./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/heapsort.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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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-invgen/heapsort.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 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --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-6908dde-m [2024-09-24 23:03:31,849 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:03:31,921 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:03:31,925 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:03:31,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:03:31,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:03:31,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:03:31,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:03:31,952 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:03:31,952 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:03:31,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:03:31,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:03:31,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:03:31,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:03:31,954 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:03:31,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:03:31,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:03:31,955 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:03:31,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:03:31,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:03:31,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:03:31,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:03:31,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:03:31,958 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:03:31,958 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:03:31,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:03:31,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:03:31,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:03:31,959 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:03:31,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:03:31,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:03:31,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:03:31,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:03:31,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:03:31,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:03:31,961 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:03:31,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:03:31,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:03:31,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:03:31,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:03:31,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:03:31,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:03:31,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:03:32,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:03:32,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:03:32,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:03:32,238 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:03:32,238 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:03:32,239 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-24 23:03:33,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:03:33,860 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:03:33,861 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-24 23:03:33,867 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/de921b582/baffc5f05e6f439a9b9365953270ea07/FLAGb57d37563 [2024-09-24 23:03:33,884 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/de921b582/baffc5f05e6f439a9b9365953270ea07 [2024-09-24 23:03:33,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:03:33,888 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:03:33,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:03:33,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:03:33,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:03:33,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:03:33" (1/1) ... [2024-09-24 23:03:33,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b95195c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:33, skipping insertion in model container [2024-09-24 23:03:33,895 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:03:33" (1/1) ... [2024-09-24 23:03:33,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:03:34,074 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-invgen/heapsort.i[893,906] [2024-09-24 23:03:34,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:03:34,099 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:03:34,109 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-invgen/heapsort.i[893,906] [2024-09-24 23:03:34,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:03:34,132 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:03:34,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34 WrapperNode [2024-09-24 23:03:34,133 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:03:34,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:03:34,135 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:03:34,135 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:03:34,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,163 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:03:34,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:03:34,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:03:34,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:03:34,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:03:34,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,179 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,202 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]. [2024-09-24 23:03:34,203 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,214 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:03:34,220 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:03:34,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:03:34,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:03:34,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (1/1) ... [2024-09-24 23:03:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:03:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:34,270 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) [2024-09-24 23:03:34,273 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 [2024-09-24 23:03:34,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:03:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:03:34,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:03:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:03:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:03:34,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:03:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:03:34,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:03:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:03:34,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:03:34,383 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:03:34,386 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:03:34,561 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-24 23:03:34,561 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:03:34,588 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:03:34,588 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:03:34,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:03:34 BoogieIcfgContainer [2024-09-24 23:03:34,588 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:03:34,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:03:34,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:03:34,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:03:34,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:03:33" (1/3) ... [2024-09-24 23:03:34,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4603ac1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:03:34, skipping insertion in model container [2024-09-24 23:03:34,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:03:34" (2/3) ... [2024-09-24 23:03:34,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4603ac1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:03:34, skipping insertion in model container [2024-09-24 23:03:34,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:03:34" (3/3) ... [2024-09-24 23:03:34,601 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort.i [2024-09-24 23:03:34,618 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:03:34,618 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:03:34,668 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:03:34,674 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;@389ffede, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:03:34,675 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:03:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:03:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-24 23:03:34,685 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:34,686 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:34,686 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:34,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash 855475308, now seen corresponding path program 1 times [2024-09-24 23:03:34,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:34,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497839028] [2024-09-24 23:03:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:35,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:03:35,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:35,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497839028] [2024-09-24 23:03:35,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497839028] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:35,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:35,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-24 23:03:35,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653915512] [2024-09-24 23:03:35,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:35,042 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:03:35,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:35,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:03:35,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:03:35,070 INFO L87 Difference]: Start difference. First operand has 43 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:03:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:35,396 