./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 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/egcd3-ll_valuebound5.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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 09:16:06,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:16:06,935 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:16:06,940 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:16:06,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:16:06,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:16:06,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:16:06,965 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:16:06,965 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:16:06,965 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:16:06,966 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:16:06,966 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:16:06,966 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:16:06,967 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:16:06,967 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:16:06,967 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:16:06,968 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:16:06,968 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:16:06,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:16:06,968 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:16:06,969 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:16:06,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:16:06,972 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:16:06,972 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:16:06,972 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:16:06,972 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:16:06,973 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:16:06,973 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:16:06,973 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:16:06,973 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:16:06,973 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:16:06,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:16:06,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:16:06,974 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:16:06,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:16:06,975 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:16:06,975 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:16:06,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:16:06,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:16:06,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:16:06,976 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:16:06,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:16:06,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:16:07,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:16:07,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:16:07,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:16:07,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:16:07,257 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:16:07,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-09-13 09:16:08,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:16:08,699 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:16:08,700 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-09-13 09:16:08,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1c5c59b16/b242ae2bc39b46a7b15dfb2932dcbd0f/FLAG0af69d15f [2024-09-13 09:16:09,058 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1c5c59b16/b242ae2bc39b46a7b15dfb2932dcbd0f [2024-09-13 09:16:09,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:16:09,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:16:09,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:16:09,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:16:09,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:16:09,074 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7259bc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09, skipping insertion in model container [2024-09-13 09:16:09,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,091 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:16:09,212 WARN L247 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/egcd3-ll_valuebound5.c[490,503] [2024-09-13 09:16:09,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:16:09,243 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:16:09,254 WARN L247 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/egcd3-ll_valuebound5.c[490,503] [2024-09-13 09:16:09,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:16:09,279 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:16:09,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09 WrapperNode [2024-09-13 09:16:09,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:16:09,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:16:09,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:16:09,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:16:09,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,296 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:16:09,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:16:09,296 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:16:09,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:16:09,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:16:09,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,309 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,324 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]. [2024-09-13 09:16:09,324 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,324 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,326 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,330 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,331 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,334 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,335 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:16:09,335 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:16:09,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:16:09,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:16:09,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (1/1) ... [2024-09-13 09:16:09,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:16:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:09,376 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) [2024-09-13 09:16:09,383 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 [2024-09-13 09:16:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:16:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 09:16:09,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 09:16:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:16:09,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:16:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:16:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:16:09,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:16:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:16:09,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:16:09,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:16:09,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:16:09,526 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:16:09,529 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:16:09,697 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-13 09:16:09,698 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:16:09,726 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:16:09,726 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-13 09:16:09,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:16:09 BoogieIcfgContainer [2024-09-13 09:16:09,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:16:09,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:16:09,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:16:09,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:16:09,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:16:09" (1/3) ... [2024-09-13 09:16:09,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea6045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:16:09, skipping insertion in model container [2024-09-13 09:16:09,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:16:09" (2/3) ... [2024-09-13 09:16:09,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea6045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:16:09, skipping insertion in model container [2024-09-13 09:16:09,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:16:09" (3/3) ... [2024-09-13 09:16:09,738 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2024-09-13 09:16:09,755 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:16:09,755 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:16:09,856 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:16:09,865 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;@2d619fa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:16:09,868 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:16:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 09:16:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 09:16:09,879 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:09,880 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:09,881 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:09,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-13 09:16:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230443194] [2024-09-13 09:16:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:10,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:10,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230443194] [2024-09-13 09:16:10,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230443194] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:10,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:10,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 09:16:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320621371] [2024-09-13 09:16:10,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:10,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 09:16:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 09:16:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:16:10,119 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:16:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:10,142 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-13 09:16:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 09:16:10,144 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-13 09:16:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:10,149 INFO L225 Difference]: With dead ends: 70 [2024-09-13 09:16:10,150 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 09:16:10,152 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 09:16:10,154 INFO L434 NwaCegarLoop]: 45 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, 45 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 [2024-09-13 09:16:10,155 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 09:16:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 09:16:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 09:16:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-13 09:16:10,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-13 09:16:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:10,184 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-13 09:16:10,185 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:16:10,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-13 09:16:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 09:16:10,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:10,187 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:10,187 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:16:10,187 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-13 09:16:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:10,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148832935] [2024-09-13 09:16:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:10,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148832935] [2024-09-13 09:16:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148832935] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:10,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:10,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 09:16:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468216535] [2024-09-13 09:16:10,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:10,380 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 09:16:10,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 09:16:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:10,381 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:16:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:10,462 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-13 09:16:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:16:10,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-13 09:16:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:10,464 INFO L225 Difference]: With dead ends: 53 [2024-09-13 09:16:10,464 INFO L226 Difference]: Without dead ends: 46 [2024-09-13 09:16:10,465 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:10,465 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:10,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-13 09:16:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-13 09:16:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 09:16:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-13 09:16:10,486 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-13 09:16:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:10,486 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-13 09:16:10,486 