./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d5fb336862157190b75f459fa5ac35efb8ca70e207f909b082fde37cf98e7f7 --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-de32597-m [2024-09-17 18:59:08,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:59:08,856 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:59:08,861 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:59:08,861 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:59:08,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:59:08,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:59:08,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:59:08,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:59:08,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:59:08,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:59:08,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:59:08,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:59:08,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:59:08,890 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:59:08,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:59:08,890 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:59:08,890 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:59:08,891 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:59:08,891 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:59:08,891 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:59:08,892 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:59:08,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:59:08,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:59:08,893 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:59:08,893 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:59:08,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:59:08,894 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:59:08,894 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:59:08,894 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:59:08,895 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:59:08,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:59:08,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:59:08,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:59:08,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:59:08,896 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:59:08,896 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:59:08,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:59:08,897 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:59:08,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:59:08,897 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:59:08,898 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:59:08,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d5fb336862157190b75f459fa5ac35efb8ca70e207f909b082fde37cf98e7f7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:59:09,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:59:09,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:59:09,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:59:09,109 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:59:09,109 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:59:09,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c [2024-09-17 18:59:10,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:59:10,496 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:59:10,496 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c [2024-09-17 18:59:10,509 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8fabd7a62/5b8b1e25164849c995599a643368c78e/FLAG545053a43 [2024-09-17 18:59:10,899 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8fabd7a62/5b8b1e25164849c995599a643368c78e [2024-09-17 18:59:10,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:59:10,901 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:59:10,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:59:10,903 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:59:10,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:59:10,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:59:10" (1/1) ... [2024-09-17 18:59:10,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@281d3b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:10, skipping insertion in model container [2024-09-17 18:59:10,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:59:10" (1/1) ... [2024-09-17 18:59:10,926 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:59:11,052 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2024-09-17 18:59:11,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:59:11,086 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:59:11,094 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2024-09-17 18:59:11,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:59:11,111 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:59:11,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11 WrapperNode [2024-09-17 18:59:11,114 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:59:11,115 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:59:11,115 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:59:11,115 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:59:11,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,129 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:59:11,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:59:11,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:59:11,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:59:11,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:59:11,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,144 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,152 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]. [2024-09-17 18:59:11,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,157 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,158 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:59:11,160 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:59:11,160 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:59:11,160 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:59:11,161 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (1/1) ... [2024-09-17 18:59:11,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:59:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:11,213 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) [2024-09-17 18:59:11,214 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 [2024-09-17 18:59:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:59:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 18:59:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 18:59:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:59:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:59:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:59:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:59:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:59:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:59:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:59:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:59:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:59:11,311 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:59:11,313 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:59:11,481 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-17 18:59:11,482 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:59:11,504 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:59:11,504 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 18:59:11,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:59:11 BoogieIcfgContainer [2024-09-17 18:59:11,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:59:11,506 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:59:11,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:59:11,509 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:59:11,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:59:10" (1/3) ... [2024-09-17 18:59:11,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd276f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:59:11, skipping insertion in model container [2024-09-17 18:59:11,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:59:11" (2/3) ... [2024-09-17 18:59:11,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd276f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:59:11, skipping insertion in model container [2024-09-17 18:59:11,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:59:11" (3/3) ... [2024-09-17 18:59:11,512 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2024-09-17 18:59:11,524 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:59:11,525 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:59:11,570 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:59:11,576 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;@e7efd23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:59:11,576 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:59:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:59:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 18:59:11,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:11,585 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:11,586 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:11,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-17 18:59:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:11,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888944710] [2024-09-17 18:59:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:11,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:59:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:59:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:59:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:59:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:59:11,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888944710] [2024-09-17 18:59:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888944710] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:59:11,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:59:11,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 18:59:11,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503571938] [2024-09-17 18:59:11,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:59:11,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 18:59:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 18:59:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:59:11,751 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:59:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:11,775 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-17 18:59:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 18:59:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-17 18:59:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:11,783 INFO L225 Difference]: With dead ends: 66 [2024-09-17 18:59:11,783 INFO L226 Difference]: Without dead ends: 32 [2024-09-17 18:59:11,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:59:11,787 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:11,788 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:59:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-17 18:59:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-17 18:59:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:59:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-17 18:59:11,816 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-17 18:59:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:11,816 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-17 18:59:11,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 18:59:11,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-17 18:59:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 18:59:11,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:11,819 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:11,819 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:59:11,819 