INFO L93 Difference]: Finished difference Result 113 states and 211 transitions. [2024-09-24 23:03:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-24 23:03:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:35,404 INFO L225 Difference]: With dead ends: 113 [2024-09-24 23:03:35,404 INFO L226 Difference]: Without dead ends: 69 [2024-09-24 23:03:35,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:03:35,410 INFO L434 NwaCegarLoop]: 73 mSDtfsCounter, 34 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:35,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 293 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:03:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-24 23:03:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-09-24 23:03:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-24 23:03:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 91 transitions. [2024-09-24 23:03:35,464 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 91 transitions. Word has length 14 [2024-09-24 23:03:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:35,464 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 91 transitions. [2024-09-24 23:03:35,465 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:03:35,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:35,466 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 91 transitions. [2024-09-24 23:03:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-24 23:03:35,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:35,469 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:35,469 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:03:35,470 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:35,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:35,470 INFO L85 PathProgramCache]: Analyzing trace with hash 843231207, now seen corresponding path program 1 times [2024-09-24 23:03:35,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:35,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135511535] [2024-09-24 23:03:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:35,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:35,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:03:35,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:35,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135511535] [2024-09-24 23:03:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135511535] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:35,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:35,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-24 23:03:35,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798748619] [2024-09-24 23:03:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:35,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:03:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:03:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:03:35,640 INFO L87 Difference]: Start difference. First operand 59 states and 91 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:03:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:35,835 INFO L93 Difference]: Finished difference Result 117 states and 183 transitions. [2024-09-24 23:03:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:35,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-24 23:03:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:35,839 INFO L225 Difference]: With dead ends: 117 [2024-09-24 23:03:35,839 INFO L226 Difference]: Without dead ends: 115 [2024-09-24 23:03:35,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:03:35,842 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:35,843 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-24 23:03:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-09-24 23:03:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 48 states have call successors, (48), 6 states have call predecessors, (48), 5 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-24 23:03:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 167 transitions. [2024-09-24 23:03:35,881 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 167 transitions. Word has length 14 [2024-09-24 23:03:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:35,881 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 167 transitions. [2024-09-24 23:03:35,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:03:35,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:35,882 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 167 transitions. [2024-09-24 23:03:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:03:35,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:35,883 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:35,884 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:03:35,884 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:35,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash 842919880, now seen corresponding path program 1 times [2024-09-24 23:03:35,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:35,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673116009] [2024-09-24 23:03:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:03:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673116009] [2024-09-24 23:03:36,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673116009] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:36,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:36,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-24 23:03:36,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623154821] [2024-09-24 23:03:36,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:36,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:03:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:36,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:03:36,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:03:36,024 INFO L87 Difference]: Start difference. First operand 106 states and 167 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:03:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:36,192 INFO L93 Difference]: Finished difference Result 161 states and 257 transitions. [2024-09-24 23:03:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:03:36,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-24 23:03:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:36,195 INFO L225 Difference]: With dead ends: 161 [2024-09-24 23:03:36,195 INFO L226 Difference]: Without dead ends: 159 [2024-09-24 23:03:36,196 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:03:36,197 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:36,197 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 200 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-24 23:03:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2024-09-24 23:03:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 63 states have (on average 1.380952380952381) internal successors, (87), 67 states have internal predecessors, (87), 72 states have call successors, (72), 7 states have call predecessors, (72), 6 states have return successors, (71), 67 states have call predecessors, (71), 71 states have call successors, (71) [2024-09-24 23:03:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2024-09-24 23:03:36,246 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 19 [2024-09-24 23:03:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:36,246 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2024-09-24 23:03:36,246 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:03:36,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2024-09-24 23:03:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:03:36,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:36,248 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:36,248 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:03:36,248 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:36,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:36,249 INFO L85 PathProgramCache]: Analyzing trace with hash 303375166, now seen corresponding path program 1 times [2024-09-24 23:03:36,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:36,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339578656] [2024-09-24 23:03:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:36,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:03:36,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339578656] [2024-09-24 23:03:36,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339578656] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:36,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:36,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-24 23:03:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009470537] [2024-09-24 23:03:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:36,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:03:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:03:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:03:36,382 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:03:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:36,616 INFO L93 Difference]: Finished difference Result 208 states and 342 transitions. [2024-09-24 23:03:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-24 23:03:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:36,621 INFO L225 Difference]: With dead ends: 208 [2024-09-24 23:03:36,621 INFO L226 Difference]: Without dead ends: 206 [2024-09-24 23:03:36,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:03:36,623 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:36,623 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-24 23:03:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2024-09-24 23:03:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 94 states have internal predecessors, (122), 108 states have call successors, (108), 8 states have call predecessors, (108), 7 states have return successors, (107), 100 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-24 23:03:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 337 transitions. [2024-09-24 23:03:36,706 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 337 transitions. Word has length 19 [2024-09-24 23:03:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:36,706 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 337 transitions. [2024-09-24 23:03:36,707 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:03:36,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 337 transitions. [2024-09-24 