./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.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 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:55:48,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:55:48,631 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:55:48,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:55:48,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:55:48,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:55:48,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:55:48,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:55:48,664 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:55:48,666 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:55:48,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:55:48,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:55:48,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:55:48,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:55:48,667 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:55:48,667 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:55:48,667 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:55:48,667 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:55:48,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:55:48,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:55:48,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:55:48,671 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:55:48,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:55:48,672 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:55:48,672 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:55:48,672 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:55:48,672 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:55:48,672 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:55:48,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:55:48,673 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:55:48,673 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:55:48,673 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:55:48,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:55:48,673 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:55:48,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:55:48,674 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:55:48,674 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:55:48,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:55:48,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:55:48,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:55:48,674 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:55:48,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:55:48,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:55:48,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:55:48,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:55:48,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:55:48,929 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:55:48,930 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:55:48,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-09-21 11:55:50,145 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:55:50,280 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:55:50,281 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-09-21 11:55:50,288 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c3f091b61/f2ac5975137046f3b3346555ef4f3857/FLAGe67c77384 [2024-09-21 11:55:50,708 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c3f091b61/f2ac5975137046f3b3346555ef4f3857 [2024-09-21 11:55:50,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:55:50,712 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:55:50,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:55:50,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:55:50,718 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:55:50,718 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,719 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bdf0c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50, skipping insertion in model container [2024-09-21 11:55:50,719 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:55:50,867 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2024-09-21 11:55:50,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:55:50,903 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:55:50,914 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2024-09-21 11:55:50,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:55:50,941 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:55:50,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50 WrapperNode [2024-09-21 11:55:50,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:55:50,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:55:50,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:55:50,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:55:50,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,966 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:55:50,967 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:55:50,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:55:50,968 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:55:50,968 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:55:50,975 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,979 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,994 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-21 11:55:50,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:50,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:51,002 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:51,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:51,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:51,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:55:51,010 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:55:51,010 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:55:51,011 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:55:51,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (1/1) ... [2024-09-21 11:55:51,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:55:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:51,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:55:51,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:55:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:55:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 11:55:51,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 11:55:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:55:51,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:55:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:55:51,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:55:51,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:55:51,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:55:51,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:55:51,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:55:51,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:55:51,137 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:55:51,139 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:55:51,280 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:55:51,281 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:55:51,294 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:55:51,294 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-21 11:55:51,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:55:51 BoogieIcfgContainer [2024-09-21 11:55:51,295 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:55:51,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:55:51,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:55:51,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:55:51,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:55:50" (1/3) ... [2024-09-21 11:55:51,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc4259b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:55:51, skipping insertion in model container [2024-09-21 11:55:51,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:55:50" (2/3) ... [2024-09-21 11:55:51,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc4259b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:55:51, skipping insertion in model container [2024-09-21 11:55:51,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:55:51" (3/3) ... [2024-09-21 11:55:51,305 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2024-09-21 11:55:51,318 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:55:51,319 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:55:51,358 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:55:51,363 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;@3e5bd4bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:55:51,364 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:55:51,367 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) [2024-09-21 11:55:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-21 11:55:51,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:51,373 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] [2024-09-21 11:55:51,374 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:51,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-21 11:55:51,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:51,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161017574] [2024-09-21 11:55:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:51,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:55:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:55:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:55:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:55:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:55:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:55:51,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:51,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161017574] [2024-09-21 11:55:51,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161017574] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:55:51,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:55:51,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:55:51,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898420822] [2024-09-21 11:55:51,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:55:51,581 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:55:51,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:51,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:55:51,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:55:51,604 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) [2024-09-21 11:55:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:51,635 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-21 11:55:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:55:51,638 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 [2024-09-21 11:55:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:51,644 INFO L225 Difference]: With dead ends: 70 [2024-09-21 11:55:51,645 INFO L226 Difference]: Without dead ends: 34 [2024-09-21 11:55:51,649 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 [2024-09-21 11:55:51,653 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 [2024-09-21 11:55:51,654 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] [2024-09-21 11:55:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-21 11:55:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-21 11:55:51,690 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) [2024-09-21 11:55:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-21 11:55:51,694 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-21 11:55:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:51,695 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-21 11:55:51,695 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) [2024-09-21 11:55:51,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-21 11:55:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-21 11:55:51,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:51,699 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] [2024-09-21 11:55:51,699 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:55:51,699 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:51,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-21 11:55:51,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:51,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410319510] [2024-09-21 11:55:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:51,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:55:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:55:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:55:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:55:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:55:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 11:55:51,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:51,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410319510] [2024-09-21 11:55:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410319510] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:55:51,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:55:51,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-21 11:55:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654881707] [2024-09-21 11:55:52,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:55:52,001 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-21 11:55:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-21 11:55:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:55:52,005 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) [2024-09-21 11:55:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:52,103 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-21 11:55:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:55:52,104 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 [2024-09-21 11:55:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:52,105 INFO L225 Difference]: With dead ends: 53 [2024-09-21 11:55:52,105 INFO L226 Difference]: Without dead ends: 46 [2024-09-21 11:55:52,105 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 [2024-09-21 11:55:52,106 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-21 11:55:52,106 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] [2024-09-21 11:55:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-21 11:55:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-21 11:55:52,118 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) [2024-09-21 11:55:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-21 