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:11,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-17 18:59:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:11,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826349192] [2024-09-17 18:59:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:59:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:59:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:59:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:59:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:59:11,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826349192] [2024-09-17 18:59:11,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826349192] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:59:11,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:59:11,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:59:11,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530182991] [2024-09-17 18:59:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:59:11,977 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:59:11,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:59:11,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:59:11,984 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-17 18:59:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:12,052 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-17 18:59:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:59:12,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-17 18:59:12,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:12,053 INFO L225 Difference]: With dead ends: 45 [2024-09-17 18:59:12,053 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 18:59:12,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:59:12,054 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:12,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:59:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 18:59:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-17 18:59:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:59:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-17 18:59:12,068 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-17 18:59:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:12,068 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-17 18:59:12,068 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-17 18:59:12,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-17 18:59:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 18:59:12,070 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:12,070 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:12,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:59:12,070 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:12,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-17 18:59:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:12,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884500317] [2024-09-17 18:59:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:12,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:12,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:59:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:12,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:59:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:12,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:59:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:12,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:59:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:12,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:59:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:59:12,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:12,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884500317] [2024-09-17 18:59:12,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884500317] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:59:12,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:59:12,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:59:12,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929344165] [2024-09-17 18:59:12,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:59:12,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:59:12,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:59:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:59:12,283 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2024-09-17 18:59:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:12,386 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-17 18:59:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:59:12,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 32 [2024-09-17 18:59:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:12,391 INFO L225 Difference]: With dead ends: 49 [2024-09-17 18:59:12,391 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 18:59:12,392 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:59:12,393 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:12,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:59:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 18:59:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-17 18:59:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:59:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-17 18:59:12,410 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-17 18:59:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:12,410 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-17 18:59:12,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2024-09-17 18:59:12,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-17 18:59:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-17 18:59:12,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:12,411 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:12,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 18:59:12,412 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:12,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-17 18:59:12,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:12,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618566923] [2024-09-17 18:59:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:12,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:59:12,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177387974] [2024-09-17 18:59:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:12,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:12,443 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) [2024-09-17 18:59:12,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:59:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:12,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:59:12,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-17 18:59:12,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:59:12,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:12,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618566923] [2024-09-17 18:59:12,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:59:12,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177387974] [2024-09-17 18:59:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177387974] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:59:12,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:59:12,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:59:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452156992] [2024-09-17 18:59:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:59:12,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:59:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:59:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:59:12,635 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:59:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:12,690 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-17 18:59:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:59:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-17 18:59:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:12,691 INFO L225 Difference]: With dead ends: 66 [2024-09-17 18:59:12,691 INFO L226 Difference]: Without dead ends: 53 [2024-09-17 18:59:12,692 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:59:12,692 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:12,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:59:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-17 18:59:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-17 18:59:12,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:59:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-17 18:59:12,707 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-17 18:59:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:12,707 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-17 18:59:12,707 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-17 18:59:12,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-17 18:59:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-17 18:59:12,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:12,708 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2024-09-17 18:59:12,724 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 18:59:12,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:12,909 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:12,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-17 18:59:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:12,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864299076] [2024-09-17 18:59:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:59:12,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722826232] [2024-09-17 18:59:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:12,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:12,962 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) [2024-09-17 18:59:12,964 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:59:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:13,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-17 18:59:13,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 18:59:13,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:59:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 18:59:13,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:13,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864299076] [2024-09-17 18:59:13,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:59:13,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722826232] [2024-09-17 18:59:13,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722826232] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:59:13,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:59:13,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-17 18:59:13,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55701670] [2024-09-17 18:59:13,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:59:13,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:59:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:59:13,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:59:13,298 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 18:59:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:13,396 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-17 18:59:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:59:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-17 18:59:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:13,399 INFO L225 Difference]: With dead ends: 68 [2024-09-17 18:59:13,400 INFO L226 Difference]: Without dead ends: 66 [2024-09-17 18:59:13,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:59:13,402 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:13,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:59:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-17 18:59:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-17 18:59:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:59:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-17 18:59:13,417 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-17 18:59:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:13,417 