23:03:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:03:36,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:36,709 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:36,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-24 23:03:36,709 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:36,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -283430848, now seen corresponding path program 1 times [2024-09-24 23:03:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:36,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264210575] [2024-09-24 23:03:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:03:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:36,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264210575] [2024-09-24 23:03:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264210575] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:36,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:36,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:03:36,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113156545] [2024-09-24 23:03:36,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:36,752 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:03:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:03:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:03:36,753 INFO L87 Difference]: Start difference. First operand 203 states and 337 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:03:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:36,862 INFO L93 Difference]: Finished difference Result 387 states and 649 transitions. [2024-09-24 23:03:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:03:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-24 23:03:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:36,867 INFO L225 Difference]: With dead ends: 387 [2024-09-24 23:03:36,869 INFO L226 Difference]: Without dead ends: 305 [2024-09-24 23:03:36,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:03:36,871 INFO L434 NwaCegarLoop]: 81 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:36,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:03:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-24 23:03:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 250. [2024-09-24 23:03:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 114 states have internal predecessors, (150), 136 states have call successors, (136), 8 states have call predecessors, (136), 7 states have return successors, (135), 127 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-24 23:03:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 421 transitions. [2024-09-24 23:03:36,960 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 421 transitions. Word has length 19 [2024-09-24 23:03:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:36,960 INFO L474 AbstractCegarLoop]: Abstraction has 250 states and 421 transitions. [2024-09-24 23:03:36,961 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:03:36,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 421 transitions. [2024-09-24 23:03:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:03:36,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:36,963 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:36,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-24 23:03:36,963 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:36,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1858602097, now seen corresponding path program 1 times [2024-09-24 23:03:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:36,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480751655] [2024-09-24 23:03:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:03:37,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480751655] [2024-09-24 23:03:37,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480751655] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:37,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:37,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-24 23:03:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131721575] [2024-09-24 23:03:37,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:37,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:03:37,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:03:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:03:37,092 INFO L87 Difference]: Start difference. First operand 250 states and 421 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:03:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:37,282 INFO L93 Difference]: Finished difference Result 338 states and 568 transitions. [2024-09-24 23:03:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-24 23:03:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:37,285 INFO L225 Difference]: With dead ends: 338 [2024-09-24 23:03:37,286 INFO L226 Difference]: Without dead ends: 336 [2024-09-24 23:03:37,286 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:03:37,287 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:37,287 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 248 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-09-24 23:03:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 304. [2024-09-24 23:03:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 132 states have (on average 1.4242424242424243) internal successors, (188), 146 states have internal predecessors, (188), 162 states have call successors, (162), 10 states have call predecessors, (162), 9 states have return successors, (161), 147 states have call predecessors, (161), 161 states have call successors, (161) [2024-09-24 23:03:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 511 transitions. [2024-09-24 23:03:37,405 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 511 transitions. Word has length 26 [2024-09-24 23:03:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:37,406 INFO L474 AbstractCegarLoop]: Abstraction has 304 states and 511 transitions. [2024-09-24 23:03:37,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:03:37,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 511 transitions. [2024-09-24 23:03:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-24 23:03:37,409 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:37,410 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:37,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-24 23:03:37,410 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:37,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:37,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1261754835, now seen corresponding path program 1 times [2024-09-24 23:03:37,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:37,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073142208] [2024-09-24 23:03:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:37,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-24 23:03:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:03:37,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073142208] [2024-09-24 23:03:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073142208] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:37,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:37,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-24 23:03:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841108776] [2024-09-24 23:03:37,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:37,507 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:03:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:03:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:03:37,508 INFO L87 Difference]: Start difference. First operand 304 states and 511 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:03:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:37,726 INFO L93 Difference]: Finished difference Result 370 states and 611 transitions. [2024-09-24 23:03:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:03:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-09-24 23:03:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:37,731 INFO L225 Difference]: With dead ends: 370 [2024-09-24 23:03:37,731 INFO L226 Difference]: Without dead ends: 368 [2024-09-24 23:03:37,733 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:03:37,735 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 25 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:37,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 251 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-09-24 23:03:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2024-09-24 23:03:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 146 states have (on average 1.4109589041095891) internal successors, (206), 164 states have internal predecessors, (206), 186 states have call successors, (186), 12 states have call predecessors, (186), 11 states have return successors, (185), 167 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-24 23:03:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 577 transitions. [2024-09-24 23:03:37,828 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 577 transitions. Word has length 29 [2024-09-24 23:03:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:37,828 INFO L474 AbstractCegarLoop]: Abstraction has 344 states and 577 transitions. [2024-09-24 23:03:37,829 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:03:37,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 577 transitions. [2024-09-24 23:03:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 23:03:37,830 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:37,830 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:37,831 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-24 23:03:37,831 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:37,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 887335745, now seen corresponding path program 1 times [2024-09-24 23:03:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:37,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665383929] [2024-09-24 23:03:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:03:37,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:37,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665383929] [2024-09-24 23:03:37,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665383929] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:37,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:37,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:03:37,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471815060] [2024-09-24 23:03:37,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:37,912 