-21 11:25:18,580 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:18,582 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:25:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-21 11:25:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-21 11:25:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.1119402985074627) internal successors, (149), 134 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2024-09-21 11:25:18,603 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 122 [2024-09-21 11:25:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:18,604 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2024-09-21 11:25:18,604 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 66 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:18,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2024-09-21 11:25:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-21 11:25:18,606 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:18,606 INFO L216 NwaCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:18,622 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 11:25:18,806 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:18,807 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:18,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1078842790, now seen corresponding path program 7 times [2024-09-21 11:25:18,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:18,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966480936] [2024-09-21 11:25:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:18,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:21,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:21,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:21,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966480936] [2024-09-21 11:25:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966480936] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828752102] [2024-09-21 11:25:21,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 11:25:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:21,093 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) [2024-09-21 11:25:21,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:25:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:21,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-21 11:25:21,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:21,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:25:24,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828752102] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:24,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:24,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 103 [2024-09-21 11:25:24,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731324790] [2024-09-21 11:25:24,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:24,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-09-21 11:25:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-09-21 11:25:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2024-09-21 11:25:24,331 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 103 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:24,894 INFO L93 Difference]: Finished difference Result 216 states and 301 transitions. [2024-09-21 11:25:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-09-21 11:25:24,895 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2024-09-21 11:25:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:24,896 INFO L225 Difference]: With dead ends: 216 [2024-09-21 11:25:24,896 INFO L226 Difference]: Without dead ends: 211 [2024-09-21 11:25:24,898 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 213 SyntacticMatches, 30 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2024-09-21 11:25:24,899 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:24,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 11:25:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-21 11:25:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-09-21 11:25:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 206 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2024-09-21 11:25:24,916 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 138 [2024-09-21 11:25:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:24,916 INFO L474 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2024-09-21 11:25:24,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:24,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2024-09-21 11:25:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-09-21 11:25:24,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:24,920 INFO L216 NwaCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:24,936 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-21 11:25:25,120 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:25,121 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:25,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1537228046, now seen corresponding path program 8 times [2024-09-21 11:25:25,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:25,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479469239] [2024-09-21 11:25:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:25,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:27,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2024-09-21 11:25:27,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:27,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479469239] [2024-09-21 11:25:27,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479469239] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:25:27,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507904281] [2024-09-21 11:25:27,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:25:27,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:25:27,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:25:27,054 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) [2024-09-21 11:25:27,057 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 11:25:27,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:25:27,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:25:27,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-21 11:25:27,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:25:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2024-09-21 11:25:27,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:25:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2024-09-21 11:25:27,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507904281] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:25:27,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:25:27,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 57 [2024-09-21 11:25:27,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167948858] [2024-09-21 11:25:27,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:25:27,793 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-21 11:25:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-21 11:25:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2024-09-21 11:25:27,795 INFO L87 Difference]: Start difference. First operand 211 states and 261 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:29,118 INFO L93 Difference]: Finished difference Result 2867 states and 4242 transitions. [2024-09-21 11:25:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-21 11:25:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2024-09-21 11:25:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:29,131 INFO L225 Difference]: With dead ends: 2867 [2024-09-21 11:25:29,131 INFO L226 Difference]: Without dead ends: 2862 [2024-09-21 11:25:29,134 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 419 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=3187, Unknown=0, NotChecked=0, Total=3306 [2024-09-21 11:25:29,135 INFO L434 NwaCegarLoop]: 110 mSDtfsCounter, 53 mSDsluCounter, 5675 mSDsCounter, 0 mSdLazyCounter, 2864 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 5785 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:29,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 5785 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2864 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-21 11:25:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2024-09-21 11:25:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 213. [2024-09-21 11:25:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.25) internal successors, (260), 208 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 264 transitions. [2024-09-21 11:25:29,232 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 264 transitions. Word has length 210 [2024-09-21 11:25:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:29,233 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 264 transitions. [2024-09-21 11:25:29,233 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:29,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 264 transitions. [2024-09-21 11:25:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-09-21 11:25:29,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:25:29,237 INFO L216 NwaCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:25:29,253 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 11:25:29,440 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-21 11:25:29,441 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:25:29,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:29,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1295635341, now seen corresponding path program 9 times [2024-09-21 