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-17 18:59:13,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 18:59:13,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-17 18:59:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-17 18:59:13,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:13,419 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-09-17 18:59:13,430 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:59:13,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:13,623 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:13,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:13,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-17 18:59:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:13,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832209012] [2024-09-17 18:59:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:59:13,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53482764] [2024-09-17 18:59:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:13,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:13,640 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) [2024-09-17 18:59:13,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:59:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:13,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:59:13,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-17 18:59:13,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:59:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-17 18:59:13,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:13,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832209012] [2024-09-17 18:59:13,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:59:13,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53482764] [2024-09-17 18:59:13,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53482764] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 18:59:13,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:59:13,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-17 18:59:13,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948923314] [2024-09-17 18:59:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:59:13,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:59:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:59:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:59:13,885 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:59:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:13,941 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-17 18:59:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:59:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2024-09-17 18:59:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:13,944 INFO L225 Difference]: With dead ends: 73 [2024-09-17 18:59:13,944 INFO L226 Difference]: Without dead ends: 71 [2024-09-17 18:59:13,944 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:59:13,946 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:13,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:59:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-17 18:59:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-17 18:59:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:59:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-17 18:59:13,969 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-17 18:59:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:13,970 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-17 18:59:13,970 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:59:13,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-17 18:59:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-17 18:59:13,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:13,971 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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] [2024-09-17 18:59:13,985 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:59:14,171 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 18:59:14,172 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:14,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-17 18:59:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:14,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440005773] [2024-09-17 18:59:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:14,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:59:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:59:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:59:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:59:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:59:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:59:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:59:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:59:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:59:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:59:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-17 18:59:14,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440005773] [2024-09-17 18:59:14,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440005773] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:59:14,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:59:14,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:59:14,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103334296] [2024-09-17 18:59:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:59:14,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:59:14,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:59:14,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:59:14,292 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-17 18:59:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:14,354 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-17 18:59:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:59:14,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-17 18:59:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:14,356 INFO L225 Difference]: With dead ends: 78 [2024-09-17 18:59:14,356 INFO L226 Difference]: Without dead ends: 66 [2024-09-17 18:59:14,356 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:59:14,357 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:14,357 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:59:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-17 18:59:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-17 18:59:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:59:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-17 18:59:14,379 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-17 18:59:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:14,383 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-17 18:59:14,383 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-17 18:59:14,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-17 18:59:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-17 18:59:14,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:14,384 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:14,384 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-17 18:59:14,384 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:14,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-17 18:59:14,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:14,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983499109] [2024-09-17 18:59:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:14,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:59:14,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299358540] [2024-09-17 18:59:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:14,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:14,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:14,424 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) [2024-09-17 18:59:14,425 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:59:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:14,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-17 18:59:14,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-17 18:59:14,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:59:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-17 18:59:16,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:16,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983499109] [2024-09-17 18:59:16,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:59:16,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299358540] [2024-09-17 18:59:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299358540] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:59:16,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:59:16,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-17 18:59:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113360409] [2024-09-17 18:59:16,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:59:16,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:59:16,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:59:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:59:16,233 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-17 18:59:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:17,090 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2024-09-17 18:59:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 18:59:17,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 74 [2024-09-17 18:59:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:17,092 INFO L225 Difference]: With dead ends: 153 [2024-09-17 18:59:17,092 INFO L226 Difference]: Without dead ends: 130 [2024-09-17 18:59:17,093 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:59:17,093 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:17,093 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 256 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:59:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-17 18:59:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-09-17 18:59:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-17 18:59:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-17 18:59:17,120 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-17 18:59:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:17,120 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-17 18:59:17,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-17 18:59:17,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-17 18:59:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-17 18:59:17,122 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:17,122 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:17,134 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 18:59:17,325 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:17,326 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:17,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-17 18:59:17,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:17,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777939375] [2024-09-17 18:59:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:17,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:59:17,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990537116] [2024-09-17 18:59:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:17,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:17,351 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) [2024-09-17 18:59:17,352 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:59:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:17,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-17 18:59:17,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-17 18:59:17,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:59:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-17 18:59:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777939375] [2024-09-17 18:59:18,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:59:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990537116] [2024-09-17 