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:03:37,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:37,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:03:37,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:03:37,913 INFO L87 Difference]: Start difference. First operand 344 states and 577 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:03:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:38,225 INFO L93 Difference]: Finished difference Result 795 states and 1334 transitions. [2024-09-24 23:03:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:38,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-09-24 23:03:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:38,233 INFO L225 Difference]: With dead ends: 795 [2024-09-24 23:03:38,233 INFO L226 Difference]: Without dead ends: 540 [2024-09-24 23:03:38,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:03:38,238 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 53 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:38,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 183 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:03:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-24 23:03:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 345. [2024-09-24 23:03:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 147 states have (on average 1.401360544217687) internal successors, (206), 165 states have internal predecessors, (206), 186 states have call successors, (186), 12 states have call predecessors, (186), 11 states have return successors, (185), 167 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-24 23:03:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 577 transitions. [2024-09-24 23:03:38,344 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 577 transitions. Word has length 28 [2024-09-24 23:03:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:38,345 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 577 transitions. [2024-09-24 23:03:38,345 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-24 23:03:38,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 577 transitions. [2024-09-24 23:03:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:03:38,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:38,346 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:38,346 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-24 23:03:38,347 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:38,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash 969267811, now seen corresponding path program 1 times [2024-09-24 23:03:38,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395118315] [2024-09-24 23:03:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:38,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:38,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:38,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:38,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:03:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:03:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395118315] [2024-09-24 23:03:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395118315] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:38,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:38,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-24 23:03:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598098950] [2024-09-24 23:03:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:38,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:03:38,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:03:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:03:38,479 INFO L87 Difference]: Start difference. First operand 345 states and 577 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:03:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:38,794 INFO L93 Difference]: Finished difference Result 542 states and 924 transitions. [2024-09-24 23:03:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-09-24 23:03:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:38,800 INFO L225 Difference]: With dead ends: 542 [2024-09-24 23:03:38,801 INFO L226 Difference]: Without dead ends: 540 [2024-09-24 23:03:38,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:03:38,802 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:38,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 271 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:03:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-24 23:03:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 492. [2024-09-24 23:03:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 202 states have (on average 1.4306930693069306) internal successors, (289), 232 states have internal predecessors, (289), 277 states have call successors, (277), 13 states have call predecessors, (277), 12 states have return successors, (276), 246 states have call predecessors, (276), 276 states have call successors, (276) [2024-09-24 23:03:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 842 transitions. [2024-09-24 23:03:38,917 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 842 transitions. Word has length 31 [2024-09-24 23:03:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:38,918 INFO L474 AbstractCegarLoop]: Abstraction has 492 states and 842 transitions. [2024-09-24 23:03:38,918 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:03:38,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 842 transitions. [2024-09-24 23:03:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:03:38,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:38,919 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:38,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-24 23:03:38,920 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:38,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1109816421, now seen corresponding path program 1 times [2024-09-24 23:03:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:38,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188400369] [2024-09-24 23:03:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:38,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:03:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:03:39,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:39,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188400369] [2024-09-24 23:03:39,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188400369] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:39,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:39,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-24 23:03:39,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265176512] [2024-09-24 23:03:39,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:39,021 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:03:39,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:03:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:03:39,022 INFO L87 Difference]: Start difference. First operand 492 states and 842 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:03:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:39,339 INFO L93 Difference]: Finished difference Result 562 states and 954 transitions. [2024-09-24 23:03:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:03:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-09-24 23:03:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:39,345 INFO L225 Difference]: With dead ends: 562 [2024-09-24 23:03:39,345 INFO L226 Difference]: Without dead ends: 560 [2024-09-24 23:03:39,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:03:39,347 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:39,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 208 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-09-24 23:03:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 499. [2024-09-24 23:03:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 205 states have (on average 1.424390243902439) internal successors, (292), 235 states have internal predecessors, (292), 280 states have call successors, (280), 14 states have call predecessors, (280), 13 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-24 23:03:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 851 transitions. [2024-09-24 23:03:39,481 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 851 transitions. Word has length 31 [2024-09-24 23:03:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:39,482 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 851 transitions. [2024-09-24 23:03:39,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-24 23:03:39,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 851 transitions. [2024-09-24 23:03:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:03:39,486 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:39,486 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:39,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-24 23:03:39,486 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:39,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:39,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529802, now seen corresponding path program 1 times [2024-09-24 23:03:39,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:39,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974928564] [2024-09-24 23:03:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-24 23:03:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-24 23:03:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:03:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-24 23:03:39,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:39,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974928564] [2024-09-24 23:03:39,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974928564] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:39,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:39,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-24 23:03:39,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858006655] [2024-09-24 23:03:39,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:39,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:03:39,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:03:39,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:03:39,572 INFO L87 Difference]: Start difference. First operand 499 states and 851 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-24 23:03:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:39,855 INFO L93 Difference]: Finished difference Result 557 states and 928 transitions. [2024-09-24 23:03:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2024-09-24 23:03:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:39,860 INFO L225 Difference]: With dead ends: 557 [2024-09-24 23:03:39,861 INFO L226 Difference]: Without dead ends: 555 [2024-09-24 23:03:39,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:03:39,862 INFO L434 NwaCegarLoop]: 70 mSDtfsCounter, 35 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:39,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 259 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-09-24 23:03:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 503. [2024-09-24 23:03:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 208 states have (on average 1.4182692307692308) internal successors, (295), 238 states have internal predecessors, (295), 280 states have call successors, (280), 15 states have call predecessors, (280), 14 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-24 23:03:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 854 transitions. [2024-09-24 23:03:39,984 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 854 transitions. Word has length 41 [2024-09-24 23:03:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:39,984 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 854 transitions. [2024-09-24 23:03:39,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-24 23:03:39,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 854 transitions. [2024-09-24 23:03:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:03:39,986 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:39,986 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:39,986 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-24 23:03:39,986 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:39,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2122421222, now seen corresponding path program 1 times [2024-09-24 23:03:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:39,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807698788] [2024-09-24 23:03:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:03:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:03:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:03:40,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807698788] [2024-09-24 23:03:40,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807698788] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:40,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:40,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-24 23:03:40,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194639813] [2024-09-24 23:03:40,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:40,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:03:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:03:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:03:40,069 INFO L87 Difference]: Start difference. First operand 503 states and 854 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:03:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:40,328 INFO L93 Difference]: Finished difference Result 534 states and 893 transitions. [2024-09-24 23:03:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:03:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-09-24 23:03:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:40,334 INFO L225 Difference]: With dead ends: 534 [2024-09-24 23:03:40,334 INFO L226 Difference]: Without dead ends: 532 [2024-09-24 23:03:40,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:03:40,336 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:40,336 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 188 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:40,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-09-24 23:03:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 511. [2024-09-24 23:03:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 214 states have (on average 1.4065420560747663) internal successors, (301), 244 states have internal predecessors, (301), 280 states have call successors, (280), 17 states have call predecessors, (280), 16 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-24 23:03:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 860 transitions. [2024-09-24 23:03:40,476 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 860 transitions. Word has length 41 [2024-09-24 23:03:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:40,477 INFO L474 AbstractCegarLoop]: Abstraction has 511 states and 860 transitions. [2024-09-24 23:03:40,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:03:40,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 860 transitions. [2024-09-24 23:03:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-24 23:03:40,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:40,479 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:40,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-24 23:03:40,480 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:40,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 290316784, now seen corresponding path program 1 times [2024-09-24 23:03:40,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:40,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501143847] [2024-09-24 23:03:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:03:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:03:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:03:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-24 23:03:40,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:40,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501143847] [2024-09-24 23:03:40,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501143847] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:40,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:03:40,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-24 23:03:40,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072695193] [2024-09-24 23:03:40,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:40,605 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:03:40,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:03:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:03:40,608 INFO L87 Difference]: Start difference. First operand 511 states and 860 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-24 23:03:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:40,863 INFO L93 Difference]: Finished difference Result 578 states and 966 transitions. [2024-09-24 23:03:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:03:40,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2024-09-24 23:03:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:40,869 INFO L225 Difference]: With dead ends: 578 [2024-09-24 23:03:40,869 INFO L226 Difference]: Without dead ends: 576 [2024-09-24 23:03:40,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:03:40,871 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 41 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:40,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 234 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-24 23:03:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 515. [2024-09-24 23:03:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 217 states have (on average 1.400921658986175) internal successors, (304), 247 states have internal predecessors, (304), 280 states have call successors, (280), 18 states have call predecessors, (280), 17 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-24 23:03:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 863 transitions. [2024-09-24 23:03:41,006 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 863 transitions. Word has length 53 [2024-09-24 23:03:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:41,006 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 863 transitions. [2024-09-24 23:03:41,007 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-24 23:03:41,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 863 transitions. [2024-09-24 23:03:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-24 23:03:41,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:41,009 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:41,009 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-24 23:03:41,009 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:41,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash 822747500, now seen corresponding path program 1 times [2024-09-24 23:03:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:41,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554135988] [2024-09-24 23:03:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:41,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:03:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-24 23:03:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:03:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:03:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:03:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-24 23:03:41,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554135988] [2024-09-24 23:03:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554135988] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:03:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110769984] [2024-09-24 23:03:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:41,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:41,089 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) [2024-09-24 23:03:41,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:03:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:41,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-24 23:03:41,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:03:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-24 23:03:41,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:03:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110769984] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:41,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:03:41,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-09-24 23:03:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267406088] [2024-09-24 23:03:41,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:41,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:03:41,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:41,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:03:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:03:41,308 INFO L87 Difference]: Start difference. First operand 515 states and 863 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-24 23:03:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:41,658 INFO L93 Difference]: Finished difference Result 932 states and 1539 transitions. [2024-09-24 23:03:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:03:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2024-09-24 23:03:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:41,663 INFO L225 Difference]: With dead ends: 932 [2024-09-24 23:03:41,663 INFO L226 Difference]: Without dead ends: 476 [2024-09-24 23:03:41,666 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:03:41,666 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 34 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:41,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 216 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-09-24 23:03:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 446. [2024-09-24 23:03:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 196 states have (on average 1.3673469387755102) internal successors, (268), 220 states have internal predecessors, (268), 232 states have call successors, (232), 18 states have call predecessors, (232), 17 states have return successors, (231), 207 states have call predecessors, (231), 231 states have call successors, (231) [2024-09-24 23:03:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 731 transitions. [2024-09-24 23:03:41,781 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 731 transitions. Word has length 61 [2024-09-24 23:03:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:41,781 INFO L474 AbstractCegarLoop]: Abstraction has 446 states and 731 transitions. [2024-09-24 23:03:41,781 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-24 23:03:41,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 731 transitions. [2024-09-24 23:03:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-24 23:03:41,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:41,784 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:41,801 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:03:41,987 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:03:41,988 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:41,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash 968879790, now seen corresponding path program 1 times [2024-09-24 23:03:41,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:41,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823909805] [2024-09-24 23:03:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:41,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-24 23:03:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-24 23:03:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:03:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-24 23:03:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-24 23:03:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-24 23:03:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:03:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-24 23:03:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-24 23:03:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-24 23:03:42,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:42,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823909805] [2024-09-24 23:03:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823909805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:03:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332293985] [2024-09-24 23:03:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:42,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:42,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:42,141 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) [2024-09-24 23:03:42,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:03:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:42,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:03:42,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:03:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-24 23:03:42,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:03:42,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332293985] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:42,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:03:42,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-09-24 23:03:42,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642437396] [2024-09-24 23:03:42,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:42,449 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:03:42,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:03:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:03:42,450 INFO L87 Difference]: Start difference. First operand 446 states and 731 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-24 23:03:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:42,855 INFO L93 Difference]: Finished difference Result 813 states and 1310 transitions. [2024-09-24 23:03:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-24 23:03:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2024-09-24 23:03:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:42,860 INFO L225 Difference]: With dead ends: 813 [2024-09-24 23:03:42,860 INFO L226 Difference]: Without dead ends: 375 [2024-09-24 23:03:42,863 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:03:42,865 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 44 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:42,866 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 212 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:03:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-09-24 23:03:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 340. [2024-09-24 23:03:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 155 states have (on average 1.3290322580645162) internal successors, (206), 171 states have internal predecessors, (206), 168 states have call successors, (168), 17 states have call predecessors, (168), 16 states have return successors, (167), 151 states have call predecessors, (167), 167 states have call successors, (167) [2024-09-24 23:03:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 541 transitions. [2024-09-24 23:03:42,961 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 541 transitions. Word has length 83 [2024-09-24 23:03:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:42,962 INFO L474 AbstractCegarLoop]: Abstraction has 340 states and 541 transitions. [2024-09-24 23:03:42,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-24 23:03:42,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 541 transitions. [2024-09-24 23:03:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-24 23:03:42,964 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:42,964 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:42,981 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:03:43,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:03:43,169 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:43,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1787747476, now seen corresponding path program 1 times [2024-09-24 23:03:43,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:43,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567454278] [2024-09-24 23:03:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-24 23:03:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-24 23:03:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:03:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-24 23:03:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-24 23:03:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-24 23:03:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:03:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-24 23:03:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-24 23:03:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-24 23:03:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567454278] [2024-09-24 23:03:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567454278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:03:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066225025] [2024-09-24 23:03:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:43,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:43,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:43,294 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) [2024-09-24 23:03:43,295 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:03:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:43,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 23:03:43,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:03:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-24 23:03:43,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:03:43,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066225025] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:03:43,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:03:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-24 23:03:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113586410] [2024-09-24 23:03:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:03:43,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:03:43,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:03:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:03:43,560 INFO L87 Difference]: Start difference. First operand 340 states and 541 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-24 23:03:43,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:43,835 INFO L93 Difference]: Finished difference Result 639 states and 1012 transitions. [2024-09-24 23:03:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:03:43,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2024-09-24 23:03:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:43,840 INFO L225 Difference]: With dead ends: 639 [2024-09-24 23:03:43,840 INFO L226 Difference]: Without dead ends: 293 [2024-09-24 23:03:43,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:03:43,842 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:43,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 183 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:03:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-24 23:03:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2024-09-24 23:03:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 130 states have (on average 1.3076923076923077) internal successors, (170), 144 states have internal predecessors, (170), 136 states have call successors, (136), 17 states have call predecessors, (136), 16 states have return successors, (135), 121 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-24 23:03:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 441 transitions. [2024-09-24 23:03:43,904 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 441 transitions. Word has length 83 [2024-09-24 23:03:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:43,904 INFO L474 AbstractCegarLoop]: Abstraction has 283 states and 441 transitions. [2024-09-24 23:03:43,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-24 23:03:43,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 441 transitions. [2024-09-24 23:03:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-24 23:03:43,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:43,907 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:43,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:03:44,107 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:03:44,108 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:44,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash -680780915, now seen corresponding path program 1 times [2024-09-24 23:03:44,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:44,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647320398] [2024-09-24 23:03:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:44,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:03:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:03:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:03:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-24 23:03:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-24 23:03:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:03:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-24 23:03:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-24 23:03:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-24 23:03:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-09-24 23:03:44,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:44,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647320398] [2024-09-24 23:03:44,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647320398] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:03:44,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256029443] [2024-09-24 23:03:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:44,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:44,197 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) [2024-09-24 23:03:44,198 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:03:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:44,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-24 23:03:44,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:03:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-24 23:03:44,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:03:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2024-09-24 23:03:44,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256029443] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:03:44,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:03:44,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-09-24 23:03:44,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932430793] [2024-09-24 23:03:44,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:03:44,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-24 23:03:44,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:44,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-24 23:03:44,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:03:44,422 INFO L87 Difference]: Start difference. First operand 283 states and 441 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2024-09-24 23:03:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:45,412 INFO L93 Difference]: Finished difference Result 571 states and 876 transitions. [2024-09-24 23:03:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-24 23:03:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 88 [2024-09-24 23:03:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:45,417 INFO L225 Difference]: With dead ends: 571 [2024-09-24 23:03:45,417 INFO L226 Difference]: Without dead ends: 343 [2024-09-24 23:03:45,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2024-09-24 23:03:45,419 INFO L434 NwaCegarLoop]: 158 mSDtfsCounter, 205 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:45,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 731 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:03:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-24 23:03:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 237. [2024-09-24 23:03:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 127 states have internal predecessors, (146), 102 states have call successors, (102), 17 states have call predecessors, (102), 16 states have return successors, (101), 92 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-24 23:03:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2024-09-24 23:03:45,484 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 88 [2024-09-24 23:03:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:45,485 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2024-09-24 23:03:45,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2024-09-24 23:03:45,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2024-09-24 23:03:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-24 23:03:45,487 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:45,487 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:45,505 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-24 23:03:45,687 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:45,688 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:45,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1903110671, now seen corresponding path program 1 times [2024-09-24 23:03:45,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:45,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316794810] [2024-09-24 23:03:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:03:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:03:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:03:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-24 23:03:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-24 23:03:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:03:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-24 23:03:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-24 23:03:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-24 23:03:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:03:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-24 23:03:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-24 23:03:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-24 23:03:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-24 23:03:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316794810] [2024-09-24 23:03:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316794810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:03:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99690939] [2024-09-24 23:03:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:45,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:45,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:45,860 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) [2024-09-24 23:03:45,861 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:03:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:45,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 23:03:45,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:03:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-24 23:03:46,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:03:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-24 23:03:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99690939] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:03:46,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:03:46,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-09-24 23:03:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083824644] [2024-09-24 23:03:46,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:03:46,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:03:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:03:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:03:46,356 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-24 23:03:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:48,515 INFO L93 Difference]: Finished difference Result 800 states and 1252 transitions. [2024-09-24 23:03:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-24 23:03:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) Word has length 110 [2024-09-24 23:03:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:48,520 INFO L225 Difference]: With dead ends: 800 [2024-09-24 23:03:48,520 INFO L226 Difference]: Without dead ends: 469 [2024-09-24 23:03:48,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=943, Invalid=2839, Unknown=0, NotChecked=0, Total=3782 [2024-09-24 23:03:48,523 INFO L434 NwaCegarLoop]: 156 mSDtfsCounter, 371 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:48,523 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1097 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-24 23:03:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-09-24 23:03:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 372. [2024-09-24 23:03:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 173 states have (on average 1.2658959537572254) internal successors, (219), 187 states have internal predecessors, (219), 182 states have call successors, (182), 17 states have call predecessors, (182), 16 states have return successors, (181), 167 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:03:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 582 transitions. [2024-09-24 23:03:48,670 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 582 transitions. Word has length 110 [2024-09-24 23:03:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:48,671 INFO L474 AbstractCegarLoop]: Abstraction has 372 states and 582 transitions. [2024-09-24 23:03:48,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-24 23:03:48,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 582 transitions. [2024-09-24 23:03:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-24 23:03:48,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:48,674 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:48,693 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-24 23:03:48,874 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-24 23:03:48,875 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:48,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash -853516595, now seen corresponding path program 1 times [2024-09-24 23:03:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:48,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855414609] [2024-09-24 23:03:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:48,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:03:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:03:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:03:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-24 23:03:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-24 23:03:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:03:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-24 23:03:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-24 23:03:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-24 23:03:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:03:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-24 23:03:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-24 23:03:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-24 23:03:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-24 23:03:49,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:49,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855414609] [2024-09-24 23:03:49,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855414609] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:03:49,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612893080] [2024-09-24 23:03:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:49,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:49,045 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) [2024-09-24 23:03:49,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:03:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:49,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:03:49,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:03:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-24 23:03:49,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:03:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-24 23:03:49,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612893080] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:03:49,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:03:49,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-24 23:03:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342762447] [2024-09-24 23:03:49,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:03:49,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:03:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:03:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:03:49,309 INFO L87 Difference]: Start difference. First operand 372 states and 582 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-24 23:03:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:49,696 INFO L93 Difference]: Finished difference Result 434 states and 675 transitions. [2024-09-24 23:03:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-24 23:03:49,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 110 [2024-09-24 23:03:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:49,701 INFO L225 Difference]: With dead ends: 434 [2024-09-24 23:03:49,701 INFO L226 Difference]: Without dead ends: 432 [2024-09-24 23:03:49,702 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:03:49,702 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 58 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:49,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 394 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:03:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-09-24 23:03:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 376. [2024-09-24 23:03:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 176 states have (on average 1.2613636363636365) internal successors, (222), 190 states have internal predecessors, (222), 182 states have call successors, (182), 18 states have call predecessors, (182), 17 states have return successors, (181), 167 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:03:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2024-09-24 23:03:49,830 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 110 [2024-09-24 23:03:49,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:49,831 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2024-09-24 23:03:49,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-24 23:03:49,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2024-09-24 23:03:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-24 23:03:49,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:03:49,833 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:49,850 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-24 23:03:50,033 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:50,034 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:03:50,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1133746567, now seen corresponding path program 2 times [2024-09-24 23:03:50,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:03:50,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147333507] [2024-09-24 23:03:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:03:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:03:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:03:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:03:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-24 23:03:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:03:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:03:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:03:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:03:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-24 23:03:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-24 23:03:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:03:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-24 23:03:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-24 23:03:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-24 23:03:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:03:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-24 23:03:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-24 23:03:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-24 23:03:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-24 23:03:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:03:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 18 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2024-09-24 23:03:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:03:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147333507] [2024-09-24 23:03:50,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147333507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:03:50,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076408026] [2024-09-24 23:03:50,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:03:50,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:50,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:03:50,181 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) [2024-09-24 23:03:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:03:50,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:03:50,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:03:50,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 23:03:50,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:03:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-24 23:03:50,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:03:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-24 23:03:50,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076408026] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:03:50,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:03:50,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2024-09-24 23:03:50,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246286542] [2024-09-24 23:03:50,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:03:50,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-24 23:03:50,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:03:50,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-24 23:03:50,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:03:50,673 INFO L87 Difference]: Start difference. First operand 376 states and 585 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2024-09-24 23:03:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:03:52,022 INFO L93 Difference]: Finished difference Result 698 states and 1108 transitions. [2024-09-24 23:03:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-24 23:03:52,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) Word has length 115 [2024-09-24 23:03:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:03:52,025 INFO L225 Difference]: With dead ends: 698 [2024-09-24 23:03:52,025 INFO L226 Difference]: Without dead ends: 0 [2024-09-24 23:03:52,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2024-09-24 23:03:52,028 INFO L434 NwaCegarLoop]: 78 mSDtfsCounter, 281 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:03:52,028 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 586 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:03:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-24 23:03:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-24 23:03:52,029 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) [2024-09-24 23:03:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-24 23:03:52,030 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2024-09-24 23:03:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:03:52,030 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-24 23:03:52,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2024-09-24 23:03:52,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:03:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-24 23:03:52,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-24 23:03:52,033 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-24 23:03:52,050 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-24 23:03:52,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:03:52,237 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:03:52,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.