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:16:10,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-13 09:16:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 09:16:10,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:10,490 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:10,490 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 09:16:10,491 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:10,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-13 09:16:10,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:10,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513854126] [2024-09-13 09:16:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:10,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:10,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029621827] [2024-09-13 09:16:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:10,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:10,531 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) [2024-09-13 09:16:10,533 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:16:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:10,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:16:10,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:10,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:16:10,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513854126] [2024-09-13 09:16:10,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029621827] [2024-09-13 09:16:10,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029621827] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:10,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:10,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:10,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99325863] [2024-09-13 09:16:10,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:10,726 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:10,727 INFO L87 Difference]: Start difference. First operand 36 states and 45 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:16:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:10,774 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-13 09:16:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:10,775 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-13 09:16:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:10,776 INFO L225 Difference]: With dead ends: 52 [2024-09-13 09:16:10,776 INFO L226 Difference]: Without dead ends: 50 [2024-09-13 09:16:10,777 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:10,777 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:10,778 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-13 09:16:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-13 09:16:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-13 09:16:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-13 09:16:10,796 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-13 09:16:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:10,796 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-13 09:16:10,797 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-13 09:16:10,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-13 09:16:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 09:16:10,798 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:10,798 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:10,812 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:11,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:11,004 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:11,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-13 09:16:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:11,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902717245] [2024-09-13 09:16:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:11,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:11,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:11,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902717245] [2024-09-13 09:16:11,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902717245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:11,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703101276] [2024-09-13 09:16:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:11,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:11,183 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) [2024-09-13 09:16:11,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:16:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:16:11,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:11,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:11,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703101276] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:11,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:11,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 09:16:11,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852963851] [2024-09-13 09:16:11,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:11,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 09:16:11,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:11,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 09:16:11,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 09:16:11,351 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:16:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:11,479 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-13 09:16:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:16:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-13 09:16:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:11,481 INFO L225 Difference]: With dead ends: 102 [2024-09-13 09:16:11,482 INFO L226 Difference]: Without dead ends: 95 [2024-09-13 09:16:11,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:16:11,483 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:11,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-13 09:16:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-13 09:16:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 09:16:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-13 09:16:11,497 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-13 09:16:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:11,498 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-13 09:16:11,498 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:16:11,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-13 09:16:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 09:16:11,499 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:11,499 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:11,511 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 09:16:11,703 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:11,704 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:11,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-13 09:16:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718708338] [2024-09-13 09:16:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:11,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553626188] [2024-09-13 09:16:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:11,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:11,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:11,720 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) [2024-09-13 09:16:11,721 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:16:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:11,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 09:16:11,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:11,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:16:11,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:11,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718708338] [2024-09-13 09:16:11,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:11,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553626188] [2024-09-13 09:16:11,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553626188] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:11,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:11,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580415177] [2024-09-13 09:16:11,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:11,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:11,806 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2024-09-13 09:16:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:11,851 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-13 09:16:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:11,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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 41 [2024-09-13 09:16:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:11,854 INFO L225 Difference]: With dead ends: 78 [2024-09-13 09:16:11,855 INFO L226 Difference]: Without dead ends: 76 [2024-09-13 09:16:11,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:11,856 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:11,856 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-13 09:16:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-13 09:16:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 09:16:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-13 09:16:11,876 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-13 09:16:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:11,877 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-13 09:16:11,879 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2024-09-13 09:16:11,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-13 09:16:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 09:16:11,880 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:11,880 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-09-13 09:16:11,893 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:12,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:12,084 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:12,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-13 09:16:12,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:12,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186856502] [2024-09-13 09:16:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:12,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:12,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872744101] [2024-09-13 09:16:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:12,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:12,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:12,097 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) [2024-09-13 09:16:12,098 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:16:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:12,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 09:16:12,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 09:16:12,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:12,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186856502] [2024-09-13 09:16:12,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872744101] [2024-09-13 09:16:12,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872744101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:12,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:12,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-13 09:16:12,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869611298] [2024-09-13 09:16:12,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:12,850 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 09:16:12,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 09:16:12,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-13 09:16:12,851 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:13,995 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-13 09:16:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 09:16:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-13 09:16:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:13,996 INFO L225 Difference]: With dead ends: 132 [2024-09-13 09:16:13,997 INFO L226 Difference]: Without dead ends: 130 [2024-09-13 09:16:13,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-13 09:16:13,997 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:13,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 09:16:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-13 09:16:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-13 09:16:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-13 09:16:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-13 09:16:14,021 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-13 09:16:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:14,022 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-13 09:16:14,022 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:14,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-13 09:16:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 09:16:14,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:14,023 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:14,036 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:16:14,223 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:14,224 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:14,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-13 09:16:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:14,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063918135] [2024-09-13 09:16:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:14,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101773944] [2024-09-13 09:16:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:14,239 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) [2024-09-13 