18:59:18,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990537116] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:59:18,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:59:18,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-17 18:59:18,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594024145] [2024-09-17 18:59:18,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:59:18,181 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:59:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:59:18,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:59:18,182 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-17 18:59:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:18,587 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-17 18:59:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:59:18,587 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-17 18:59:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:18,588 INFO L225 Difference]: With dead ends: 145 [2024-09-17 18:59:18,588 INFO L226 Difference]: Without dead ends: 111 [2024-09-17 18:59:18,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:59:18,589 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:18,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 414 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:59:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-17 18:59:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-17 18:59:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-17 18:59:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-17 18:59:18,610 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-17 18:59:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:18,611 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-17 18:59:18,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-17 18:59:18,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-17 18:59:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-17 18:59:18,612 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:18,612 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:18,626 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:59:18,812 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:18,813 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:18,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:18,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-17 18:59:18,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:18,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283467221] [2024-09-17 18:59:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:18,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:59:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:59:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:59:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:59:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:59:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:59:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:59:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:59:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:59:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:59:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:59:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:59:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:18,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:59:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:59:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-17 18:59:19,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283467221] [2024-09-17 18:59:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283467221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:59:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972101446] [2024-09-17 18:59:19,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:59:19,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:19,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:19,005 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) [2024-09-17 18:59:19,006 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:59:19,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:59:19,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:59:19,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:59:19,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-17 18:59:19,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:59:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-17 18:59:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972101446] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:59:19,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:59:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-17 18:59:19,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149503110] [2024-09-17 18:59:19,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:59:19,138 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:59:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:59:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:59:19,139 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-17 18:59:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:19,188 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-17 18:59:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 18:59:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-17 18:59:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:19,189 INFO L225 Difference]: With dead ends: 124 [2024-09-17 18:59:19,191 INFO L226 Difference]: Without dead ends: 102 [2024-09-17 18:59:19,191 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:59:19,192 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:19,192 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:59:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-17 18:59:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-17 18:59:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-17 18:59:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-17 18:59:19,217 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-17 18:59:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:19,218 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-17 18:59:19,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-17 18:59:19,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-17 18:59:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-17 18:59:19,221 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:19,221 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:19,236 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 18:59:19,421 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 18:59:19,422 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:19,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-17 18:59:19,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:19,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685493679] [2024-09-17 18:59:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:19,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:59:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:59:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:59:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:59:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:59:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:59:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:59:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:59:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:59:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:59:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:59:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:59:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:59:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:59:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:59:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-17 18:59:19,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:19,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685493679] [2024-09-17 18:59:19,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685493679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:59:19,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523252898] [2024-09-17 18:59:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:19,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:19,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:19,716 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) [2024-09-17 18:59:19,717 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:59:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:19,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-17 18:59:19,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-17 18:59:19,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:59:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-17 18:59:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523252898] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:59:20,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:59:20,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-17 18:59:20,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461855721] [2024-09-17 18:59:20,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:59:20,271 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:59:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:59:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:59:20,272 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-17 18:59:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:20,483 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-17 18:59:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 18:59:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-17 18:59:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:20,484 INFO L225 Difference]: With dead ends: 117 [2024-09-17 18:59:20,484 INFO L226 Difference]: Without dead ends: 100 [2024-09-17 18:59:20,484 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:59:20,485 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:20,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:59:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-17 18:59:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-17 18:59:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-17 18:59:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-17 18:59:20,503 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-17 18:59:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:20,504 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-17 18:59:20,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-17 18:59:20,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-17 18:59:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-17 18:59:20,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:20,505 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-17 18:59:20,517 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:59:20,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:20,709 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:20,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-17 18:59:20,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:20,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643254322] [2024-09-17 18:59:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:20,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:59:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:59:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:59:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:59:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:59:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:59:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:59:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:59:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:59:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:59:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:59:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:59:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:59:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:59:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:59:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:59:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-17 18:59:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:59:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643254322] [2024-09-17 18:59:20,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643254322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:59:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284123088] [2024-09-17 18:59:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:20,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:20,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:20,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:59:20,796 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:59:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:59:20,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-17 18:59:20,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-17 18:59:20,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:59:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284123088] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:59:20,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:59:20,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-17 18:59:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680665706] [2024-09-17 18:59:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:59:20,893 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:59:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:59:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:59:20,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:59:20,895 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-17 18:59:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:59:20,944 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-17 18:59:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:59:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-17 18:59:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:59:20,946 INFO L225 Difference]: With dead ends: 100 [2024-09-17 18:59:20,946 INFO L226 Difference]: Without dead ends: 88 [2024-09-17 18:59:20,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:59:20,947 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:59:20,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:59:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-17 18:59:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-17 18:59:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:59:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-17 18:59:20,967 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-17 18:59:20,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:59:20,967 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-17 18:59:20,968 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-17 18:59:20,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-17 18:59:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:59:20,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:59:20,969 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:59:20,981 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:59:21,169 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:21,170 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:59:21,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:59:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-17 18:59:21,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:59:21,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451963901] [2024-09-17 18:59:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:59:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:59:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:59:21,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410937580] [2024-09-17 18:59:21,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:59:21,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:59:21,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:59:21,210 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:59:21,213 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:59:21,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:59:21,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:59:21,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-17 18:59:21,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:59:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 78 proven. 44 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-09-17 18:59:21,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:59:34,684 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-17 19:00:00,552 WARN L293 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 19:01:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 61 proven. 25 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-17 19:01:07,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:01:07,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451963901] [2024-09-17 19:01:07,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:01:07,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410937580] [2024-09-17 19:01:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410937580] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:01:07,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:01:07,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2024-09-17 19:01:07,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048363715] [2024-09-17 19:01:07,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:01:07,980 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 19:01:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:01:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 19:01:07,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:01:07,980 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 20 states have internal predecessors, (50), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2024-09-17 19:01:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:01:34,637 INFO L93 Difference]: Finished difference Result 179 states and 239 transitions. [2024-09-17 19:01:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-17 19:01:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 20 states have internal predecessors, (50), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) Word has length 104 [2024-09-17 19:01:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:01:34,643 INFO L225 Difference]: With dead ends: 179 [2024-09-17 19:01:34,643 INFO L226 Difference]: Without dead ends: 157 [2024-09-17 19:01:34,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 19:01:34,651 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 74 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-17 19:01:34,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 550 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-17 19:01:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-17 19:01:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2024-09-17 19:01:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 87 states have internal predecessors, (95), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2024-09-17 19:01:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2024-09-17 19:01:34,697 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 104 [2024-09-17 19:01:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:01:34,697 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2024-09-17 19:01:34,697 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 20 states have internal predecessors, (50), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2024-09-17 19:01:34,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2024-09-17 19:01:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-17 19:01:34,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:01:34,699 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-17 19:01:34,705 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 19:01:34,899 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-17 19:01:34,900 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:01:34,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1973122394, now seen corresponding path program 2 times [2024-09-17 19:01:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:01:34,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359878690] [2024-09-17 19:01:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:01:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:01:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:01:34,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639987005] [2024-09-17 19:01:34,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:01:34,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:01:34,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:01:34,931 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:01:34,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 19:01:34,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:01:34,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:01:34,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-17 19:01:34,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:01:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-09-17 19:01:35,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:01:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-17 19:01:35,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:01:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359878690] [2024-09-17 19:01:35,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:01:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639987005] [2024-09-17 19:01:35,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639987005] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:01:35,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:01:35,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-09-17 19:01:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080666170] [2024-09-17 19:01:35,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:01:35,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-17 19:01:35,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:01:35,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-17 19:01:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-17 19:01:35,276 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 19:01:36,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-17 19:01:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:01:36,949 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2024-09-17 19:01:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:01:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 115 [2024-09-17 19:01:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:01:36,951 INFO L225 Difference]: With dead ends: 156 [2024-09-17 19:01:36,951 INFO L226 Difference]: Without dead ends: 154 [2024-09-17 19:01:36,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-17 19:01:36,951 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:01:36,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 266 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 19:01:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-09-17 19:01:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-09-17 19:01:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 92 states have (on average 1.141304347826087) internal successors, (105), 98 states have internal predecessors, (105), 44 states have call successors, (44), 18 states have call predecessors, (44), 17 states have return successors, (42), 37 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-17 19:01:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2024-09-17 19:01:37,004 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 115 [2024-09-17 19:01:37,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:01:37,004 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2024-09-17 19:01:37,004 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 19:01:37,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2024-09-17 