11:55:52,119 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-21 11:55:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:52,120 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-21 11:55:52,120 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) [2024-09-21 11:55:52,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-21 11:55:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-21 11:55:52,121 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:52,121 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] [2024-09-21 11:55:52,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:55:52,122 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:52,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-21 11:55:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:52,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284178587] [2024-09-21 11:55:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:52,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:55:52,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581187329] [2024-09-21 11:55:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:52,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:52,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:52,154 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:52,159 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:55:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:55:52,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:55:52,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:55:52,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284178587] [2024-09-21 11:55:52,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:55:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581187329] [2024-09-21 11:55:52,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581187329] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:55:52,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:55:52,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:55:52,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233353229] [2024-09-21 11:55:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:55:52,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:55:52,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:55:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:55:52,312 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) [2024-09-21 11:55:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:52,366 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-21 11:55:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:55:52,366 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 [2024-09-21 11:55:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:52,367 INFO L225 Difference]: With dead ends: 52 [2024-09-21 11:55:52,367 INFO L226 Difference]: Without dead ends: 50 [2024-09-21 11:55:52,368 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 [2024-09-21 11:55:52,368 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 [2024-09-21 11:55:52,369 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] [2024-09-21 11:55:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-21 11:55:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-21 11:55:52,379 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) [2024-09-21 11:55:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-21 11:55:52,381 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-21 11:55:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:52,381 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-21 11:55:52,381 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) [2024-09-21 11:55:52,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-21 11:55:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-21 11:55:52,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:52,383 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] [2024-09-21 11:55:52,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:55:52,583 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:52,584 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:52,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-21 11:55:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226933769] [2024-09-21 11:55:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:52,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:55:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:55:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:55:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:55:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:55:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 11:55:52,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226933769] [2024-09-21 11:55:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226933769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:55:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024963405] [2024-09-21 11:55:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:52,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:52,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:52,733 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:55:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:52,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:55:52,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 11:55:52,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:55:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 11:55:52,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024963405] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:55:52,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:55:52,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-21 11:55:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662067361] [2024-09-21 11:55:52,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:55:52,902 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 11:55:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 11:55:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:55:52,903 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) [2024-09-21 11:55:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:53,070 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-21 11:55:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:55:53,071 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 [2024-09-21 11:55:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:53,072 INFO L225 Difference]: With dead ends: 102 [2024-09-21 11:55:53,072 INFO L226 Difference]: Without dead ends: 95 [2024-09-21 11:55:53,073 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 [2024-09-21 11:55:53,073 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 [2024-09-21 11:55:53,074 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] [2024-09-21 11:55:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-21 11:55:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-21 11:55:53,094 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) [2024-09-21 11:55:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-21 11:55:53,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-21 11:55:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:53,096 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-21 11:55:53,096 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) [2024-09-21 11:55:53,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-21 11:55:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-21 11:55:53,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:53,097 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] [2024-09-21 11:55:53,109 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:55:53,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:53,302 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:53,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-21 11:55:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:53,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160509234] [2024-09-21 11:55:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:53,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:55:53,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960546304] [2024-09-21 11:55:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:53,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:53,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:53,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:53,318 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:55:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:53,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:55:53,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:55:53,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:55:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160509234] [2024-09-21 11:55:53,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:55:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960546304] [2024-09-21 11:55:53,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960546304] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:55:53,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:55:53,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:55:53,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124056068] [2024-09-21 11:55:53,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:55:53,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:55:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:55:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:55:53,427 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) [2024-09-21 11:55:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:53,483 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-21 11:55:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:55:53,483 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 [2024-09-21 11:55:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:53,484 INFO L225 Difference]: With dead ends: 78 [2024-09-21 11:55:53,485 INFO L226 Difference]: Without dead ends: 76 [2024-09-21 11:55:53,485 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 [2024-09-21 11:55:53,486 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 [2024-09-21 11:55:53,486 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] [2024-09-21 11:55:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-21 11:55:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-21 11:55:53,506 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) [2024-09-21 11:55:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-21 11:55:53,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-21 11:55:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:53,508 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-21 11:55:53,508 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) [2024-09-21 11:55:53,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-21 11:55:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-21 11:55:53,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:53,509 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] [2024-09-21 11:55:53,532 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 11:55:53,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:53,712 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:53,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-21 11:55:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964589060] [2024-09-21 11:55:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:55:53,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694936264] [2024-09-21 11:55:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:53,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:53,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:53,736 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:55:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:53,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-21 11:55:53,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 11:55:54,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:55:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:55:54,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:54,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964589060] [2024-09-21 11:55:54,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:55:54,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694936264] [2024-09-21 11:55:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694936264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:55:54,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:55:54,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-21 11:55:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681516456] [2024-09-21 11:55:54,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:55:54,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 11:55:54,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 11:55:54,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-21 11:55:54,261 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) [2024-09-21 11:55:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:55,378 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-21 11:55:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 11:55:55,379 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 [2024-09-21 11:55:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:55,380 INFO L225 Difference]: With dead ends: 132 [2024-09-21 11:55:55,381 INFO L226 Difference]: Without dead ends: 130 [2024-09-21 11:55:55,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:55:55,382 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 [2024-09-21 11:55:55,382 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] [2024-09-21 11:55:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-21 11:55:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-21 11:55:55,410 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) [2024-09-21 11:55:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-21 11:55:55,413 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-21 11:55:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:55,413 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-21 11:55:55,413 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) [2024-09-21 11:55:55,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-21 11:55:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 11:55:55,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:55,415 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] [2024-09-21 11:55:55,429 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 11:55:55,616 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:55,616 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:55,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-21 11:55:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:55,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766242256] [2024-09-21 11:55:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:55:55,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999484860] [2024-09-21 11:55:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:55,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:55,638 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:55:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:55,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:55:55,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 11:55:55,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:55:55,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:55,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766242256] [2024-09-21 11:55:55,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:55:55,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999484860] [2024-09-21 11:55:55,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999484860] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:55:55,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:55:55,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:55:55,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658805200] [2024-09-21 11:55:55,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:55:55,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:55:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:55:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:55:55,718 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) [2024-09-21 11:55:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:55,793 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-21 11:55:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:55:55,794 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 [2024-09-21 11:55:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:55,796 INFO L225 Difference]: With dead ends: 155 [2024-09-21 11:55:55,796 INFO L226 Difference]: Without dead ends: 153 [2024-09-21 11:55:55,796 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 [2024-09-21 11:55:55,798 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 [2024-09-21 11:55:55,799 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] [2024-09-21 11:55:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-21 11:55:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-21 11:55:55,838 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) [2024-09-21 11:55:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-21 11:55:55,839 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-21 11:55:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:55,839 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-21 11:55:55,840 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) [2024-09-21 11:55:55,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-21 11:55:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 11:55:55,843 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:55,843 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] [2024-09-21 11:55:55,857 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 11:55:56,043 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 11:55:56,044 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:56,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-21 11:55:56,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:56,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901319465] [2024-09-21 11:55:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:55:56,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985855396] [2024-09-21 11:55:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:56,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:56,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:56,058 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:55:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:56,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 11:55:56,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:55:56,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:55:56,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:56,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901319465] [2024-09-21 11:55:56,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:55:56,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985855396] [2024-09-21 11:55:56,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985855396] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:55:56,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:55:56,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-21 11:55:56,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117714829] [2024-09-21 11:55:56,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:55:56,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 11:55:56,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 11:55:56,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-21 11:55:56,267 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) [2024-09-21 11:55:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:56,445 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-21 11:55:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 11:55:56,445 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 [2024-09-21 11:55:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:56,447 INFO L225 Difference]: With dead ends: 174 [2024-09-21 11:55:56,448 INFO L226 Difference]: Without dead ends: 172 [2024-09-21 11:55:56,449 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 [2024-09-21 11:55:56,450 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 [2024-09-21 11:55:56,450 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] [2024-09-21 11:55:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-21 11:55:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-21 11:55:56,488 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) [2024-09-21 11:55:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-21 11:55:56,490 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-21 11:55:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:56,490 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-21 11:55:56,491 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) [2024-09-21 11:55:56,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-21 11:55:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-21 11:55:56,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:56,492 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] [2024-09-21 11:55:56,505 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 11:55:56,696 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:56,697 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:56,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-21 11:55:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:56,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704461152] [2024-09-21 11:55:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:55:56,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396020349] [2024-09-21 11:55:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:56,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:56,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:56,708 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:56,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:55:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:56,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:55:56,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-21 11:55:56,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:55:56,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704461152] [2024-09-21 11:55:56,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:55:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396020349] [2024-09-21 11:55:56,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396020349] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:55:56,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:55:56,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:55:56,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143550284] [2024-09-21 11:55:56,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:55:56,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:55:56,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:55:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:55:56,774 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) [2024-09-21 11:55:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:56,882 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-21 11:55:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:55:56,882 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 [2024-09-21 11:55:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:56,885 INFO L225 Difference]: With dead ends: 254 [2024-09-21 11:55:56,885 INFO L226 Difference]: Without dead ends: 252 [2024-09-21 11:55:56,886 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 [2024-09-21 11:55:56,886 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 [2024-09-21 11:55:56,887 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] [2024-09-21 11:55:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-21 11:55:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-21 11:55:56,936 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) [2024-09-21 11:55:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-21 11:55:56,938 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-21 11:55:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:56,938 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-21 11:55:56,938 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) [2024-09-21 11:55:56,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-21 11:55:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-21 11:55:56,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:56,939 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] [2024-09-21 11:55:56,951 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 11:55:57,139 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:57,140 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:57,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-21 11:55:57,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:57,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823106005] [2024-09-21 11:55:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:57,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:55:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:55:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:55:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:55:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:55:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:55:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:55:57,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:57,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823106005] [2024-09-21 11:55:57,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823106005] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:55:57,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:55:57,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:55:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971957750] [2024-09-21 11:55:57,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:55:57,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:55:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:55:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:55:57,202 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) [2024-09-21 11:55:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:55:57,307 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-21 11:55:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:55:57,308 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 [2024-09-21 11:55:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:55:57,310 INFO L225 Difference]: With dead ends: 291 [2024-09-21 11:55:57,310 INFO L226 Difference]: Without dead ends: 177 [2024-09-21 11:55:57,312 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 [2024-09-21 11:55:57,312 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:55:57,312 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:55:57,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-21 11:55:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-21 11:55:57,349 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) [2024-09-21 11:55:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-21 11:55:57,350 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-21 11:55:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:55:57,351 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-21 11:55:57,351 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) [2024-09-21 11:55:57,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-21 11:55:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-21 11:55:57,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:55:57,352 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] [2024-09-21 11:55:57,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-21 11:55:57,352 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:55:57,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:55:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-21 11:55:57,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:55:57,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042232773] [2024-09-21 11:55:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:57,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:55:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:55:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192048521] [2024-09-21 11:55:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:55:57,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:55:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:55:57,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:55:57,371 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:55:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:55:57,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-21 11:55:57,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:55:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-21 11:55:57,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:55:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-21 11:55:59,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:55:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042232773] [2024-09-21 11:55:59,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:55:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192048521] [2024-09-21 11:55:59,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192048521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:55:59,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:55:59,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-21 11:55:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884364357] [2024-09-21 11:55:59,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:55:59,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:55:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:55:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:55:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:55:59,398 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) [2024-09-21 11:56:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:02,963 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-21 11:56:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-21 11:56:02,963 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 [2024-09-21 11:56:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:02,967 INFO L225 Difference]: With dead ends: 393 [2024-09-21 11:56:02,968 INFO L226 Difference]: Without dead ends: 385 [2024-09-21 11:56:02,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-21 11:56:02,970 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 1.9s IncrementalHoareTripleChecker+Time [2024-09-21 11:56:02,970 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-21 11:56:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-21 11:56:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-21 11:56:03,064 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) [2024-09-21 11:56:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-21 11:56:03,066 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-21 11:56:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:03,066 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-21 11:56:03,067 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) [2024-09-21 11:56:03,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-21 11:56:03,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-21 11:56:03,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:03,068 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] [2024-09-21 11:56:03,084 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 11:56:03,271 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 [2024-09-21 11:56:03,272 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:03,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-21 11:56:03,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:03,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742248118] [2024-09-21 11:56:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:56:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:56:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:56:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:56:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:56:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:56:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 11:56:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:56:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-21 11:56:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 11:56:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-21 11:56:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-21 11:56:03,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:03,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742248118] [2024-09-21 11:56:03,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742248118] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:56:03,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:56:03,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:56:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017183090] [2024-09-21 11:56:03,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:56:03,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:56:03,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:56:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:56:03,354 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) [2024-09-21 11:56:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:03,479 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-21 11:56:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:56:03,480 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 [2024-09-21 11:56:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:03,481 INFO L225 Difference]: With dead ends: 399 [2024-09-21 11:56:03,481 INFO L226 Difference]: Without dead ends: 243 [2024-09-21 11:56:03,482 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 [2024-09-21 11:56:03,483 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 [2024-09-21 11:56:03,483 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] [2024-09-21 11:56:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-21 11:56:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-21 11:56:03,577 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) [2024-09-21 11:56:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-21 11:56:03,579 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-21 11:56:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:03,579 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-21 11:56:03,579 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) [2024-09-21 11:56:03,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-21 11:56:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-21 11:56:03,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:03,580 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] [2024-09-21 11:56:03,580 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-21 11:56:03,580 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:03,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-21 11:56:03,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:03,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191518754] [2024-09-21 11:56:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:03,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:03,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369931175] [2024-09-21 11:56:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:03,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:03,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:56:03,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 11:56:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:03,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-21 11:56:03,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-21 11:56:03,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-21 11:56:03,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191518754] [2024-09-21 11:56:03,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:56:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369931175] [2024-09-21 11:56:03,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369931175] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 11:56:03,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:56:03,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-21 11:56:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504175973] [2024-09-21 11:56:03,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:56:03,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:56:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:56:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:56:03,760 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) [2024-09-21 11:56:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:03,878 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-21 11:56:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:56:03,879 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 [2024-09-21 11:56:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:03,880 INFO L225 Difference]: With dead ends: 234 [2024-09-21 11:56:03,880 INFO L226 Difference]: Without dead ends: 232 [2024-09-21 11:56:03,880 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 [2024-09-21 11:56:03,881 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 [2024-09-21 11:56:03,881 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] [2024-09-21 11:56:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-21 11:56:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-21 11:56:03,971 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) [2024-09-21 11:56:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-21 11:56:03,973 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-21 11:56:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:03,973 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-21 11:56:03,973 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) [2024-09-21 11:56:03,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-21 11:56:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-21 11:56:03,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:03,974 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] [2024-09-21 11:56:03,986 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 11:56:04,178 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 [2024-09-21 11:56:04,178 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:04,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-21 11:56:04,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:04,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824878356] [2024-09-21 11:56:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:04,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:04,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966996546] [2024-09-21 11:56:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:04,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:04,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:04,198 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) [2024-09-21 11:56:04,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 11:56:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:04,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-21 11:56:04,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-21 11:56:04,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-21 11:56:05,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824878356] [2024-09-21 11:56:05,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:56:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966996546] [2024-09-21 11:56:05,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966996546] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:56:05,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:56:05,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-21 11:56:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427866808] [2024-09-21 11:56:05,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:56:05,388 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:56:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:56:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:56:05,389 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) [2024-09-21 11:56:10,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:56:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:14,381 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-09-21 11:56:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-21 11:56:14,381 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 [2024-09-21 11:56:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:14,383 INFO L225 Difference]: With dead ends: 350 [2024-09-21 11:56:14,383 INFO L226 Difference]: Without dead ends: 348 [2024-09-21 11:56:14,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-09-21 11:56:14,384 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 120 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:56:14,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 444 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2024-09-21 11:56:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-21 11:56:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-09-21 11:56:14,539 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) [2024-09-21 11:56:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-09-21 11:56:14,541 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-09-21 11:56:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:14,541 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-09-21 11:56:14,541 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) [2024-09-21 11:56:14,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-09-21 11:56:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-21 11:56:14,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:14,542 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] [2024-09-21 11:56:14,554 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 11:56:14,742 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 [2024-09-21 11:56:14,743 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:14,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-21 11:56:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:14,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358637966] [2024-09-21 11:56:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:14,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879116888] [2024-09-21 11:56:14,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:56:14,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:14,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:14,757 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) [2024-09-21 11:56:14,758 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 11:56:14,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:56:14,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:56:14,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-21 11:56:14,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-21 11:56:14,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-21 11:56:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358637966] [2024-09-21 11:56:15,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:56:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879116888] [2024-09-21 11:56:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879116888] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:56:15,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:56:15,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-21 11:56:15,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933210253] [2024-09-21 11:56:15,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:56:15,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 11:56:15,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:15,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 11:56:15,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:56:15,069 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) [2024-09-21 11:56:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:15,838 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-09-21 11:56:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 11:56:15,838 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 [2024-09-21 11:56:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:15,841 INFO L225 Difference]: With dead ends: 426 [2024-09-21 11:56:15,841 INFO L226 Difference]: Without dead ends: 424 [2024-09-21 11:56:15,841 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 [2024-09-21 11:56:15,841 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 11:56:15,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 11:56:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-09-21 11:56:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-09-21 11:56:16,043 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) [2024-09-21 11:56:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-09-21 11:56:16,045 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-09-21 11:56:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:16,046 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-09-21 11:56:16,046 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) [2024-09-21 11:56:16,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-09-21 11:56:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-21 11:56:16,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:16,047 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] [2024-09-21 11:56:16,055 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-21 11:56:16,247 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 [2024-09-21 11:56:16,248 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:16,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-21 11:56:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570704750] [2024-09-21 11:56:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:16,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577879270] [2024-09-21 11:56:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:16,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:16,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:16,270 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) [2024-09-21 11:56:16,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 11:56:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:16,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-21 11:56:16,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-21 11:56:16,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-21 11:56:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:18,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570704750] [2024-09-21 11:56:18,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:56:18,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577879270] [2024-09-21 11:56:18,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577879270] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:56:18,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:56:18,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-21 11:56:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518543311] [2024-09-21 11:56:18,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:56:18,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 11:56:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 11:56:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:56:18,524 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) [2024-09-21 11:56:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:25,297 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-09-21 11:56:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-21 11:56:25,298 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 [2024-09-21 11:56:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:25,300 INFO L225 Difference]: With dead ends: 544 [2024-09-21 11:56:25,300 INFO L226 Difference]: Without dead ends: 540 [2024-09-21 11:56:25,301 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-21 11:56:25,302 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 210 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-21 11:56:25,302 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 708 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-21 11:56:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-21 11:56:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-09-21 11:56:25,635 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) [2024-09-21 11:56:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-09-21 11:56:25,638 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-09-21 11:56:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:25,638 INFO L474 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-09-21 11:56:25,638 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) [2024-09-21 11:56:25,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-09-21 11:56:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-21 11:56:25,639 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:25,640 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] [2024-09-21 11:56:25,655 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-21 11:56:25,840 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 [2024-09-21 11:56:25,841 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:25,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-21 11:56:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:25,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945137053] [2024-09-21 11:56:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:25,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:25,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228293876] [2024-09-21 11:56:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:25,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:25,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:25,867 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) [2024-09-21 11:56:25,868 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 11:56:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:25,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-21 11:56:25,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-21 11:56:26,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-21 11:56:26,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945137053] [2024-09-21 11:56:26,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:56:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228293876] [2024-09-21 11:56:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228293876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:56:26,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:56:26,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-21 11:56:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452020895] [2024-09-21 11:56:26,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:56:26,526 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 11:56:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 11:56:26,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-21 11:56:26,526 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) [2024-09-21 11:56:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:28,278 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-09-21 11:56:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-21 11:56:28,278 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 [2024-09-21 11:56:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:28,285 INFO L225 Difference]: With dead ends: 1227 [2024-09-21 11:56:28,286 INFO L226 Difference]: Without dead ends: 1225 [2024-09-21 11:56:28,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 11:56:28,287 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 149 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 11:56:28,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 411 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 11:56:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-21 11:56:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-09-21 11:56:29,215 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) [2024-09-21 11:56:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-09-21 11:56:29,221 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-09-21 11:56:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:29,221 INFO L474 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-09-21 11:56:29,221 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) [2024-09-21 11:56:29,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-09-21 11:56:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-21 11:56:29,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:29,226 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] [2024-09-21 11:56:29,237 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-21 11:56:29,426 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 [2024-09-21 11:56:29,426 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:29,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-21 11:56:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:29,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967417111] [2024-09-21 11:56:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:29,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:29,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497965431] [2024-09-21 11:56:29,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:56:29,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:29,442 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) [2024-09-21 11:56:29,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 11:56:29,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 11:56:29,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:56:29,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-21 11:56:29,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-21 11:56:29,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-21 11:56:30,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:30,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967417111] [2024-09-21 11:56:30,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:56:30,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497965431] [2024-09-21 11:56:30,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497965431] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:56:30,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:56:30,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-21 11:56:30,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185910767] [2024-09-21 11:56:30,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:56:30,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-21 11:56:30,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-21 11:56:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-21 11:56:30,031 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) [2024-09-21 11:56:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:32,262 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-09-21 11:56:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-21 11:56:32,262 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 [2024-09-21 11:56:32,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:32,269 INFO L225 Difference]: With dead ends: 1373 [2024-09-21 11:56:32,269 INFO L226 Difference]: Without dead ends: 1369 [2024-09-21 11:56:32,270 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-21 11:56:32,270 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 11:56:32,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 393 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 11:56:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-09-21 11:56:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-09-21 11:56:33,377 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) [2024-09-21 11:56:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-09-21 11:56:33,384 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-09-21 11:56:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:33,384 INFO L474 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-09-21 11:56:33,384 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) [2024-09-21 11:56:33,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-09-21 11:56:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-21 11:56:33,386 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:33,386 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] [2024-09-21 11:56:33,392 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-21 11:56:33,590 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 [2024-09-21 11:56:33,591 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:33,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-21 11:56:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:33,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488471421] [2024-09-21 11:56:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:56:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:56:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:56:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:56:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:56:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 11:56:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:56:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-21 11:56:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-21 11:56:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-21 11:56:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-21 11:56:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-21 11:56:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-21 11:56:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:56:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-21 11:56:33,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488471421] [2024-09-21 11:56:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488471421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:56:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859845489] [2024-09-21 11:56:33,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:56:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:33,761 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) [2024-09-21 11:56:33,761 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-21 11:56:33,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:56:33,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:56:33,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 11:56:33,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-21 11:56:33,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-21 11:56:33,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859845489] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:56:33,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:56:33,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-21 11:56:33,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530083931] [2024-09-21 11:56:33,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:56:33,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 11:56:33,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 11:56:33,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:56:33,938 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) [2024-09-21 11:56:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:35,466 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-09-21 11:56:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 11:56:35,467 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 [2024-09-21 11:56:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:35,474 INFO L225 Difference]: With dead ends: 1291 [2024-09-21 11:56:35,474 INFO L226 Difference]: Without dead ends: 1286 [2024-09-21 11:56:35,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:56:35,475 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 [2024-09-21 11:56:35,475 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] [2024-09-21 11:56:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-21 11:56:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-09-21 11:56:36,620 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) [2024-09-21 11:56:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-09-21 11:56:36,627 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-09-21 11:56:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:36,627 INFO L474 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-09-21 11:56:36,627 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) [2024-09-21 11:56:36,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-09-21 11:56:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-21 11:56:36,629 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:36,629 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] [2024-09-21 11:56:36,635 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-21 11:56:36,830 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 [2024-09-21 11:56:36,830 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:36,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-21 11:56:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:36,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091943598] [2024-09-21 11:56:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:36,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:36,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343092530] [2024-09-21 11:56:36,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:56:36,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:36,850 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) [2024-09-21 11:56:36,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-21 11:56:36,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:56:36,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:56:36,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-21 11:56:36,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-21 11:56:37,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:56:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-09-21 11:56:40,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:56:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091943598] [2024-09-21 11:56:40,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:56:40,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343092530] [2024-09-21 11:56:40,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343092530] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:56:40,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:56:40,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2024-09-21 11:56:40,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314346537] [2024-09-21 11:56:40,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:56:40,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-21 11:56:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:56:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-21 11:56:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2024-09-21 11:56:40,688 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-21 11:56:47,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:56:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:56:57,353 INFO L93 Difference]: Finished difference Result 1442 states and 2319 transitions. [2024-09-21 11:56:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-21 11:56:57,354 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 112 [2024-09-21 11:56:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:56:57,361 INFO L225 Difference]: With dead ends: 1442 [2024-09-21 11:56:57,361 INFO L226 Difference]: Without dead ends: 1436 [2024-09-21 11:56:57,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1488, Invalid=5994, Unknown=0, NotChecked=0, Total=7482 [2024-09-21 11:56:57,363 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 274 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-09-21 11:56:57,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1096 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-09-21 11:56:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2024-09-21 11:56:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1164. [2024-09-21 11:56:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 575 states have (on average 1.3165217391304347) internal successors, (757), 575 states have internal predecessors, (757), 559 states have call successors, (559), 31 states have call predecessors, (559), 29 states have return successors, (557), 557 states have call predecessors, (557), 557 states have call successors, (557) [2024-09-21 11:56:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1873 transitions. [2024-09-21 11:56:58,888 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1873 transitions. Word has length 112 [2024-09-21 11:56:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:56:58,889 INFO L474 AbstractCegarLoop]: Abstraction has 1164 states and 1873 transitions. [2024-09-21 11:56:58,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-21 11:56:58,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1873 transitions. [2024-09-21 11:56:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-21 11:56:58,890 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:56:58,891 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] [2024-09-21 11:56:58,897 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-21 11:56:59,093 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 [2024-09-21 11:56:59,094 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:56:59,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:56:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-21 11:56:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:56:59,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366236170] [2024-09-21 11:56:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:56:59,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:56:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:56:59,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660649378] [2024-09-21 11:56:59,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:56:59,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:56:59,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:56:59,117 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) [2024-09-21 11:56:59,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-21 11:56:59,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-21 11:56:59,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:56:59,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-21 11:56:59,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:56:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-21 11:56:59,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:57:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-21 11:57:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:57:02,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366236170] [2024-09-21 11:57:02,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:57:02,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660649378] [2024-09-21 11:57:02,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660649378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:57:02,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:57:02,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-21 11:57:02,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571547123] [2024-09-21 11:57:02,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:57:02,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-21 11:57:02,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:57:02,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-21 11:57:02,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-09-21 11:57:02,322 INFO L87 Difference]: Start difference. First operand 1164 states and 1873 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) [2024-09-21 11:57:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:57:18,106 INFO L93 Difference]: Finished difference Result 1591 states and 2542 transitions. [2024-09-21 11:57:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-09-21 11:57:18,106 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 [2024-09-21 11:57:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:57:18,114 INFO L225 Difference]: With dead ends: 1591 [2024-09-21 11:57:18,114 INFO L226 Difference]: Without dead ends: 1585 [2024-09-21 11:57:18,116 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=2066, Invalid=9490, Unknown=0, NotChecked=0, Total=11556 [2024-09-21 11:57:18,116 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 307 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:57:18,117 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 974 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-21 11:57:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2024-09-21 11:57:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1348. [2024-09-21 11:57:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 671 states have (on average 1.3129657228017884) internal successors, (881), 671 states have internal predecessors, (881), 643 states have call successors, (643), 35 states have call predecessors, (643), 33 states have return successors, (641), 641 states have call predecessors, (641), 641 states have call successors, (641) [2024-09-21 11:57:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2165 transitions. [2024-09-21 11:57:20,228 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2165 transitions. Word has length 115 [2024-09-21 11:57:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:57:20,228 INFO L474 AbstractCegarLoop]: Abstraction has 1348 states and 2165 transitions. [2024-09-21 11:57:20,229 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) [2024-09-21 11:57:20,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:57:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2165 transitions. [2024-09-21 11:57:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-21 11:57:20,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:57:20,230 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] [2024-09-21 11:57:20,237 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-21 11:57:20,431 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 [2024-09-21 11:57:20,431 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:57:20,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:57:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-21 11:57:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:57:20,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011932023] [2024-09-21 11:57:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:57:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:57:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:57:20,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283956362] [2024-09-21 11:57:20,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:57:20,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:57:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:57:20,457 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) [2024-09-21 11:57:20,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-21 11:57:20,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:57:20,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:57:20,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-21 11:57:20,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:57:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-21 11:57:21,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:57:22,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:57:22,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011932023] [2024-09-21 11:57:22,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:57:22,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283956362] [2024-09-21 11:57:22,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283956362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:57:22,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:57:22,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-21 11:57:22,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795459374] [2024-09-21 11:57:22,860 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:57:22,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:57:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:57:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:57:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-09-21 11:57:22,861 INFO L87 Difference]: Start difference. First operand 1348 states and 2165 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) [2024-09-21 11:57:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:57:26,185 INFO L93 Difference]: Finished difference Result 1493 states and 2379 transitions. [2024-09-21 11:57:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 11:57:26,186 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 [2024-09-21 11:57:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:57:26,193 INFO L225 Difference]: With dead ends: 1493 [2024-09-21 11:57:26,193 INFO L226 Difference]: Without dead ends: 1488 [2024-09-21 11:57:26,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2024-09-21 11:57:26,194 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 86 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 11:57:26,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 800 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 11:57:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2024-09-21 11:57:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1462. [2024-09-21 11:57:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 725 states have (on average 1.3131034482758621) internal successors, (952), 725 states have internal predecessors, (952), 699 states have call successors, (699), 39 states have call predecessors, (699), 37 states have return successors, (697), 697 states have call predecessors, (697), 697 states have call successors, (697) [2024-09-21 11:57:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2348 transitions. [2024-09-21 11:57:28,520 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2348 transitions. Word has length 115 [2024-09-21 11:57:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:57:28,520 INFO L474 AbstractCegarLoop]: Abstraction has 1462 states and 2348 transitions. [2024-09-21 11:57:28,520 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) [2024-09-21 11:57:28,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:57:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2348 transitions. [2024-09-21 11:57:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-21 11:57:28,522 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:57:28,522 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] [2024-09-21 11:57:28,537 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-21 11:57:28,723 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 [2024-09-21 11:57:28,723 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:57:28,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:57:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-21 11:57:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:57:28,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954319790] [2024-09-21 11:57:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:57:28,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:57:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:57:28,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160277813] [2024-09-21 11:57:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:57:28,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:57:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:57:28,740 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) [2024-09-21 11:57:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-21 11:57:28,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-21 11:57:28,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:57:28,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-21 11:57:28,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:57:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-21 11:57:29,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:57:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-21 11:57:34,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:57:34,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954319790] [2024-09-21 11:57:34,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:57:34,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160277813] [2024-09-21 11:57:34,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160277813] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:57:34,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:57:34,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2024-09-21 11:57:34,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049982234] [2024-09-21 11:57:34,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:57:34,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-21 11:57:34,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:57:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-21 11:57:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-09-21 11:57:34,083 INFO L87 Difference]: Start difference. First operand 1462 states and 2348 transitions. Second operand has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-21 11:57:46,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:58:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:58:15,129 INFO L93 Difference]: Finished difference Result 2356 states and 3786 transitions. [2024-09-21 11:58:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-09-21 11:58:15,129 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 120 [2024-09-21 11:58:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:58:15,140 INFO L225 Difference]: With dead ends: 2356 [2024-09-21 11:58:15,140 INFO L226 Difference]: Without dead ends: 2350 [2024-09-21 11:58:15,144 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5531 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=3568, Invalid=14792, Unknown=0, NotChecked=0, Total=18360 [2024-09-21 11:58:15,144 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 457 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:58:15,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1308 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2024-09-21 11:58:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2024-09-21 11:58:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1808. [2024-09-21 11:58:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 916 states have (on average 1.3013100436681222) internal successors, (1192), 916 states have internal predecessors, (1192), 847 states have call successors, (847), 46 states have call predecessors, (847), 44 states have return successors, (845), 845 states have call predecessors, (845), 845 states have call successors, (845) [2024-09-21 11:58:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2884 transitions. [2024-09-21 11:58:18,991 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2884 transitions. Word has length 120 [2024-09-21 11:58:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:58:18,992 INFO L474 AbstractCegarLoop]: Abstraction has 1808 states and 2884 transitions. [2024-09-21 11:58:18,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-21 11:58:18,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:58:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2884 transitions. [2024-09-21 11:58:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-21 11:58:18,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:58:18,994 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] [2024-09-21 11:58:19,001 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-21 11:58:19,194 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 [2024-09-21 11:58:19,195 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:58:19,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:58:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-21 11:58:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:58:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697427630] [2024-09-21 11:58:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:58:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:58:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:58:19,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102592089] [2024-09-21 11:58:19,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:58:19,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:58:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:58:19,209 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) [2024-09-21 11:58:19,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-21 11:58:19,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-21 11:58:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:58:19,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-21 11:58:19,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:58:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-21 11:58:19,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:58:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-21 11:58:22,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:58:22,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697427630] [2024-09-21 11:58:22,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:58:22,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102592089] [2024-09-21 11:58:22,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102592089] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:58:22,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:58:22,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-09-21 11:58:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274120426] [2024-09-21 11:58:22,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:58:22,611 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-21 11:58:22,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:58:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-21 11:58:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-09-21 11:58:22,612 INFO L87 Difference]: Start difference. First operand 1808 states and 2884 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-21 11:58:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:58:39,896 INFO L93 Difference]: Finished difference Result 2210 states and 3523 transitions. [2024-09-21 11:58:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-21 11:58:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 132 [2024-09-21 11:58:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:58:39,906 INFO L225 Difference]: With dead ends: 2210 [2024-09-21 11:58:39,906 INFO L226 Difference]: Without dead ends: 2204 [2024-09-21 11:58:39,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1277, Invalid=5695, Unknown=0, NotChecked=0, Total=6972 [2024-09-21 11:58:39,907 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 212 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:58:39,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 794 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-21 11:58:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2024-09-21 11:58:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2019. [2024-09-21 11:58:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1016 states have (on average 1.3061023622047243) internal successors, (1327), 1016 states have internal predecessors, (1327), 955 states have call successors, (955), 49 states have call predecessors, (955), 47 states have return successors, (953), 953 states have call predecessors, (953), 953 states have call successors, (953) [2024-09-21 11:58:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3235 transitions. [2024-09-21 11:58:44,280 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3235 transitions. Word has length 132 [2024-09-21 11:58:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:58:44,280 INFO L474 AbstractCegarLoop]: Abstraction has 2019 states and 3235 transitions. [2024-09-21 11:58:44,281 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-21 11:58:44,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:58:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3235 transitions. [2024-09-21 11:58:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-21 11:58:44,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:58:44,283 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] [2024-09-21 11:58:44,297 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-21 11:58:44,487 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 [2024-09-21 11:58:44,488 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:58:44,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:58:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 7 times [2024-09-21 11:58:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:58:44,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872868488] [2024-09-21 11:58:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:58:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:58:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:58:44,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532348427] [2024-09-21 11:58:44,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 11:58:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:58:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:58:44,510 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) [2024-09-21 11:58:44,511 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-21 11:58:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:58:44,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-21 11:58:44,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:58:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 38 proven. 69 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-21 11:58:45,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:58:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-21 11:58:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:58:49,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872868488] [2024-09-21 11:58:49,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:58:49,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532348427] [2024-09-21 11:58:49,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532348427] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:58:49,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:58:49,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2024-09-21 11:58:49,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886493904] [2024-09-21 11:58:49,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:58:49,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-21 11:58:49,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:58:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-21 11:58:49,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 11:58:49,141 INFO L87 Difference]: Start difference. First operand 2019 states and 3235 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2024-09-21 11:59:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:59:29,592 INFO L93 Difference]: Finished difference Result 2697 states and 4265 transitions. [2024-09-21 11:59:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-09-21 11:59:29,592 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) Word has length 140 [2024-09-21 11:59:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:59:29,604 INFO L225 Difference]: With dead ends: 2697 [2024-09-21 11:59:29,605 INFO L226 Difference]: Without dead ends: 2493 [2024-09-21 11:59:29,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6856 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=3569, Invalid=17601, Unknown=0, NotChecked=0, Total=21170 [2024-09-21 11:59:29,608 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 558 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:59:29,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1188 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-09-21 11:59:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-09-21 11:59:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2201. [2024-09-21 11:59:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1113 states have (on average 1.3018867924528301) internal successors, (1449), 1113 states have internal predecessors, (1449), 1035 states have call successors, (1035), 54 states have call predecessors, (1035), 52 states have return successors, (1033), 1033 states have call predecessors, (1033), 1033 states have call successors, (1033) [2024-09-21 11:59:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3517 transitions. [2024-09-21 11:59:34,933 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3517 transitions. Word has length 140 [2024-09-21 11:59:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:59:34,934 INFO L474 AbstractCegarLoop]: Abstraction has 2201 states and 3517 transitions. [2024-09-21 11:59:34,934 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2024-09-21 11:59:34,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:59:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3517 transitions. [2024-09-21 11:59:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-09-21 11:59:34,938 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:59:34,939 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:59:34,952 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-21 11:59:35,139 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 [2024-09-21 11:59:35,139 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:59:35,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:59:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1290054545, now seen corresponding path program 8 times [2024-09-21 11:59:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:59:35,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551398444] [2024-09-21 11:59:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:59:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:59:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:59:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:59:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:59:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:59:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:59:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:59:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 11:59:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:59:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-21 11:59:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-21 11:59:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-21 11:59:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-21 11:59:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-21 11:59:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-21 11:59:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-21 11:59:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-21 11:59:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-21 11:59:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-21 11:59:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-21 11:59:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-21 11:59:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-21 11:59:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-21 11:59:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-21 11:59:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-21 11:59:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-21 11:59:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:59:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-09-21 11:59:35,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:59:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551398444] [2024-09-21 11:59:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551398444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:59:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459432100] [2024-09-21 11:59:35,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:59:35,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:59:35,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:59:35,303 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) [2024-09-21 11:59:35,304 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-21 11:59:35,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:59:35,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:59:35,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 11:59:35,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:59:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 458 proven. 18 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-21 11:59:35,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:59:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-09-21 11:59:35,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459432100] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:59:35,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:59:35,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-21 11:59:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73188517] [2024-09-21 11:59:35,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:59:35,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 11:59:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:59:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 11:59:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-21 11:59:35,549 INFO L87 Difference]: Start difference. First operand 2201 states and 3517 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2024-09-21 11:59:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:59:41,643 INFO L93 Difference]: Finished difference Result 3578 states and 5730 transitions. [2024-09-21 11:59:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:59:41,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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 157 [2024-09-21 11:59:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:59:41,656 INFO L225 Difference]: With dead ends: 3578 [2024-09-21 11:59:41,656 INFO L226 Difference]: Without dead ends: 2493 [2024-09-21 11:59:41,660 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:59:41,661 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:59:41,661 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 248 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:59:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-09-21 11:59:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2297. [2024-09-21 11:59:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 1195 states have (on average 1.284518828451883) internal successors, (1535), 1227 states have internal predecessors, (1535), 1049 states have call successors, (1049), 54 states have call predecessors, (1049), 52 states have return successors, (1047), 1015 states have call predecessors, (1047), 1047 states have call successors, (1047) [2024-09-21 11:59:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3631 transitions. [2024-09-21 11:59:46,927 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3631 transitions. Word has length 157 [2024-09-21 11:59:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:59:46,928 INFO L474 AbstractCegarLoop]: Abstraction has 2297 states and 3631 transitions. [2024-09-21 11:59:46,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2024-09-21 11:59:46,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:59:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3631 transitions. [2024-09-21 11:59:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-21 11:59:46,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:59:46,932 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2024-09-21 11:59:46,941 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-21 11:59:47,132 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 [2024-09-21 11:59:47,133 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:59:47,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:59:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash -758309700, now seen corresponding path program 9 times [2024-09-21 11:59:47,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:59:47,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523867299] [2024-09-21 11:59:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:59:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:59:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:59:47,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849977800] [2024-09-21 11:59:47,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:59:47,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:59:47,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:59:47,155 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) [2024-09-21 11:59:47,156 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-21 11:59:47,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 11:59:47,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:59:47,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-21 11:59:47,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:59:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 105 proven. 48 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2024-09-21 11:59:48,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:59:49,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:59:49,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523867299] [2024-09-21 11:59:49,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:59:49,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849977800] [2024-09-21 11:59:49,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849977800] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:59:49,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:59:49,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-21 11:59:49,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779615416] [2024-09-21 11:59:49,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:59:49,925 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 11:59:49,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:59:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 11:59:49,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-09-21 11:59:49,926 INFO L87 Difference]: Start difference. First operand 2297 states and 3631 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-21 11:59:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:59:57,379 INFO L93 Difference]: Finished difference Result 2587 states and 4085 transitions. [2024-09-21 11:59:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 11:59:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 159 [2024-09-21 11:59:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:59:57,389 INFO L225 Difference]: With dead ends: 2587 [2024-09-21 11:59:57,390 INFO L226 Difference]: Without dead ends: 2582 [2024-09-21 11:59:57,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 11:59:57,391 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 72 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:59:57,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 587 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-21 11:59:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2024-09-21 12:00:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2535. [2024-09-21 12:00:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 1309 states have (on average 1.2880061115355232) internal successors, (1686), 1348 states have internal predecessors, (1686), 1169 states have call successors, (1169), 58 states have call predecessors, (1169), 56 states have return successors, (1167), 1128 states have call predecessors, (1167), 1167 states have call successors, (1167) [2024-09-21 12:00:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 4022 transitions. [2024-09-21 12:00:03,418 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 4022 transitions. Word has length 159 [2024-09-21 12:00:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:00:03,419 INFO L474 AbstractCegarLoop]: Abstraction has 2535 states and 4022 transitions. [2024-09-21 12:00:03,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-21 12:00:03,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:00:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 4022 transitions. [2024-09-21 12:00:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-09-21 12:00:03,423 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:00:03,424 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2024-09-21 12:00:03,436 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-21 12:00:03,624 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 [2024-09-21 12:00:03,624 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:00:03,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:00:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash -998768174, now seen corresponding path program 10 times [2024-09-21 12:00:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:00:03,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539096606] [2024-09-21 12:00:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:00:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:00:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:00:03,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820092605] [2024-09-21 12:00:03,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:00:03,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:00:03,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:00:03,661 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) [2024-09-21 12:00:03,662 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-21 12:00:03,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:00:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:00:03,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-09-21 12:00:03,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:00:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 96 proven. 100 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2024-09-21 12:00:05,388 INFO L327 TraceCheckSpWp]: Computing backward predicates...