09:16:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:16:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:14,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:16:14,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:16:14,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:16:14,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:14,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063918135] [2024-09-13 09:16:14,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:14,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101773944] [2024-09-13 09:16:14,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101773944] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:14,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:14,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:14,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931922171] [2024-09-13 09:16:14,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:14,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:14,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:14,307 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:14,373 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-13 09:16:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-13 09:16:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:14,375 INFO L225 Difference]: With dead ends: 155 [2024-09-13 09:16:14,375 INFO L226 Difference]: Without dead ends: 153 [2024-09-13 09:16:14,376 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:14,376 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:14,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-13 09:16:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-13 09:16:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-13 09:16:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-13 09:16:14,419 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-13 09:16:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:14,419 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-13 09:16:14,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 09:16:14,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-13 09:16:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 09:16:14,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:14,420 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:14,433 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:14,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 09:16:14,623 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:14,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-13 09:16:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:14,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331705095] [2024-09-13 09:16:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:14,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138746470] [2024-09-13 09:16:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:14,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:14,640 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) [2024-09-13 09:16:14,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:16:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:14,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 09:16:14,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:14,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:14,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331705095] [2024-09-13 09:16:14,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138746470] [2024-09-13 09:16:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138746470] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:14,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-13 09:16:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573184449] [2024-09-13 09:16:14,833 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:14,834 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 09:16:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 09:16:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:16:14,834 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2024-09-13 09:16:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:14,992 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-13 09:16:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:16:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 46 [2024-09-13 09:16:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:14,994 INFO L225 Difference]: With dead ends: 174 [2024-09-13 09:16:14,994 INFO L226 Difference]: Without dead ends: 172 [2024-09-13 09:16:14,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:16:14,995 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:14,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:16:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-13 09:16:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-13 09:16:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-13 09:16:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-13 09:16:15,030 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-13 09:16:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:15,030 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-13 09:16:15,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2024-09-13 09:16:15,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-13 09:16:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 09:16:15,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:15,031 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2024-09-13 09:16:15,046 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 09:16:15,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:15,233 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:15,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-13 09:16:15,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:15,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693017495] [2024-09-13 09:16:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:15,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:15,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159417430] [2024-09-13 09:16:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:15,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:15,248 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) [2024-09-13 09:16:15,249 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:16:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:16:15,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 09:16:15,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:16:15,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:15,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693017495] [2024-09-13 09:16:15,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:15,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159417430] [2024-09-13 09:16:15,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159417430] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:15,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:15,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754871151] [2024-09-13 09:16:15,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:15,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:15,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:15,319 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 09:16:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:15,413 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-13 09:16:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-13 09:16:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:15,416 INFO L225 Difference]: With dead ends: 254 [2024-09-13 09:16:15,416 INFO L226 Difference]: Without dead ends: 252 [2024-09-13 09:16:15,417 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:15,417 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:15,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-13 09:16:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-13 09:16:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-13 09:16:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-13 09:16:15,471 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-13 09:16:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:15,471 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-13 09:16:15,472 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 09:16:15,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,472 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-13 09:16:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 09:16:15,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:15,472 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:15,485 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 09:16:15,673 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:15,674 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:15,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-13 09:16:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:15,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499304906] [2024-09-13 09:16:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:15,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:16:15,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:15,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499304906] [2024-09-13 09:16:15,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499304906] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:15,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:15,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011239350] [2024-09-13 09:16:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:15,745 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:15,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:15,746 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-09-13 09:16:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:15,855 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-13 09:16:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:16:15,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 51 [2024-09-13 09:16:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:15,858 INFO L225 Difference]: With dead ends: 291 [2024-09-13 09:16:15,858 INFO L226 Difference]: Without dead ends: 177 [2024-09-13 09:16:15,860 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:16:15,860 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:15,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-13 09:16:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-13 09:16:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-13 09:16:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-13 09:16:15,899 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-13 09:16:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:15,899 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-13 09:16:15,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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) [2024-09-13 09:16:15,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-13 09:16:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 09:16:15,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:15,900 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:15,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-13 09:16:15,901 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:15,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-13 09:16:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:15,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313354093] [2024-09-13 09:16:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:15,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843078430] [2024-09-13 09:16:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:15,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:15,920 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) [2024-09-13 09:16:15,920 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:16:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:15,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 09:16:15,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-13 09:16:16,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-13 09:16:17,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:17,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313354093] [2024-09-13 09:16:17,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:17,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843078430] [2024-09-13 09:16:17,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843078430] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:17,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:17,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-13 09:16:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819948738] [2024-09-13 09:16:17,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:17,967 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 09:16:17,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 09:16:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-13 09:16:17,968 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-13 09:16:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:22,099 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-13 09:16:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 09:16:22,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-09-13 09:16:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:22,102 INFO L225 Difference]: With dead ends: 393 [2024-09-13 09:16:22,103 INFO L226 Difference]: Without dead ends: 385 [2024-09-13 09:16:22,104 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:16:22,104 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:22,104 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-13 09:16:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-13 09:16:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-13 09:16:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-09-13 09:16:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-13 09:16:22,189 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-13 09:16:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:22,189 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-13 09:16:22,190 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-13 09:16:22,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-13 09:16:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 09:16:22,191 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:22,191 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:22,203 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:22,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:22,394 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:22,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-13 09:16:22,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:22,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210929401] [2024-09-13 09:16:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:16:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-13 09:16:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 09:16:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 09:16:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:22,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210929401] [2024-09-13 09:16:22,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210929401] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:16:22,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:16:22,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:16:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332202898] [2024-09-13 09:16:22,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:22,507 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:22,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:16:22,508 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 09:16:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:22,632 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-13 09:16:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:22,632 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), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-13 09:16:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:22,636 INFO L225 Difference]: With dead ends: 399 [2024-09-13 09:16:22,636 INFO L226 Difference]: Without dead ends: 243 [2024-09-13 09:16:22,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:16:22,637 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:22,638 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-13 09:16:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-13 09:16:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 09:16:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-13 09:16:22,732 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-13 09:16:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:22,732 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-13 09:16:22,732 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), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 09:16:22,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-13 09:16:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-13 09:16:22,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:22,733 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2024-09-13 09:16:22,734 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 09:16:22,734 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:22,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-13 09:16:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094017247] [2024-09-13 09:16:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:22,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395696564] [2024-09-13 09:16:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:22,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:22,754 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) [2024-09-13 09:16:22,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:16:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:22,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 09:16:22,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-13 09:16:22,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-13 09:16:22,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094017247] [2024-09-13 09:16:22,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395696564] [2024-09-13 09:16:22,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395696564] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:22,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:16:22,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-13 09:16:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845790374] [2024-09-13 09:16:22,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:16:22,902 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:16:22,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:16:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 09:16:22,903 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 09:16:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:23,014 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-13 09:16:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:16:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-13 09:16:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:23,016 INFO L225 Difference]: With dead ends: 234 [2024-09-13 09:16:23,016 INFO L226 Difference]: Without dead ends: 232 [2024-09-13 09:16:23,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:16:23,016 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:23,017 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:16:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-13 09:16:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-13 09:16:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 09:16:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-13 09:16:23,112 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-13 09:16:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:23,112 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-13 09:16:23,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 09:16:23,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-13 09:16:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 09:16:23,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:23,113 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:23,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 09:16:23,317 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 [2024-09-13 09:16:23,317 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:23,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-13 09:16:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:23,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238457514] [2024-09-13 09:16:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:23,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:23,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316995098] [2024-09-13 09:16:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:23,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:23,334 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) [2024-09-13 09:16:23,335 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 09:16:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:23,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-13 09:16:23,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 09:16:23,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 09:16:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238457514] [2024-09-13 09:16:24,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316995098] [2024-09-13 09:16:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316995098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:24,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:24,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-13 09:16:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168795519] [2024-09-13 09:16:24,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:24,720 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 09:16:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 09:16:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-13 09:16:24,724 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:16:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:29,976 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-09-13 09:16:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 09:16:29,977 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-09-13 09:16:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:29,979 INFO L225 Difference]: With dead ends: 350 [2024-09-13 09:16:29,979 INFO L226 Difference]: Without dead ends: 348 [2024-09-13 09:16:29,980 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 09:16:29,980 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:29,981 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 444 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-13 09:16:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-13 09:16:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-09-13 09:16:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-09-13 09:16:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-09-13 09:16:30,170 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-09-13 09:16:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:30,170 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-09-13 09:16:30,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:16:30,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-09-13 09:16:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 09:16:30,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:30,171 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:30,188 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 09:16:30,375 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 [2024-09-13 09:16:30,376 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:30,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-13 09:16:30,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:30,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80370577] [2024-09-13 09:16:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:30,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:30,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503238343] [2024-09-13 09:16:30,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:30,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:30,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:30,390 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) [2024-09-13 09:16:30,393 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 09:16:30,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:30,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:30,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 09:16:30,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-13 09:16:30,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-13 09:16:30,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:30,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80370577] [2024-09-13 09:16:30,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:30,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503238343] [2024-09-13 09:16:30,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503238343] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:30,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:30,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-13 09:16:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765844205] [2024-09-13 09:16:30,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:30,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 09:16:30,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 09:16:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:16:30,759 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 09:16:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:31,590 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-09-13 09:16:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 09:16:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-09-13 09:16:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:31,593 INFO L225 Difference]: With dead ends: 426 [2024-09-13 09:16:31,593 INFO L226 Difference]: Without dead ends: 424 [2024-09-13 09:16:31,594 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-13 09:16:31,594 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:31,594 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 09:16:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-09-13 09:16:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-09-13 09:16:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-09-13 09:16:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-09-13 09:16:31,801 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-09-13 09:16:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:31,802 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-09-13 09:16:31,802 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 09:16:31,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-09-13 09:16:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-13 09:16:31,803 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:31,803 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1] [2024-09-13 09:16:31,809 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:32,003 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 [2024-09-13 09:16:32,004 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:32,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-13 09:16:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:32,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926256331] [2024-09-13 09:16:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:32,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116359230] [2024-09-13 09:16:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:32,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:32,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:32,016 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) [2024-09-13 09:16:32,016 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 09:16:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:32,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 09:16:32,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-13 09:16:32,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-13 09:16:35,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926256331] [2024-09-13 09:16:35,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:35,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116359230] [2024-09-13 09:16:35,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116359230] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:35,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:35,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-13 09:16:35,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275496975] [2024-09-13 09:16:35,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:35,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 09:16:35,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:35,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 09:16:35,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-13 09:16:35,341 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-13 09:16:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:41,690 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-09-13 09:16:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-13 09:16:41,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-09-13 09:16:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:41,694 INFO L225 Difference]: With dead ends: 544 [2024-09-13 09:16:41,694 INFO L226 Difference]: Without dead ends: 540 [2024-09-13 09:16:41,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 09:16:41,695 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 204 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:41,695 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 683 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-13 09:16:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-13 09:16:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-09-13 09:16:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-13 09:16:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-09-13 09:16:42,014 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-09-13 09:16:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:42,015 INFO L474 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-09-13 09:16:42,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-13 09:16:42,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-09-13 09:16:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-13 09:16:42,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:42,016 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:42,029 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 09:16:42,220 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 [2024-09-13 09:16:42,221 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:42,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-13 09:16:42,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:42,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245745679] [2024-09-13 09:16:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:42,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:42,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233884254] [2024-09-13 09:16:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:42,245 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) [2024-09-13 09:16:42,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 09:16:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:42,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 09:16:42,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-13 09:16:42,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-13 09:16:42,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245745679] [2024-09-13 09:16:42,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233884254] [2024-09-13 09:16:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233884254] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:42,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:42,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-13 09:16:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115880512] [2024-09-13 09:16:42,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:42,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 09:16:42,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 09:16:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:16:42,816 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 09:16:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:44,702 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-09-13 09:16:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 09:16:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-09-13 09:16:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:44,708 INFO L225 Difference]: With dead ends: 1227 [2024-09-13 09:16:44,708 INFO L226 Difference]: Without dead ends: 1225 [2024-09-13 09:16:44,709 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 09:16:44,709 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 141 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:44,709 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 09:16:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-13 09:16:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-09-13 09:16:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-13 09:16:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-09-13 09:16:45,606 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-09-13 09:16:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:45,606 INFO L474 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-09-13 09:16:45,606 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 09:16:45,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-09-13 09:16:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-13 09:16:45,609 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:45,609 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:45,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 09:16:45,811 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:45,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-13 09:16:45,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:45,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356090728] [2024-09-13 09:16:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:45,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575030737] [2024-09-13 09:16:45,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:16:45,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:45,835 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:45,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 09:16:45,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 09:16:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:45,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 09:16:45,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-13 09:16:46,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-13 09:16:46,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356090728] [2024-09-13 09:16:46,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575030737] [2024-09-13 09:16:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575030737] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:46,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:46,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-13 09:16:46,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757132816] [2024-09-13 09:16:46,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:46,533 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 09:16:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 09:16:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:16:46,533 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-13 09:16:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:48,938 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-09-13 09:16:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 09:16:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-09-13 09:16:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:48,946 INFO L225 Difference]: With dead ends: 1373 [2024-09-13 09:16:48,946 INFO L226 Difference]: Without dead ends: 1369 [2024-09-13 09:16:48,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:16:48,947 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 81 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:48,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 392 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 09:16:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-09-13 09:16:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-09-13 09:16:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-13 09:16:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-09-13 09:16:50,121 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-09-13 09:16:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:50,122 INFO L474 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-09-13 09:16:50,122 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-13 09:16:50,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-09-13 09:16:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-13 09:16:50,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:50,124 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 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] [2024-09-13 09:16:50,131 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-13 09:16:50,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 09:16:50,329 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:50,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-13 09:16:50,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:50,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190240805] [2024-09-13 09:16:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:16:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:16:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:16:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:16:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:16:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:16:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:16:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:16:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 09:16:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 09:16:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-13 09:16:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-13 09:16:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-13 09:16:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:16:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-13 09:16:50,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:50,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190240805] [2024-09-13 09:16:50,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190240805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:16:50,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249230805] [2024-09-13 09:16:50,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:50,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:50,548 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:50,549 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 09:16:50,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:50,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 09:16:50,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-13 09:16:50,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-13 09:16:50,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249230805] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:50,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:16:50,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-13 09:16:50,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719875497] [2024-09-13 09:16:50,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:50,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 09:16:50,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 09:16:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:16:50,776 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 09:16:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:16:52,364 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-09-13 09:16:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 09:16:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-09-13 09:16:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:16:52,370 INFO L225 Difference]: With dead ends: 1291 [2024-09-13 09:16:52,370 INFO L226 Difference]: Without dead ends: 1286 [2024-09-13 09:16:52,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-13 09:16:52,371 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:16:52,371 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:16:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-13 09:16:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-09-13 09:16:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-13 09:16:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-09-13 09:16:53,424 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-09-13 09:16:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:16:53,424 INFO L474 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-09-13 09:16:53,425 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-13 09:16:53,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-09-13 09:16:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-13 09:16:53,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:16:53,428 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:16:53,434 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 09:16:53,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:53,629 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:16:53,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:16:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-13 09:16:53,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:16:53,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92314246] [2024-09-13 09:16:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:16:53,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:16:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:16:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959149787] [2024-09-13 09:16:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:16:53,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:16:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:16:53,644 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:16:53,647 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 09:16:53,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:16:53,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:16:53,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-13 09:16:53,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:16:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-13 09:16:54,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:16:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-13 09:16:58,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:16:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92314246] [2024-09-13 09:16:58,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:16:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959149787] [2024-09-13 09:16:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959149787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:16:58,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:16:58,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2024-09-13 09:16:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750366194] [2024-09-13 09:16:58,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:16:58,754 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-13 09:16:58,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:16:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-13 09:16:58,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 09:16:58,755 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-13 09:17:05,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:17:30,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:17:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:17:34,073 INFO L93 Difference]: Finished difference Result 1643 states and 2666 transitions. [2024-09-13 09:17:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-13 09:17:34,073 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 112 [2024-09-13 09:17:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:17:34,080 INFO L225 Difference]: With dead ends: 1643 [2024-09-13 09:17:34,080 INFO L226 Difference]: Without dead ends: 1244 [2024-09-13 09:17:34,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=1625, Invalid=8077, Unknown=0, NotChecked=0, Total=9702 [2024-09-13 09:17:34,085 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 298 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 266 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:17:34,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 978 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1351 Invalid, 1 Unknown, 0 Unchecked, 11.7s Time] [2024-09-13 09:17:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2024-09-13 09:17:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1002. [2024-09-13 09:17:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 495 states have (on average 1.298989898989899) internal successors, (643), 495 states have internal predecessors, (643), 479 states have call successors, (479), 29 states have call predecessors, (479), 27 states have return successors, (477), 477 states have call predecessors, (477), 477 states have call successors, (477) [2024-09-13 09:17:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1599 transitions. [2024-09-13 09:17:35,316 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1599 transitions. Word has length 112 [2024-09-13 09:17:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:17:35,316 INFO L474 AbstractCegarLoop]: Abstraction has 1002 states and 1599 transitions. [2024-09-13 09:17:35,316 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-13 09:17:35,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:17:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1599 transitions. [2024-09-13 09:17:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-13 09:17:35,318 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:17:35,318 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2024-09-13 09:17:35,331 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-13 09:17:35,518 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:17:35,519 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:17:35,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:17:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-13 09:17:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:17:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183071425] [2024-09-13 09:17:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:17:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:17:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:17:35,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462062703] [2024-09-13 09:17:35,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:17:35,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:17:35,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:17:35,542 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:17:35,544 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 09:17:35,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 09:17:35,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:17:35,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-13 09:17:35,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:17:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-13 09:17:36,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:17:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-13 09:17:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:17:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183071425] [2024-09-13 09:17:39,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:17:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462062703] [2024-09-13 09:17:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462062703] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:17:39,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:17:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-13 09:17:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405757637] [2024-09-13 09:17:39,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:17:39,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 09:17:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:17:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 09:17:39,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-09-13 09:17:39,679 INFO L87 Difference]: Start difference. First operand 1002 states and 1599 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-13 09:17:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:17:55,373 INFO L93 Difference]: Finished difference Result 1406 states and 2243 transitions. [2024-09-13 09:17:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-13 09:17:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-09-13 09:17:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:17:55,380 INFO L225 Difference]: With dead ends: 1406 [2024-09-13 09:17:55,380 INFO L226 Difference]: Without dead ends: 1400 [2024-09-13 09:17:55,382 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1592, Invalid=7914, Unknown=0, NotChecked=0, Total=9506 [2024-09-13 09:17:55,383 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 321 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:17:55,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 850 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-13 09:17:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2024-09-13 09:17:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1181. [2024-09-13 09:17:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 588 states have (on average 1.2976190476190477) internal successors, (763), 588 states have internal predecessors, (763), 563 states have call successors, (563), 31 states have call predecessors, (563), 29 states have return successors, (561), 561 states have call predecessors, (561), 561 states have call successors, (561) [2024-09-13 09:17:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1887 transitions. [2024-09-13 09:17:57,209 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1887 transitions. Word has length 115 [2024-09-13 09:17:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:17:57,211 INFO L474 AbstractCegarLoop]: Abstraction has 1181 states and 1887 transitions. [2024-09-13 09:17:57,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-13 09:17:57,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:17:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1887 transitions. [2024-09-13 09:17:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-13 09:17:57,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:17:57,213 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2024-09-13 09:17:57,227 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 09:17:57,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:17:57,417 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:17:57,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:17:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-13 09:17:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:17:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046925659] [2024-09-13 09:17:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:17:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:17:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:17:57,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303180425] [2024-09-13 09:17:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:17:57,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:17:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:17:57,432 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:17:57,432 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 09:17:57,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:17:57,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:17:57,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-13 09:17:57,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:17:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-13 09:17:58,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:18:04,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:18:04,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046925659] [2024-09-13 09:18:04,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:18:04,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303180425] [2024-09-13 09:18:04,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303180425] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:18:04,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:18:04,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-13 09:18:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500763905] [2024-09-13 09:18:04,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:18:04,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 09:18:04,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:18:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 09:18:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 09:18:04,335 INFO L87 Difference]: Start difference. First operand 1181 states and 1887 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:18:07,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:18:07,974 INFO L93 Difference]: Finished difference Result 1325 states and 2100 transitions. [2024-09-13 09:18:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 09:18:07,976 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-09-13 09:18:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:18:07,983 INFO L225 Difference]: With dead ends: 1325 [2024-09-13 09:18:07,983 INFO L226 Difference]: Without dead ends: 1320 [2024-09-13 09:18:07,984 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 09:18:07,985 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:18:07,985 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 541 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 09:18:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-09-13 09:18:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1295. [2024-09-13 09:18:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 642 states have (on average 1.2990654205607477) internal successors, (834), 642 states have internal predecessors, (834), 619 states have call successors, (619), 35 states have call predecessors, (619), 33 states have return successors, (617), 617 states have call predecessors, (617), 617 states have call successors, (617) [2024-09-13 09:18:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2070 transitions. [2024-09-13 09:18:10,023 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2070 transitions. Word has length 115 [2024-09-13 09:18:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:18:10,023 INFO L474 AbstractCegarLoop]: Abstraction has 1295 states and 2070 transitions. [2024-09-13 09:18:10,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:18:10,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2070 transitions. [2024-09-13 09:18:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 09:18:10,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:18:10,025 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 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] [2024-09-13 09:18:10,038 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-13 09:18:10,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 09:18:10,226 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:18:10,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-13 09:18:10,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:18:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710383707] [2024-09-13 09:18:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:18:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:18:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:18:10,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872099333] [2024-09-13 09:18:10,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:18:10,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:18:10,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:18:10,245 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:18:10,247 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 09:18:10,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 09:18:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:18:10,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-13 09:18:10,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:18:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 51 proven. 108 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-09-13 09:18:11,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:18:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:18:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710383707] [2024-09-13 09:18:14,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:18:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872099333] [2024-09-13 09:18:14,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872099333] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:18:14,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:18:14,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-13 09:18:15,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31246060] [2024-09-13 09:18:15,000 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:18:15,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 09:18:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:18:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 09:18:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:18:15,001 INFO L87 Difference]: Start difference. First operand 1295 states and 2070 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:18:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:18:19,307 INFO L93 Difference]: Finished difference Result 1521 states and 2421 transitions. [2024-09-13 09:18:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 09:18:19,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 120 [2024-09-13 09:18:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:18:19,314 INFO L225 Difference]: With dead ends: 1521 [2024-09-13 09:18:19,314 INFO L226 Difference]: Without dead ends: 1516 [2024-09-13 09:18:19,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 09:18:19,315 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:18:19,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 951 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 09:18:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2024-09-13 09:18:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1386. [2024-09-13 09:18:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 685 states have (on average 1.2992700729927007) internal successors, (890), 685 states have internal predecessors, (890), 663 states have call successors, (663), 39 states have call predecessors, (663), 37 states have return successors, (661), 661 states have call predecessors, (661), 661 states have call successors, (661) [2024-09-13 09:18:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2214 transitions. [2024-09-13 09:18:21,458 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2214 transitions. Word has length 120 [2024-09-13 09:18:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:18:21,458 INFO L474 AbstractCegarLoop]: Abstraction has 1386 states and 2214 transitions. [2024-09-13 09:18:21,458 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-13 09:18:21,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2214 transitions. [2024-09-13 09:18:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-13 09:18:21,460 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:18:21,460 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:18:21,466 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 09:18:21,662 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-13 09:18:21,663 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:18:21,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-13 09:18:21,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:18:21,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057993215] [2024-09-13 09:18:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:18:21,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:18:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:18:21,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979501737] [2024-09-13 09:18:21,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 09:18:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:18:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:18:21,677 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:18:21,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 09:18:21,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-13 09:18:21,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:18:21,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 09:18:21,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:18:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 09:18:22,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:18:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 09:18:26,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:18:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057993215] [2024-09-13 09:18:26,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:18:26,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979501737] [2024-09-13 09:18:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979501737] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:18:26,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:18:26,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-09-13 09:18:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826245056] [2024-09-13 09:18:26,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:18:26,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-13 09:18:26,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:18:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-13 09:18:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-09-13 09:18:26,695 INFO L87 Difference]: Start difference. First operand 1386 states and 2214 transitions. Second operand has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-13 09:18:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:18:41,322 INFO L93 Difference]: Finished difference Result 2389 states and 3902 transitions. [2024-09-13 09:18:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-13 09:18:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 132 [2024-09-13 09:18:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:18:41,333 INFO L225 Difference]: With dead ends: 2389 [2024-09-13 09:18:41,333 INFO L226 Difference]: Without dead ends: 2383 [2024-09-13 09:18:41,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1501, Invalid=9419, Unknown=0, NotChecked=0, Total=10920 [2024-09-13 09:18:41,336 INFO L434 NwaCegarLoop]: 82 mSDtfsCounter, 238 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-13 09:18:41,336 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1302 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-09-13 09:18:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2024-09-13 09:18:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1680. [2024-09-13 09:18:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 822 states have (on average 1.3065693430656935) internal successors, (1074), 822 states have internal predecessors, (1074), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2024-09-13 09:18:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2710 transitions. [2024-09-13 09:18:44,097 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2710 transitions. Word has length 132 [2024-09-13 09:18:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:18:44,098 INFO L474 AbstractCegarLoop]: Abstraction has 1680 states and 2710 transitions. [2024-09-13 09:18:44,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-13 09:18:44,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2710 transitions. [2024-09-13 09:18:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-13 09:18:44,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:18:44,100 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:18:44,106 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 09:18:44,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 09:18:44,305 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:18:44,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:44,305 INFO L85 PathProgramCache]: Analyzing trace with hash 125055237, now seen corresponding path program 7 times [2024-09-13 09:18:44,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:18:44,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757582991] [2024-09-13 09:18:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:18:44,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:18:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:18:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:18:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 09:18:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 09:18:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:18:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 09:18:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 09:18:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 09:18:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 09:18:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-13 09:18:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 09:18:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-13 09:18:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-13 09:18:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-13 09:18:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-13 09:18:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-13 09:18:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-13 09:18:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-13 09:18:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 09:18:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-13 09:18:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-13 09:18:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-09-13 09:18:44,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:18:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757582991] [2024-09-13 09:18:44,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757582991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:18:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855815068] [2024-09-13 09:18:44,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 09:18:44,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:18:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:18:44,448 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:18:44,449 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 09:18:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:18:44,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 09:18:44,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:18:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 250 proven. 18 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-13 09:18:44,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:18:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-09-13 09:18:44,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855815068] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:18:44,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:18:44,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-13 09:18:44,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498386954] [2024-09-13 09:18:44,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:18:44,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:18:44,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:18:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:18:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:18:44,634 INFO L87 Difference]: Start difference. First operand 1680 states and 2710 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-13 09:18:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:18:48,019 INFO L93 Difference]: Finished difference Result 2843 states and 4592 transitions. [2024-09-13 09:18:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:18:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 137 [2024-09-13 09:18:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:18:48,029 INFO L225 Difference]: With dead ends: 2843 [2024-09-13 09:18:48,029 INFO L226 Difference]: Without dead ends: 1920 [2024-09-13 09:18:48,032 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 311 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:18:48,033 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:18:48,033 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 286 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:18:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2024-09-13 09:18:51,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1741. [2024-09-13 09:18:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 883 states have (on average 1.2865232163080407) internal successors, (1136), 907 states have internal predecessors, (1136), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 793 states have call predecessors, (817), 817 states have call successors, (817) [2024-09-13 09:18:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2772 transitions. [2024-09-13 09:18:51,209 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2772 transitions. Word has length 137 [2024-09-13 09:18:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:18:51,209 INFO L474 AbstractCegarLoop]: Abstraction has 1741 states and 2772 transitions. [2024-09-13 09:18:51,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-13 09:18:51,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2772 transitions. [2024-09-13 09:18:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-13 09:18:51,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:18:51,212 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-13 09:18:51,229 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-13 09:18:51,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 09:18:51,413 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:18:51,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:18:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 8 times [2024-09-13 09:18:51,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:18:51,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888459458] [2024-09-13 09:18:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:18:51,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:18:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:18:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230088880] [2024-09-13 09:18:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:18:51,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:18:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:18:51,436 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:18:51,437 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 09:18:51,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:18:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:18:51,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-13 09:18:51,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:18:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 82 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-13 09:18:52,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:18:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-13 09:18:57,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:18:57,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888459458] [2024-09-13 09:18:57,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:18:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230088880] [2024-09-13 09:18:57,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230088880] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:18:57,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:18:57,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2024-09-13 09:18:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99375880] [2024-09-13 09:18:57,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:18:57,653 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-13 09:18:57,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:18:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-13 09:18:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 09:18:57,655 INFO L87 Difference]: Start difference. First operand 1741 states and 2772 transitions. Second operand has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-13 09:19:14,579 WARN L293 SmtUtils]: Spent 12.28s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 09:19:22,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:19:25,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:19:46,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:20:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:20:09,062 INFO L93 Difference]: Finished difference Result 2076 states and 3230 transitions. [2024-09-13 09:20:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-13 09:20:09,063 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 140 [2024-09-13 09:20:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:20:09,073 INFO L225 Difference]: With dead ends: 2076 [2024-09-13 09:20:09,073 INFO L226 Difference]: Without dead ends: 1901 [2024-09-13 09:20:09,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=2237, Invalid=8682, Unknown=1, NotChecked=0, Total=10920 [2024-09-13 09:20:09,077 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 347 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 442 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:20:09,078 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 908 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1268 Invalid, 1 Unknown, 0 Unchecked, 15.4s Time] [2024-09-13 09:20:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2024-09-13 09:20:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1774. [2024-09-13 09:20:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 907 states have (on average 1.2855567805953694) internal successors, (1166), 936 states have internal predecessors, (1166), 827 states have call successors, (827), 41 states have call predecessors, (827), 39 states have return successors, (825), 796 states have call predecessors, (825), 825 states have call successors, (825) [2024-09-13 09:20:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2818 transitions. [2024-09-13 09:20:13,247 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2818 transitions. Word has length 140 [2024-09-13 09:20:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:20:13,247 INFO L474 AbstractCegarLoop]: Abstraction has 1774 states and 2818 transitions. [2024-09-13 09:20:13,248 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-13 09:20:13,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:20:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2818 transitions. [2024-09-13 09:20:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-13 09:20:13,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:20:13,250 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:20:13,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-13 09:20:13,454 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 09:20:13,455 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:20:13,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:20:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1581427678, now seen corresponding path program 9 times [2024-09-13 09:20:13,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:20:13,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227155057] [2024-09-13 09:20:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:20:13,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:20:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:20:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067681845] [2024-09-13 09:20:13,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:20:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:20:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:20:13,479 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:20:13,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 09:20:13,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 09:20:13,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:20:13,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-13 09:20:13,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:20:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 70 proven. 88 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-13 09:20:15,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:20:23,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:20:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227155057] [2024-09-13 09:20:23,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:20:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067681845] [2024-09-13 09:20:23,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067681845] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:20:23,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:20:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-13 09:20:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142167625] [2024-09-13 09:20:23,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:20:23,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 09:20:23,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:20:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 09:20:23,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 09:20:23,759 INFO L87 Difference]: Start difference. First operand 1774 states and 2818 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-13 09:20:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:20:30,824 INFO L93 Difference]: Finished difference Result 2041 states and 3249 transitions. [2024-09-13 09:20:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 09:20:30,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 142 [2024-09-13 09:20:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:20:30,839 INFO L225 Difference]: With dead ends: 2041 [2024-09-13 09:20:30,842 INFO L226 Difference]: Without dead ends: 2036 [2024-09-13 09:20:30,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 09:20:30,844 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 116 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:20:30,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 622 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 09:20:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2024-09-13 09:20:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1822. [2024-09-13 09:20:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 930 states have (on average 1.2860215053763442) internal successors, (1196), 959 states have internal predecessors, (1196), 851 states have call successors, (851), 42 states have call predecessors, (851), 40 states have return successors, (849), 820 states have call predecessors, (849), 849 states have call successors, (849) [2024-09-13 09:20:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2896 transitions. [2024-09-13 09:20:35,363 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2896 transitions. Word has length 142 [2024-09-13 09:20:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:20:35,367 INFO L474 AbstractCegarLoop]: Abstraction has 1822 states and 2896 transitions. [2024-09-13 09:20:35,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-13 09:20:35,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:20:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2896 transitions. [2024-09-13 09:20:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-13 09:20:35,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:20:35,370 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2024-09-13 09:20:35,395 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-13 09:20:35,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 09:20:35,570 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:20:35,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:20:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1042986500, now seen corresponding path program 10 times [2024-09-13 09:20:35,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:20:35,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188838030] [2024-09-13 09:20:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:20:35,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:20:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:20:35,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367652754] [2024-09-13 09:20:35,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:20:35,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:20:35,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:20:35,603 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:20:35,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 09:20:35,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:20:35,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:20:35,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-09-13 09:20:35,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:20:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 76 proven. 94 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-13 09:20:37,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:20:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:20:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188838030] [2024-09-13 09:20:38,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:20:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367652754] [2024-09-13 09:20:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367652754] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:20:38,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:20:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-13 09:20:38,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178809192] [2024-09-13 09:20:38,735 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:20:38,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 09:20:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:20:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 09:20:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 09:20:38,736 INFO L87 Difference]: Start difference. First operand 1822 states and 2896 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21)