19:01:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-17 19:01:37,007 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:01:37,007 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:01:37,019 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 19:01:37,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 19:01:37,207 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:01:37,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1536141598, now seen corresponding path program 4 times [2024-09-17 19:01:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:01:37,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425734897] [2024-09-17 19:01:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:01:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:01:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:01:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:01:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:01:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:01:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:01:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 19:01:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 19:01:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 19:01:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 19:01:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 19:01:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 19:01:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 19:01:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 19:01:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 19:01:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 19:01:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 19:01:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-17 19:01:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-17 19:01:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-17 19:01:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-17 19:01:37,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:01:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425734897] [2024-09-17 19:01:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425734897] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:01:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242601499] [2024-09-17 19:01:37,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:01:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:01:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:01:37,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:01:37,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 19:01:37,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:01:37,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:01:37,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 19:01:37,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:01:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-17 19:01:37,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:01:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-17 19:01:37,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242601499] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:01:37,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:01:37,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-17 19:01:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662272863] [2024-09-17 19:01:37,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:01:37,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 19:01:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:01:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 19:01:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 19:01:37,649 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-17 19:01:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:01:37,758 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2024-09-17 19:01:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:01:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 117 [2024-09-17 19:01:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:01:37,760 INFO L225 Difference]: With dead ends: 184 [2024-09-17 19:01:37,760 INFO L226 Difference]: Without dead ends: 144 [2024-09-17 19:01:37,760 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 19:01:37,762 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:01:37,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:01:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-17 19:01:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2024-09-17 19:01:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 90 states have internal predecessors, (94), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-17 19:01:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2024-09-17 19:01:37,805 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 117 [2024-09-17 19:01:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:01:37,805 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2024-09-17 19:01:37,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-17 19:01:37,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2024-09-17 19:01:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 19:01:37,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:01:37,806 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-17 19:01:37,822 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-17 19:01:38,010 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 19:01:38,011 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:01:38,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash 47128766, now seen corresponding path program 2 times [2024-09-17 19:01:38,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:01:38,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38736219] [2024-09-17 19:01:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:01:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:01:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:01:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:01:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:01:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:01:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:01:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 19:01:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 19:01:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 19:01:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 19:01:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 19:01:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 19:01:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 19:01:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 19:01:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 19:01:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 19:01:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 19:01:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-17 19:01:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-17 19:01:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-17 19:01:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-17 19:01:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:01:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-17 19:01:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:01:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38736219] [2024-09-17 19:01:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38736219] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:01:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886297555] [2024-09-17 19:01:38,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:01:38,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:01:38,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:01:38,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:01:38,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 19:01:38,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:01:38,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:01:38,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-17 19:01:38,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:01:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-17 19:01:38,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:01:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-17 19:01:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886297555] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:01:39,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:01:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-09-17 19:01:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033355672] [2024-09-17 19:01:39,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:01:39,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:01:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:01:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:01:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:01:39,677 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-17 19:01:40,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:01:40,298 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-17 19:01:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:01:40,298 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-17 19:01:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:01:40,299 INFO L225 Difference]: With dead ends: 158 [2024-09-17 19:01:40,299 INFO L226 Difference]: Without dead ends: 130 [2024-09-17 19:01:40,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 19:01:40,300 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:01:40,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 564 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 19:01:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-17 19:01:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-09-17 19:01:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 19:01:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2024-09-17 19:01:40,332 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 120 [2024-09-17 19:01:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:01:40,332 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2024-09-17 19:01:40,332 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-17 19:01:40,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2024-09-17 19:01:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-17 19:01:40,333 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:01:40,334 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:01:40,346 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-17 19:01:40,534 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 19:01:40,535 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:01:40,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:01:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1414642200, now seen corresponding path program 5 times [2024-09-17 19:01:40,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:01:40,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777894842] [2024-09-17 19:01:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:01:40,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:01:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:01:40,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439304022] [2024-09-17 19:01:40,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:01:40,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:01:40,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:01:40,600 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:01:40,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 19:01:40,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-17 19:01:40,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:01:40,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-17 19:01:40,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:01:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-17 19:01:41,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:03:15,136 WARN L293 SmtUtils]: Spent 8.50s on a formula simplification that was a NOOP. DAG size: 255 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)