11:25:29,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:25:29,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176694467] [2024-09-21 11:25:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:25:29,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:25:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:31,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:25:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:25:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2024-09-21 11:25:31,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:25:31,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176694467] [2024-09-21 11:25:31,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176694467] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:25:31,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:25:31,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2024-09-21 11:25:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666553072] [2024-09-21 11:25:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:25:31,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-21 11:25:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:25:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-21 11:25:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2024-09-21 11:25:31,047 INFO L87 Difference]: Start difference. First operand 213 states and 264 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:25:31,375 INFO L93 Difference]: Finished difference Result 312 states and 412 transitions. [2024-09-21 11:25:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-21 11:25:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2024-09-21 11:25:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:25:31,377 INFO L225 Difference]: With dead ends: 312 [2024-09-21 11:25:31,377 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 11:25:31,379 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2024-09-21 11:25:31,379 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:25:31,380 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:25:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 11:25:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 11:25:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-21 11:25:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 11:25:31,381 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 212 [2024-09-21 11:25:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:25:31,381 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 11:25:31,381 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 11:25:31,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:25:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 11:25:31,382 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 11:25:31,384 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 11:25:31,385 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-21 11:25:31,388 INFO L408 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2024-09-21 11:25:31,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 11:25:35,989 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 11:25:36,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:25:36 BoogieIcfgContainer [2024-09-21 11:25:36,020 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 11:25:36,020 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 11:25:36,020 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 11:25:36,021 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 11:25:36,021 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:25:09" (3/4) ... [2024-09-21 11:25:36,023 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 11:25:36,077 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 11:25:36,077 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 11:25:36,078 INFO L158 Benchmark]: Toolchain (without parser) took 27480.22ms. Allocated memory was 174.1MB in the beginning and 524.3MB in the end (delta: 350.2MB). Free memory was 142.7MB in the beginning and 445.6MB in the end (delta: -302.8MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. [2024-09-21 11:25:36,078 INFO L158 Benchmark]: CDTParser took 0.58ms. Allocated memory is still 174.1MB. Free memory was 137.5MB in the beginning and 137.3MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:25:36,078 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.56ms. Allocated memory is still 174.1MB. Free memory was 142.7MB in the beginning and 130.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-21 11:25:36,078 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.97ms. Allocated memory is still 174.1MB. Free memory was 130.5MB in the beginning and 130.0MB in the end (delta: 505.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 11:25:36,079 INFO L158 Benchmark]: Boogie Preprocessor took 33.78ms. Allocated memory is still 174.1MB. Free memory was 130.0MB in the beginning and 128.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 11:25:36,079 INFO L158 Benchmark]: RCFGBuilder took 263.20ms. Allocated memory is still 174.1MB. Free memory was 128.4MB in the beginning and 143.1MB in the end (delta: -14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-21 11:25:36,079 INFO L158 Benchmark]: TraceAbstraction took 26894.35ms. Allocated memory was 174.1MB in the beginning and 524.3MB in the end (delta: 350.2MB). Free memory was 143.1MB in the beginning and 448.7MB in the end (delta: -305.6MB). Peak memory consumption was 263.7MB. Max. memory is 16.1GB. [2024-09-21 11:25:36,079 INFO L158 Benchmark]: Witness Printer took 56.97ms. Allocated memory is still 524.3MB. Free memory was 448.7MB in the beginning and 445.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 11:25:36,081 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58ms. Allocated memory is still 174.1MB. Free memory was 137.5MB in the beginning and 137.3MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 206.56ms. Allocated memory is still 174.1MB. Free memory was 142.7MB in the beginning and 130.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.97ms. Allocated memory is still 174.1MB. Free memory was 130.5MB in the beginning and 130.0MB in the end (delta: 505.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.78ms. Allocated memory is still 174.1MB. Free memory was 130.0MB in the beginning and 128.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 263.20ms. Allocated memory is still 174.1MB. Free memory was 128.4MB in the beginning and 143.1MB in the end (delta: -14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 26894.35ms. Allocated memory was 174.1MB in the beginning and 524.3MB in the end (delta: 350.2MB). Free memory was 143.1MB in the beginning and 448.7MB in the end (delta: -305.6MB). Peak memory consumption was 263.7MB. Max. memory is 16.1GB. * Witness Printer took 56.97ms. Allocated memory is still 524.3MB. Free memory was 448.7MB in the beginning and 445.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.2s, OverallIterations: 12, TraceHistogramMax: 101, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61 mSDsluCounter, 6122 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5902 mSDsCounter, 289 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4129 IncrementalHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 289 mSolverCounterUnsat, 220 mSDtfsCounter, 4129 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1754 GetRequests, 1302 SyntacticMatches, 48 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 10.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=11, InterpolantAutomatonStates: 419, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 2649 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 1644 NumberOfCodeBlocks, 1562 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 2320 ConstructedInterpolants, 0 QuantifiedInterpolants, 5604 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1586 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 26464/68563 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((x == 80) && (y == 80)) || ((x == 83) && (y == 83))) || ((67 == x) && (67 == y))) || ((x == 75) && (y == 75))) || ((x == 65) && (y == 65))) || ((66 == y) && (66 == x))) || ((94 == x) && (94 == y))) || ((81 == y) && (81 == x))) || ((57 == y) && (57 == x))) || ((51 == x) && (51 == y))) || ((y == 79) && (x == 79))) || ((y == 54) && (x == 54))) || ((98 == y) && (98 == x))) || ((x == 96) && (y == 96))) || ((92 == y) && (92 == x))) || ((y == 82) && (x == 82))) || ((77 == x) && (77 == y))) || ((88 == y) && (88 == x))) || ((x == 63) && (y == 63))) || ((59 == y) && (59 == x))) || ((x == 60) && (y == 60))) || ((y == 55) && (x == 55))) || ((y == 71) && (x == 71))) || ((x == 58) && (y == 58))) || ((y == 50) && (x <= 50))) || ((y == 62) && (x == 62))) || ((64 == y) && (64 == x))) || ((76 == y) && (76 == x))) || ((y == 93) && (x == 93))) || ((x == 69) && (y == 69))) || ((97 == x) && (97 == y))) || ((x == 61) && (y == 61))) || ((87 == y) && (87 == x))) || ((53 == y) && (53 == x))) || ((x == 70) && (y == 70))) || ((72 == y) && (72 == x))) || ((91 == y) && (91 == x))) || ((x == 74) && (y == 74))) || ((x == 52) && (y == 52))) || ((y == 99) && (x == 99))) || ((x == 73) && (y == 73))) || ((56 == y) && (56 == x))) || ((x == 78) && (y == 78))) || ((100 <= x) && (y == 100))) || ((84 == y) && (84 == x))) || ((68 == y) && (68 == x))) || ((95 == x) && (95 == y))) || ((y == 86) && (x == 86))) || ((x == 90) && (y == 90))) || ((y == 85) && (x == 85))) || ((x == 89) && (y == 89))) - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-09-21 11:25:36,110 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE